Updating ProtocolLib for 1.7.2.

Still a work in progress.

ProtocolLib/pom.xml

@@ -231,7 +231,7 @@
   	<dependency>
   		<groupId>org.bukkit</groupId>
   		<artifactId>craftbukkit</artifactId>
-  		<version>1.6.4-R2.0</version>
+  		<version>1.7.2-R0.1-SNAPSHOT</version>
   		<scope>provided</scope>
   	</dependency>
   	<dependency>

ProtocolLib/src/main/java/com/comphenix/protocol/CleanupStaticMembers.java

@@ -70,6 +70,7 @@ class CleanupStaticMembers {
 	 */
 	public void resetAll() {
 		// This list must always be updated
+		@SuppressWarnings("deprecation")
 		Class<?>[] publicClasses = { 
 				AsyncListenerHandler.class, ListeningWhitelist.class, PacketContainer.class, 
 				BukkitUnwrapper.class, DefaultInstances.class, CollectionGenerator.class,

ProtocolLib/src/main/java/com/comphenix/protocol/PacketType.java

@@ -1,8 +1,23 @@
 package com.comphenix.protocol;
 
 import java.io.Serializable;
+import java.util.Arrays;
+import java.util.List;
+import java.util.UUID;
+import java.util.concurrent.Callable;
+import java.util.concurrent.Future;
+
+import org.bukkit.Bukkit;
+
+import com.comphenix.protocol.injector.packet.PacketRegistry;
 import com.comphenix.protocol.reflect.ObjectEnum;
+import com.comphenix.protocol.utility.MinecraftVersion;
+
 import com.google.common.base.Objects;
+import com.google.common.base.Preconditions;
+import com.google.common.collect.Iterables;
+import com.google.common.collect.Lists;
+import com.google.common.util.concurrent.Futures;
 
 /**
  * Represents the type of a packet in a specific protocol.
@@ -15,23 +30,66 @@ public class PacketType implements Serializable {
 	// Increment whenever the type changes
 	private static final long serialVersionUID = 1L;
 
+	/**
+	 * Represents an unknown legacy packet ID.
+	 */
+	public static final int UNKNOWN_PACKET = -1;
+	
+	/**
+	 * Packets sent during handshake.
+	 * @author Kristian
+	 */
 	public static class Handshake {
-		public static final Protocol PROTOCOL = Protocol.HANDSHAKE;
+		private static final Protocol PROTOCOL = Protocol.HANDSHAKING;
 		
 		public static class Client extends ObjectEnum<PacketType> {
-			public final static Sender SENDER = Sender.CLIENT;
-			public final static Client INSTANCE = new Client();
-			
+			private final static Sender SENDER = Sender.CLIENT;
 			public static final PacketType HANDSHAKE = new PacketType(PROTOCOL, SENDER, 0x00, 2);
+			
+			private final static Client INSTANCE = new Client();
+			
+			// Prevent accidental construction
+			private Client() { super(PacketType.class); }
+			
+			public static Client getInstance() {
+				return INSTANCE;
+			}
+			public static Sender getSender() {
+				return SENDER;
 			}
 		}
 		
-	public static class Game {
-		public static final Protocol PROTOCOL = Protocol.GAME;
+		/**
+		 * An empty enum, as the server will not send any packets in this protocol.
+		 * @author Kristian
+		 */
+		public static class Server extends ObjectEnum<PacketType> {
+			private final static Sender SENDER = Sender.CLIENT;
+			private final static Server INSTANCE = new Server();
+			private Server() { super(PacketType.class); }
+
+			public static Server getInstance() {
+				return INSTANCE;
+			}
+			public static Sender getSender() {
+				return SENDER;
+			}
+		}
+		
+		public static Protocol getProtocol() {
+			return PROTOCOL;
+		}
+	}
+	
+	/**
+	 * Packets sent and recieved when logged into the game.
+	 * @author Kristian
+	 */
+	public static class Play {
+		private static final Protocol PROTOCOL = Protocol.GAME;
 		
 		public static class Server extends ObjectEnum<PacketType> {		
-			public final static Sender SENDER = Sender.SERVER;
-			public final static Server INSTANCE = new Server();
+			private final static Sender SENDER = Sender.SERVER;
 			
 			public static final PacketType KEEP_ALIVE = 		 	  new PacketType(PROTOCOL, SENDER, 0x00, 0);
 			public static final PacketType LOGIN = 					  new PacketType(PROTOCOL, SENDER, 0x01, 1);
@@ -99,11 +157,23 @@ public class PacketType implements Serializable {
 			public static final PacketType SET_SCOREOARD_TEAM =       new PacketType(PROTOCOL, SENDER, 0x3E, 209);
 			public static final PacketType CUSTOM_PAYLOAD =           new PacketType(PROTOCOL, SENDER, 0x3F, 250);
 			public static final PacketType KICK_DISCONNECT =          new PacketType(PROTOCOL, SENDER, 0x40, 255);
+			
+			// The instance must 
+			private final static Server INSTANCE = new Server();
+			
+			// Prevent accidental construction
+			private Server() { super(PacketType.class); }
+			
+			public static Sender getSender() {
+				return SENDER;
+			}
+			public static Server getInstance() {
+				return INSTANCE;
+			}
 		}
 		
 		public static class Client extends ObjectEnum<PacketType> {
-			public final static Sender SENDER = Sender.CLIENT;
-			public final static Client INSTANCE = new Client();
+			private final static Sender SENDER = Sender.CLIENT;
 			
 			public static final PacketType KEEP_ALIVE =          	  new PacketType(PROTOCOL, SENDER, 0x00, 0);
 			public static final PacketType CHAT =          			  new PacketType(PROTOCOL, SENDER, 0x01, 3);
@@ -129,51 +199,127 @@ public class PacketType implements Serializable {
 			public static final PacketType LOCALE_AND_VIEW_DISTANCE = new PacketType(PROTOCOL, SENDER, 0x15, 204);
 			public static final PacketType CLIENT_COMMAND =           new PacketType(PROTOCOL, SENDER, 0x16, 205);
 			public static final PacketType CUSTOM_PAYLOAD =           new PacketType(PROTOCOL, SENDER, 0x17, 250);
+			
+			private final static Client INSTANCE = new Client();
+			
+			// Prevent accidental construction
+			private Client() { super(PacketType.class); }
+			
+			public static Sender getSender() {
+				return SENDER;
+			}
+			public static Client getInstance() {
+				return INSTANCE;
 			}
 		}
 		
+		public static Protocol getProtocol() {
+			return PROTOCOL;
+		}
+	}
+	
+	/**
+	 * Packets sent and recieved when querying the server in the multiplayer menu.
+	 * @author Kristian
+	 */
 	public static class Status {
-		public static final Protocol PROTOCOL = Protocol.STATUS;
+		private static final Protocol PROTOCOL = Protocol.STATUS;
 		
 		public static class Server extends ObjectEnum<PacketType> {
-			public final static Sender SENDER = Sender.SERVER;
-			public final static Server INSTANCE = new Server();
+			private final static Sender SENDER = Sender.SERVER;
 			
 			public static final PacketType KICK_DISCONNECT =   new PacketType(PROTOCOL, SENDER, 0x00, 255);
 			@SuppressWarnings("deprecation")
-			public static final PacketType PING_TIME =         new PacketType(PROTOCOL, SENDER, 0x00, Packets.Server.PING_TIME);
+			public static final PacketType PING_TIME =         new PacketType(PROTOCOL, SENDER, 0x01, Packets.Server.PING_TIME);
+			
+			private final static Server INSTANCE = new Server();
+			
+			// Prevent accidental construction
+			private Server() { super(PacketType.class); }
+			
+			public static Sender getSender() {
+				return SENDER;
+			}
+			public static Server getInstance() {
+				return INSTANCE;
+			}
 		}
 		
 		public static class Client extends ObjectEnum<PacketType> {
-			public final static Sender SENDER = Sender.CLIENT;
-			public final static Client INSTANCE = new Client();
+			private final static Sender SENDER = Sender.CLIENT;		
 			
 			public static final PacketType STATUS_REQUEST =    new PacketType(PROTOCOL, SENDER, 0x00, 254);
 			@SuppressWarnings("deprecation")
-			public static final PacketType PING_TIME =         new PacketType(PROTOCOL, SENDER, 0x00, Packets.Client.PING_TIME);
+			public static final PacketType PING_TIME =         new PacketType(PROTOCOL, SENDER, 0x01, Packets.Client.PING_TIME);
+			
+			private final static Client INSTANCE = new Client();
+			
+			// Prevent accidental construction
+			private Client() { super(PacketType.class); }
+			
+			public static Sender getSender() {
+				return SENDER;
+			}
+			public static Client getInstance() {
+				return INSTANCE;
 			}
 		}
 		
+		public static Protocol getProtocol() {
+			return PROTOCOL;
+		}
+	}
+	
+	/**
+	 * Packets sent and recieved when logging in to the server.
+	 * @author Kristian
+	 */
 	public static class Login {
-		public static final Protocol PROTOCOL = Protocol.LOGIN;
+		private static final Protocol PROTOCOL = Protocol.LOGIN;
 		
 		public static class Server extends ObjectEnum<PacketType> {
-			public final static Sender SENDER = Sender.SERVER;
-			public final static Server INSTANCE = new Server();
+			private final static Sender SENDER = Sender.SERVER;
 			
 			public static final PacketType KICK_DISCONNECT =   new PacketType(PROTOCOL, SENDER, 0x00, 255);
 			public static final PacketType KEY_REQUEST =       new PacketType(PROTOCOL, SENDER, 0x01, 253);
 			@SuppressWarnings("deprecation")
 			public static final PacketType LOGIN_SUCCESS =     new PacketType(PROTOCOL, SENDER, 0x02, Packets.Server.LOGIN_SUCCESS);
+
+			private final static Server INSTANCE = new Server();
+			
+			// Prevent accidental construction
+			private Server() { super(PacketType.class); }
+			
+			public static Sender getSender() {
+				return SENDER;
+			}
+			public static Server getInstance() {
+				return INSTANCE;
+			}
 		}
 		
 		public static class Client extends ObjectEnum<PacketType> {
-			public final static Sender SENDER = Sender.CLIENT;
-			public final static Client INSTANCE = new Client();
+			private final static Sender SENDER = Sender.CLIENT;
 			
 			@SuppressWarnings("deprecation")
 			public static final PacketType LOGIN_START =       new PacketType(PROTOCOL, SENDER, 0x00, Packets.Client.LOGIN_START);
 			public static final PacketType KEY_RESPONSE =      new PacketType(PROTOCOL, SENDER, 0x01, 252);
+
+			private final static Client INSTANCE = new Client();
+			
+			// Prevent accidental construction
+			private Client() { super(PacketType.class); }
+			
+			public static Sender getSender() {
+				return SENDER;
+			}
+			public static Client getInstance() {
+				return INSTANCE;
+			}
+		}
+		
+		public static Protocol getProtocol() {
+			return PROTOCOL;
 		}
 	}
 	
@@ -182,10 +328,29 @@ public class PacketType implements Serializable {
 	 * @author Kristian
 	 */
 	public enum Protocol {
-		HANDSHAKE,
+		HANDSHAKING,
 		GAME,
 		STATUS,
-		LOGIN
+		LOGIN;
+		
+		/**
+		 * Retrieve the correct protocol enum from a given vanilla enum instance.
+		 * @param vanilla - the vanilla protocol enum instance.
+		 * @return The corresponding protocol.
+		 */
+		public static Protocol fromVanilla(Enum<?> vanilla) {
+			String name = vanilla.name();
+			
+			if ("HANDSHAKING".equals(name))
+					return HANDSHAKING;
+			if ("PLAY".equals(name))
+				return GAME;
+			if ("STATUS".equals(name))
+				return STATUS;
+			if ("LOGIN".equals(name))
+				return LOGIN;
+			throw new IllegalArgumentException("Unrecognized vanilla enum " + vanilla);
+		}
 	}
 	
 	/**
@@ -205,10 +370,166 @@ public class PacketType implements Serializable {
 		SERVER
 	}
 	
+	// Lookup of packet types
+	private static PacketTypeLookup LOOKUP;
+	
+	/**
+	 * Protocol version of all the current IDs.
+	 */
+	private static final MinecraftVersion PROTOCOL_VERSION = MinecraftVersion.WORLD_UPDATE;
+	
 	private final Protocol protocol;
 	private final Sender sender;
 	private final int currentId;
 	private final int legacyId;
+	private final MinecraftVersion version;
+	
+	/**
+	 * Retrieve the current packet/legacy lookup.
+	 * @return The packet type lookup.
+	 */
+	private static PacketTypeLookup getLookup() {
+		if (LOOKUP == null) {
+			LOOKUP = new PacketTypeLookup().
+				addPacketTypes(Handshake.Client.getInstance()).
+				addPacketTypes(Handshake.Server.getInstance()).
+				addPacketTypes(Play.Client.getInstance()).
+				addPacketTypes(Play.Server.getInstance()).
+				addPacketTypes(Status.Client.getInstance()).
+				addPacketTypes(Status.Server.getInstance()).
+				addPacketTypes(Login.Client.getInstance()).
+				addPacketTypes(Login.Server.getInstance());
+		}
+		return LOOKUP;
+	}
+	
+	/**
+	 * Find every packet type known to the current version of ProtocolLib.
+	 * @return Every packet type.
+	 */
+	public static Iterable<PacketType> values() {
+		List<Iterable<? extends PacketType>> sources = Lists.newArrayList();
+		sources.add(Handshake.Client.getInstance());
+		sources.add(Handshake.Server.getInstance());
+		sources.add(Play.Client.getInstance());
+		sources.add(Play.Server.getInstance());
+		sources.add(Status.Client.getInstance());
+		sources.add(Status.Server.getInstance());
+		sources.add(Login.Client.getInstance());
+		sources.add(Login.Server.getInstance());
+		return Iterables.concat(sources);
+	}
+	
+	/**
+	 * Retrieve a packet type from a legacy (1.6.4 and below) packet ID.
+	 * @param packetId - the legacy packet ID.
+	 * @return The corresponding packet type.
+	 * @throws IllegalArgumentException If the legacy packet could not be found.
+	 */
+	public static PacketType findLegacy(int packetId) {
+		PacketType type = getLookup().getFromLegacy(packetId);
+		
+		if (type != null)
+			return type;
+		throw new IllegalArgumentException("Cannot find legacy packet " + packetId);
+	}
+	
+	/**
+	 * Retrieve a packet type from a protocol, sender and packet ID.
+	 * @param protocol - the current protocol.
+	 * @param sender - the sender.
+	 * @param packetId - the packet ID.
+	 * @return The corresponding packet type.
+	 * @throws IllegalArgumentException If the current packet could not be found.
+	 */
+	public static PacketType findCurrent(Protocol protocol, Sender sender, int packetId) {
+		PacketType type = getLookup().getFromCurrent(protocol, sender, packetId);
+		
+		if (type != null)
+			return type;
+		throw new IllegalArgumentException("Cannot find packet " + packetId + 
+				"(Protocol: " + protocol + ", Sender: " + sender + ")");
+	}
+	
+	/**
+	 * Retrieve a packet type from a protocol, sender and packet ID.
+	 * <p>
+	 * The packet will automatically be registered if its missing.
+	 * @param protocol - the current protocol.
+	 * @param sender - the sender.
+	 * @param packetId - the packet ID.
+	 * @param legacyId - the legacy packet ID. Can be UNKNOWN_PACKET.
+	 * @return The corresponding packet type.
+	 */
+	public static PacketType fromCurrent(Protocol protocol, Sender sender, int packetId, int legacyId) {
+		PacketType type = getLookup().getFromCurrent(protocol, sender, packetId);
+		
+		if (type == null) {
+			type = new PacketType(protocol, sender, packetId, legacyId);
+			
+			// Many may be scheduled, but only the first will be executed
+			scheduleRegister(type, "Dynamic-" + UUID.randomUUID().toString());
+		}
+		return type;
+	}
+	
+	/**
+	 * Register a particular packet type.
+	 * <p>
+	 * Note that the registration will be performed on the main thread. 
+	 * @param type - the type to register.
+	 * @param name - the name of the packet.
+	 * @return A future telling us if our instance was registrered.
+	 */
+	public static Future<Boolean> scheduleRegister(final PacketType type, final String name) {
+		Callable<Boolean> callable = new Callable<Boolean>() {
+			@Override
+			public Boolean call() throws Exception {
+				ObjectEnum<PacketType> objEnum;
+				
+				// A bit ugly, but performance is critical
+				switch (type.getProtocol()) {
+					case HANDSHAKING:
+						objEnum = type.isClient() ? Handshake.Client.getInstance() : Handshake.Server.getInstance(); break;
+					case GAME:
+						objEnum = type.isClient() ? Play.Client.getInstance() : Play.Server.getInstance(); break;
+					case STATUS:
+						objEnum = type.isClient() ? Status.Client.getInstance() : Status.Server.getInstance(); break;
+					case LOGIN:
+						objEnum = type.isClient() ? Login.Client.getInstance() : Login.Server.getInstance(); break;
+					default:
+						throw new IllegalStateException("Unexpected protocol: " + type.getProtocol());
+				}
+				
+				if (objEnum.registerMember(type, name)) {
+					getLookup().addPacketTypes(Arrays.asList(type));
+					return true;
+				}
+				return false;
+			}
+		};
+
+		// Execute in the main thread if possible
+		if (Bukkit.getServer() == null || Bukkit.isPrimaryThread()) {
+			try {
+				return Futures.immediateFuture(callable.call());
+			} catch (Exception e) {
+				return Futures.immediateFailedFuture(e);
+			}
+		}
+		return ProtocolLibrary.getExecutorSync().submit(callable);
+	}
+	
+	/**
+	 * Construct a new packet type.
+	 * @param protocol - the current protocol.
+	 * @param target - the target - client or server.
+	 * @param currentId - the current packet ID, or 
+	 * @param legacyId - the legacy packet ID.
+	 */
+	public PacketType(Protocol protocol, Sender sender, int currentId, int legacyId) {
+		this(protocol, sender, currentId, legacyId, PROTOCOL_VERSION);
+	}
 
 	/**
 	 * Construct a new packet type.
@@ -216,12 +537,22 @@ public class PacketType implements Serializable {
 	 * @param target - the target - client or server.
 	 * @param currentId - the current packet ID.
 	 * @param legacyId - the legacy packet ID.
+	 * @param version - the version of the current ID.
 	 */
-	public PacketType(Protocol protocol, Sender sender, int currentId, int legacyId) {
-		this.protocol = protocol;
-		this.sender = sender;
+	public PacketType(Protocol protocol, Sender sender, int currentId, int legacyId, MinecraftVersion version) {
+		this.protocol = Preconditions.checkNotNull(protocol, "protocol cannot be NULL");
+		this.sender = Preconditions.checkNotNull(sender, "sender cannot be NULL");
 		this.currentId = currentId;
 		this.legacyId = legacyId;
+		this.version = version;
+	}
+	
+	/**
+	 * Determine if this packet is supported on the current server.
+	 * @return Whether or not the packet is supported.
+	 */
+	public boolean isSupported() {
+		return PacketRegistry.isSupported(this);
 	}
 
 	/**
@@ -240,6 +571,22 @@ public class PacketType implements Serializable {
 		return sender;
 	}
 	
+	/**
+	 * Determine if this packet was sent by the client.
+	 * @return TRUE if it was, FALSE otherwise.
+	 */
+	public boolean isClient() {
+		return sender == Sender.CLIENT;
+	}
+	
+	/**
+	 * Determine if this packet was sent by the server.
+	 * @return TRUE if it was, FALSE otherwise.
+	 */
+	public boolean isServer() {
+		return sender == Sender.SERVER;
+	}
+	
 	/**
 	 * Retrieve the current protocol ID for this packet type.
 	 * <p>
@@ -251,10 +598,26 @@ public class PacketType implements Serializable {
 	}
 	
 	/**
-	 * Retrieve the legacy (pre 1.7.2) protocol ID of the packet type.
+	 * Retrieve the equivalent packet class.
+	 * @return The packet class.
+	 */
+	public Class<?> getPacketClass() {
+		return PacketRegistry.getPacketClassFromType(this);
+	}
+	
+	/**
+	 * Retrieve the Minecraft version for the current ID.
+	 * @return The Minecraft version.
+	 */
+	public MinecraftVersion getCurrentVersion() {
+		return version;
+	}
+	
+	/**
+	 * Retrieve the legacy (1.6.4 or below) protocol ID of the packet type.
 	 * <p>
 	 * This ID is globally unique.
-	 * @return The legacy ID.
+	 * @return The legacy ID, or {@link #UNKNOWN_PACKET} if unknown.
 	 */
 	public int getLegacyId() {
 		return legacyId;
@@ -262,7 +625,7 @@ public class PacketType implements Serializable {
 
 	@Override
 	public int hashCode() {
-		return Objects.hashCode(protocol, sender, legacyId, currentId);
+		return Objects.hashCode(protocol, sender, currentId);
 	}
 	
 	@Override
@@ -281,6 +644,8 @@ public class PacketType implements Serializable {
 	
 	@Override
 	public String toString() {
-		return "Packet [protocol=" + protocol + ", sender=" + sender + ", legacyId=" + legacyId + ", currentId=" + currentId + "]";
+		Class<?> clazz = getPacketClass();
+		return (clazz != null ? clazz.getSimpleName() : "UNREGISTERED") + 
+			" [" + protocol + ", " + sender + ", " + currentId + ", legacy: " + legacyId + "]";
 	}
 }

ProtocolLib/src/main/java/com/comphenix/protocol/PacketTypeLookup.java

@@ -0,0 +1,90 @@
+package com.comphenix.protocol;
+
+import com.comphenix.protocol.PacketType.Protocol;
+import com.comphenix.protocol.PacketType.Sender;
+import com.comphenix.protocol.collections.IntegerMap;
+import com.google.common.base.Preconditions;
+
+/**
+ * Retrieve a packet type based on its version and ID, optionally with protocol and sender too.
+ * @author Kristian
+ */
+class PacketTypeLookup {
+	private static class ProtocolSenderLookup {
+		// Unroll lookup for performance reasons
+		public final IntegerMap<PacketType> HANDSHAKE_CLIENT = IntegerMap.newMap();
+		public final IntegerMap<PacketType> HANDSHAKE_SERVER = IntegerMap.newMap();
+		public final IntegerMap<PacketType> GAME_CLIENT = IntegerMap.newMap();
+		public final IntegerMap<PacketType> GAME_SERVER = IntegerMap.newMap();
+		public final IntegerMap<PacketType> STATUS_CLIENT = IntegerMap.newMap();
+		public final IntegerMap<PacketType> STATUS_SERVER = IntegerMap.newMap();
+		public final IntegerMap<PacketType> LOGIN_CLIENT = IntegerMap.newMap();
+		public final IntegerMap<PacketType> LOGIN_SERVER = IntegerMap.newMap();
+		
+		/**
+		 * Retrieve the correct integer map for a specific protocol and sender.
+		 * @param protocol - the protocol.
+		 * @param sender - the sender.
+		 * @return The integer map of packets.
+		 */
+		public IntegerMap<PacketType> getMap(Protocol protocol, Sender sender) {
+			switch (protocol) {
+				case HANDSHAKING: 
+					return sender == Sender.CLIENT ? HANDSHAKE_CLIENT : HANDSHAKE_SERVER;
+				case GAME:
+					return sender == Sender.CLIENT ? GAME_CLIENT : GAME_SERVER;
+				case STATUS:
+					return sender == Sender.CLIENT ? STATUS_CLIENT : STATUS_SERVER;
+				case LOGIN:
+					return sender == Sender.CLIENT ? LOGIN_CLIENT : LOGIN_SERVER;
+				default:
+					throw new IllegalArgumentException("Unable to find protocol " + protocol);
+			}
+		}
+	}
+	
+	// Packet IDs from 1.6.4 and below
+	private final IntegerMap<PacketType> legacyLookup = new IntegerMap<PacketType>();
+	
+	// Packets for 1.7.2
+	private final ProtocolSenderLookup currentLookup = new ProtocolSenderLookup();
+
+	/**
+	 * Add a collection of packet types to the lookup.
+	 * @param types - the types to add.
+	 */
+	public PacketTypeLookup addPacketTypes(Iterable<? extends PacketType> types) {
+		Preconditions.checkNotNull(types, "types cannot be NULL");
+		
+		for (PacketType type : types) {
+			int legacy = type.getLegacyId();
+			
+			// Skip unknown legacy packets
+			if (legacy != PacketType.UNKNOWN_PACKET) {
+				legacyLookup.put(type.getLegacyId(), type);
+			}
+			currentLookup.getMap(type.getProtocol(), type.getSender()).put(type.getCurrentId(), type);
+		}
+		return this;
+	}
+	
+	/**
+	 * Retrieve a packet type from a legacy (1.6.4 and below) packet ID.
+	 * @param packetId - the legacy packet ID.
+	 * @return The corresponding packet type, or NULL if not found.
+	 */
+	public PacketType getFromLegacy(int packetId) {
+		return legacyLookup.get(packetId);
+	}
+	
+	/**
+	 * Retrieve a packet type from a protocol, sender and packet ID.
+	 * @param protocol - the current protocol.
+	 * @param sender - the sender.
+	 * @param packetId - the packet ID.
+	 * @return The corresponding packet type, or NULL if not found.
+	 */
+	public PacketType getFromCurrent(Protocol protocol, Sender sender, int packetId) {
+		return currentLookup.getMap(protocol, sender).get(packetId);
+	}
+}

ProtocolLib/src/main/java/com/comphenix/protocol/ProtocolLibrary.java

@@ -33,6 +33,7 @@ import org.bukkit.command.PluginCommand;
 import org.bukkit.plugin.PluginManager;
 import org.bukkit.plugin.java.JavaPlugin;
 
+import com.comphenix.executors.BukkitExecutors;
 import com.comphenix.protocol.async.AsyncFilterManager;
 import com.comphenix.protocol.error.BasicErrorReporter;
 import com.comphenix.protocol.error.DelegatedErrorReporter;
@@ -54,6 +55,7 @@ import com.comphenix.protocol.utility.MinecraftVersion;
 import com.google.common.base.Splitter;
 import com.google.common.collect.Iterables;
 import com.google.common.collect.Sets;
+import com.google.common.util.concurrent.ListeningScheduledExecutorService;
 
 /**
  * The main entry point for ProtocolLib.
@@ -114,11 +116,15 @@ public class ProtocolLibrary extends JavaPlugin {
 	// Metrics and statistisc
 	private Statistics statistisc;
 
+	// Executors
+	private static ListeningScheduledExecutorService executorAsync;
+	private static ListeningScheduledExecutorService executorSync;
+	
 	// Structure compiler
 	private BackgroundCompiler backgroundCompiler;
 	
-	// Used to clean up server packets that have expired. 
-	// But mostly required to simulate recieving client packets.
+	// Used to clean up server packets that have expired. But mostly required to simulate 
+	// recieving client packets.
 	private int asyncPacketTask = -1;
 	private int tickCounter = 0;
 	private static final int ASYNC_PACKET_DELAY = 1;
@@ -150,6 +156,10 @@ public class ProtocolLibrary extends JavaPlugin {
 		// Load configuration
 		logger = getLoggerSafely();
 		
+		// Initialize executors
+		executorAsync = BukkitExecutors.newAsynchronous(this);
+		executorSync = BukkitExecutors.newSynchronous(this);
+		
 		// Add global parameters
 		DetailedErrorReporter detailedReporter = new DetailedErrorReporter(this);
 		reporter = getFilteredReporter(detailedReporter);
@@ -526,6 +536,9 @@ public class ProtocolLibrary extends JavaPlugin {
 			return;
 		}
 		
+		// Bukkit will shut down tasks on our executors
+		// ...
+		
 		// Disable compiler
 		if (backgroundCompiler != null) {
 			backgroundCompiler.shutdownAll();
@@ -605,4 +618,24 @@ public class ProtocolLibrary extends JavaPlugin {
 	public Statistics getStatistics() {
 		return statistisc;
 	}
+	
+	/**
+	 * Retrieve an executor service for performing asynchronous tasks on the behalf of ProtocolLib.
+	 * <p>
+	 * Note that this service is NULL if ProtocolLib has not been initialized yet.
+	 * @return The executor service, or NULL.
+	 */
+	public static ListeningScheduledExecutorService getExecutorAsync() {
+		return executorAsync;
+	}
+	
+	/**
+	 * Retrieve an executor service for performing synchronous tasks (main thread) on the behalf of ProtocolLib.
+	 * <p>
+	 * Note that this service is NULL if ProtocolLib has not been initialized yet.
+	 * @return The executor service, or NULL.
+	 */
+	public static ListeningScheduledExecutorService getExecutorSync() {
+		return executorSync;
+	}
 }

ProtocolLib/src/main/java/com/comphenix/protocol/collections/IntegerMap.java

@@ -0,0 +1,139 @@
+package com.comphenix.protocol.collections;
+
+import java.util.Arrays;
+import java.util.Map;
+
+import com.google.common.base.Preconditions;
+import com.google.common.collect.Maps;
+
+/**
+ * Represents a very quick integer-based lookup map, with a fixed key space size.
+ * <p>
+ * Integers must be non-negative.
+ * @author Kristian
+ */
+public class IntegerMap<T> {
+	private T[] array;
+	private int size;
+	
+	/**
+	 * Construct a new integer map.
+	 * @return A new integer map.
+	 */
+	public static <T> IntegerMap<T> newMap() {
+		return new IntegerMap<T>();
+	}
+	
+	/**
+	 * Construct a new integer map with a default capacity.
+	 */
+	public IntegerMap() {
+		this(8);
+	}
+	
+	/**
+	 * Construct a new integer map with a given capacity.
+	 * @param initialCapacity - the capacity.
+	 */
+	public IntegerMap(int initialCapacity) {
+		@SuppressWarnings("unchecked")
+		T[] backingArray = (T[]) new Object[initialCapacity];
+		this.array = backingArray;
+		this.size = 0;
+	}
+
+	/**
+	 * Associate an integer key with the given value.
+	 * @param key - the integer key. Cannot be negative.
+	 * @param value - the value. Cannot be NULL.
+	 * @return The previous association, or NULL if not found.
+	 */
+	public T put(int key, T value) {
+		ensureCapacity(key);
+		
+		T old = array[key];	
+		array[key] = Preconditions.checkNotNull(value, "value cannot be NULL");
+		
+		if (old == null)
+			size++;
+		return old;
+	}
+	
+	/**
+	 * Remove an association from the map.
+	 * @param key - the key of the association to remove.
+	 * @return The old associated value, or NULL.
+	 */
+	public T remove(int key) {
+		T old = array[key];
+		array[key] = null;
+		
+		if (old != null)
+			size--;
+		return old;
+	}
+	
+	/**
+	 * Resize the backing array to fit the given key.
+	 * @param key - the key.
+	 */
+	protected void ensureCapacity(int key) {
+		int newLength = array.length;
+
+		// Don't resize if the key fits
+		if (key < 0)
+			throw new IllegalArgumentException("Negative key values are not permitted.");
+		if (key < newLength)
+			return;
+		
+		while (newLength <= key) {
+			int next = newLength * 2;
+			// Handle overflow
+			newLength = next > newLength ? next : Integer.MAX_VALUE;
+		}
+		this.array = Arrays.copyOf(array, newLength);
+	}
+	
+	/**
+	 * Retrieve the number of mappings in this map.
+	 * @return The number of mapping.
+	 */
+	public int size() {
+		return size;
+	}
+
+	/**
+	 * Retrieve the value associated with a given key.
+	 * @param key - the key.
+	 * @return The value, or NULL if not found.
+	 */
+	public T get(int key) {
+		if (key >= 0 && key < array.length)
+			return array[key];
+		return null;
+	}
+	
+	/**
+	 * Determine if the given key exists in the map.
+	 * @param key - the key to check.
+	 * @return TRUE if it does, FALSE otherwise.
+	 */
+	public boolean containsKey(int key) {
+		return get(key) != null;
+	}
+	
+	/**
+	 * Convert the current map to an Integer map.
+	 * @return The Integer map.
+	 */
+	public Map<Integer, Object> toMap() {
+		Map<Integer, Object> map = Maps.newHashMap();
+		
+		for (int i = 0; i < array.length; i++) {
+			if (array[i] != null) {
+				map.put(i, array[i]);
+			}
+		}
+		return map;
+	}
+}

ProtocolLib/src/main/java/com/comphenix/protocol/events/NetworkMarker.java

@@ -31,6 +31,16 @@ public class NetworkMarker {
 	// Cache serializer too
 	private StreamSerializer serializer;
 	
+	/**
+	 * Construct a new network marker.
+	 * @param side - whether or not this marker belongs to a client or server packet. 
+	 * @param inputBuffer - the read serialized packet data.
+	 */
+	public NetworkMarker(@Nonnull ConnectionSide side, ByteBuffer inputBuffer) {
+		this.side = Preconditions.checkNotNull(side, "side cannot be NULL.");
+		this.inputBuffer = Preconditions.checkNotNull(inputBuffer, "inputBuffer cannot be NULL.");
+	}
+	
 	/**
 	 * Construct a new network marker.
 	 * <p>

ProtocolLib/src/main/java/com/comphenix/protocol/events/PacketContainer.java

@@ -28,21 +28,22 @@ import java.io.Serializable;
 import java.lang.reflect.Array;
 import java.lang.reflect.InvocationTargetException;
 import java.lang.reflect.Method;
-import java.util.Arrays;
 import java.util.Collection;
 import java.util.List;
+import java.util.Set;
 import java.util.concurrent.ConcurrentMap;
 
 import javax.annotation.Nonnull;
 import javax.annotation.Nullable;
 
+import net.minecraft.util.io.netty.buffer.ByteBuf;
+import net.minecraft.util.io.netty.buffer.UnpooledByteBufAllocator;
 import org.bukkit.World;
 import org.bukkit.WorldType;
 import org.bukkit.entity.Entity;
 import org.bukkit.inventory.ItemStack;
 
-import com.comphenix.protocol.Packets;
-import com.comphenix.protocol.concurrency.IntegerSet;
+import com.comphenix.protocol.PacketType;
 import com.comphenix.protocol.injector.StructureCache;
 import com.comphenix.protocol.reflect.EquivalentConverter;
 import com.comphenix.protocol.reflect.FuzzyReflection;
@@ -58,6 +59,7 @@ import com.comphenix.protocol.reflect.cloning.SerializableCloner;
 import com.comphenix.protocol.reflect.cloning.AggregateCloner.BuilderParameters;
 import com.comphenix.protocol.reflect.fuzzy.FuzzyMethodContract;
 import com.comphenix.protocol.reflect.instances.DefaultInstances;
+import com.comphenix.protocol.utility.MinecraftMethods;
 import com.comphenix.protocol.utility.MinecraftReflection;
 import com.comphenix.protocol.utility.StreamSerializer;
 import com.comphenix.protocol.wrappers.BukkitConverters;
@@ -69,6 +71,7 @@ import com.comphenix.protocol.wrappers.nbt.NbtBase;
 import com.google.common.base.Function;
 import com.google.common.base.Preconditions;
 import com.google.common.collect.Maps;
+import com.google.common.collect.Sets;
 
 /**
  * Represents a Minecraft packet indirectly.
@@ -76,13 +79,9 @@ import com.google.common.collect.Maps;
  * @author Kristian
  */
 public class PacketContainer implements Serializable {
+	private static final long serialVersionUID = 3;
 	
-	/**
-	 * Generated by Eclipse.
-	 */
-	private static final long serialVersionUID = 2074805748222377230L;
-	
-	protected int id;
+	protected PacketType type;
 	protected transient Object handle;
 
 	// Current structure modifier
@@ -118,15 +117,15 @@ public class PacketContainer implements Serializable {
 			build();
 	
 	// Packets that cannot be cloned by our default deep cloner
-	private static final IntegerSet CLONING_UNSUPPORTED = new IntegerSet(Packets.PACKET_COUNT, 
-			Arrays.asList(Packets.Server.UPDATE_ATTRIBUTES));
+	private static final Set<PacketType> CLONING_UNSUPPORTED = Sets.newHashSet(
+		PacketType.Play.Server.UPDATE_ATTRIBUTES, PacketType.Status.Server.KICK_DISCONNECT);
 	
 	/**
 	 * Creates a packet container for a new packet.
 	 * @param id - ID of the packet to create.
 	 */
 	public PacketContainer(int id) {
-		this(id, StructureCache.newPacket(id));
+		this(PacketType.findLegacy(id), StructureCache.newPacket(PacketType.findLegacy(id)));
 	}
 	
 	/**
@@ -135,7 +134,7 @@ public class PacketContainer implements Serializable {
 	 * @param handle - contained packet.
 	 */
 	public PacketContainer(int id, Object handle) {
-		this(id, handle, StructureCache.getStructure(id).withTarget(handle));
+		this(PacketType.findLegacy(id), handle);
 	}
 	
 	/**
@@ -145,10 +144,39 @@ public class PacketContainer implements Serializable {
 	 * @param structure - structure modifier.
 	 */
 	public PacketContainer(int id, Object handle, StructureModifier<Object> structure) {
+		this(PacketType.findLegacy(id), handle, structure);
+	}
+	
+	/**
+	 * Creates a packet container for a new packet.
+	 * @param type - the type of the packet to create.
+	 */
+	public PacketContainer(PacketType type) {
+		this(type, StructureCache.newPacket(type));
+	}
+	
+	/**
+	 * Creates a packet container for an existing packet.
+	 * @param id - ID of the given packet.
+	 * @param handle - contained packet.
+	 */
+	public PacketContainer(PacketType type, Object handle) {
+		this(type, handle, StructureCache.getStructure(type).withTarget(handle));
+	}
+	
+	/**
+	 * Creates a packet container for an existing packet.
+	 * @param id - ID of the given packet.
+	 * @param handle - contained packet.
+	 * @param structure - structure modifier.
+	 */
+	public PacketContainer(PacketType type, Object handle, StructureModifier<Object> structure) {
 		if (handle == null)
 			throw new IllegalArgumentException("handle cannot be null.");
+		if (type == null)
+			throw new IllegalArgumentException("type cannot be null.");
 		
-		this.id = id;
+		this.type = type;
 		this.handle = handle;
 		this.structureModifier = structure;
 	}
@@ -440,10 +468,21 @@ public class PacketContainer implements Serializable {
 	
 	/**
 	 * Retrieves the ID of this packet.
+	 * <p>
+	 * Deprecated: Use {@link #getType()} instead.
 	 * @return Packet ID.
 	 */
+	@Deprecated
 	public int getID() {
-		return id;
+		return type.getLegacyId();
+	}
+	
+	/**
+	 * Retrieve the packet type of this packet.
+	 * @return The packet type.
+	 */
+	public PacketType getType() {
+		return type;
 	}
 	
 	/**
@@ -473,12 +512,12 @@ public class PacketContainer implements Serializable {
 		Object clonedPacket = null; 
 		
 		// Fall back on the alternative (but slower) method of reading and writing back the packet
-		if (CLONING_UNSUPPORTED.contains(id)) {
+		if (CLONING_UNSUPPORTED.contains(type)) {
 			clonedPacket = SerializableCloner.clone(this).getHandle();
 		} else {
 			clonedPacket = DEEP_CLONER.clone(getHandle());
 		}
-		return new PacketContainer(getID(), clonedPacket);
+		return new PacketContainer(getType(), clonedPacket);
 	}
 		
 	// To save space, we'll skip copying the inflated buffers in packet 51 and 56
@@ -511,9 +550,19 @@ public class PacketContainer implements Serializable {
 		output.writeBoolean(handle != null);
 
 		try {
+			if (MinecraftReflection.isUsingNetty()) {
+				ByteBuf buffer = createPacketBuffer();
+				MinecraftMethods.getPacketWriteByteBufMethod().invoke(handle, buffer);
+				
+				output.writeInt(buffer.readableBytes());
+				buffer.readBytes(output, buffer.readableBytes());
+				
+			} else {
 				// Call the write-method
+				output.writeInt(-1);
 				getMethodLazily(writeMethods, handle.getClass(), "write", DataOutput.class).
 					invoke(handle, new DataOutputStream(output));	
+			}
 		
 		} catch (IllegalArgumentException e) {
 			throw new IOException("Minecraft packet doesn't support DataOutputStream", e);
@@ -529,19 +578,28 @@ public class PacketContainer implements Serializable {
 		input.defaultReadObject();
 		
 		// Get structure modifier
-		structureModifier = StructureCache.getStructure(id);
+		structureModifier = StructureCache.getStructure(type);
 
 	    // Don't read NULL packets
 	    if (input.readBoolean()) {
 	    	
 	    	// Create a default instance of the packet
-	    	handle = StructureCache.newPacket(id);
+	    	handle = StructureCache.newPacket(type);
 	    	
 			// Call the read method
 			try {
+				if (MinecraftReflection.isUsingNetty()) {
+					ByteBuf buffer = createPacketBuffer();
+					buffer.writeBytes(input, input.readInt());
+					
+					MinecraftMethods.getPacketReadByteBufMethod().invoke(handle, buffer);
+				} else {
+					if (input.readInt() != -1)
+						throw new IllegalArgumentException("Cannot load a packet from 1.7.2 in 1.6.4.");
+					
 					getMethodLazily(readMethods, handle.getClass(), "read", DataInput.class).
 						invoke(handle, new DataInputStream(input));
-				
+				}
 			} catch (IllegalArgumentException e) {
 				throw new IOException("Minecraft packet doesn't support DataInputStream", e);
 			} catch (IllegalAccessException e) {
@@ -555,6 +613,14 @@ public class PacketContainer implements Serializable {
 	    }
 	}
 	
+	/**
+	 * Construct a new packet data serializer.
+	 * @return The packet data serializer.
+	 */
+	private ByteBuf createPacketBuffer() {
+		return MinecraftReflection.getPacketDataSerializer(UnpooledByteBufAllocator.DEFAULT.buffer());
+	}
+	
 	/**
 	 * Retrieve the cached method concurrently.
 	 * @param lookup - a lazy lookup cache.

ProtocolLib/src/main/java/com/comphenix/protocol/events/PacketEvent.java

@@ -25,6 +25,7 @@ import java.util.EventObject;
 import org.bukkit.entity.Player;
 import org.bukkit.event.Cancellable;
 
+import com.comphenix.protocol.PacketType;
 import com.comphenix.protocol.async.AsyncMarker;
 import com.google.common.base.Preconditions;
 
@@ -156,12 +157,23 @@ public class PacketEvent extends EventObject implements Cancellable {
 	
 	/**
 	 * Retrieves the packet ID.
+	 * <p>
+	 * Deprecated: Use {@link #getPacketType()} instead.
 	 * @return The current packet ID.
 	 */
+	@Deprecated
 	public int getPacketID() {
 		return packet.getID();
 	}
 	
+	/**
+	 * Retrieve the packet type.
+	 * @return The type.
+	 */
+	public PacketType getPacketType() {
+		return packet.getType();
+	}
+	
 	/**
 	 * Retrieves whether or not the packet should be cancelled.
 	 * @return TRUE if it should be cancelled, FALSE otherwise.
@@ -181,7 +193,7 @@ public class PacketEvent extends EventObject implements Cancellable {
 		if (networkMarker == null) {
 			if (isServerPacket()) {
 				networkMarker = new NetworkMarker(
-					serverPacket ? ConnectionSide.SERVER_SIDE : ConnectionSide.CLIENT_SIDE, null);
+					serverPacket ? ConnectionSide.SERVER_SIDE : ConnectionSide.CLIENT_SIDE, (byte[]) null);
 			} else {
 				throw new IllegalStateException("Add the option ListenerOptions.INTERCEPT_INPUT_BUFFER to your listener.");
 			}

ProtocolLib/src/main/java/com/comphenix/protocol/injector/BukkitUnwrapper.java

@@ -45,6 +45,8 @@ import com.google.common.primitives.Primitives;
  * @author Kristian
  */
 public class BukkitUnwrapper implements Unwrapper {
+	private static BukkitUnwrapper DEFAULT;
+
 	public static final ReportType REPORT_ILLEGAL_ARGUMENT = new ReportType("Illegal argument.");
 	public static final ReportType REPORT_SECURITY_LIMITATION = new ReportType("Security limitation.");
 	public static final ReportType REPORT_CANNOT_FIND_UNWRAP_METHOD = new ReportType("Cannot find method.");
@@ -56,6 +58,20 @@ public class BukkitUnwrapper implements Unwrapper {
 	// The current error reporter
 	private final ErrorReporter reporter;
 	
+	/**
+	 * Retrieve the default instance of the Bukkit unwrapper.
+	 * @return The default instance.
+	 */
+	public static BukkitUnwrapper getInstance() {
+		ErrorReporter currentReporter = ProtocolLibrary.getErrorReporter();
+		
+		// Also recreate the unwrapper if the error reporter has changed
+		if (DEFAULT == null || DEFAULT.reporter != currentReporter) {
+			DEFAULT = new BukkitUnwrapper(currentReporter);
+		}
+		return DEFAULT;
+	}
+	
 	/**
 	 * Construct a new Bukkit unwrapper with ProtocolLib's default error reporter.
 	 */

ProtocolLib/src/main/java/com/comphenix/protocol/injector/ListenerInvoker.java

@@ -44,6 +44,7 @@ public interface ListenerInvoker {
 	 * @param packet - the packet.
 	 * @return The packet ID.
 	 */
+	@Deprecated
 	public abstract int getPacketID(Object packet);
 
 	/**

ProtocolLib/src/main/java/com/comphenix/protocol/injector/LoginPackets.java

@@ -2,6 +2,7 @@ package com.comphenix.protocol.injector;
 
 import org.bukkit.Bukkit;
 
+import com.comphenix.protocol.PacketType;
 import com.comphenix.protocol.Packets;
 import com.comphenix.protocol.concurrency.IntegerSet;
 import com.comphenix.protocol.events.ConnectionSide;
@@ -17,6 +18,7 @@ class LoginPackets {
 	private IntegerSet clientSide = new IntegerSet(Packets.PACKET_COUNT);
 	private IntegerSet serverSide = new IntegerSet(Packets.PACKET_COUNT);
 	
+	@SuppressWarnings("deprecation")
 	public LoginPackets(MinecraftVersion version) {
 		// Ordinary login
 		clientSide.add(Packets.Client.HANDSHAKE);
@@ -55,6 +57,7 @@ class LoginPackets {
 	 * @param side - the direction.
 	 * @return TRUE if it may, FALSE otherwise.
 	 */
+	@Deprecated
 	public boolean isLoginPacket(int packetId, ConnectionSide side) {
 		switch (side) {
 			case CLIENT_SIDE:
@@ -68,4 +71,16 @@ class LoginPackets {
 				throw new IllegalArgumentException("Unknown connection side: " + side);
 		}
 	}	
+	
+	/**
+	 * Determine if a given packet may be sent during login.
+	 * @param type - the packet type.
+	 * @return TRUE if it may, FALSE otherwise.
+	 */
+	public boolean isLoginPacket(PacketType type) {
+		return PacketType.Login.Client.getInstance().hasMember(type) || 
+			   PacketType.Login.Server.getInstance().hasMember(type) ||
+			   PacketType.Status.Client.getInstance().hasMember(type) || 
+			   PacketType.Status.Server.getInstance().hasMember(type);
+	}
 }

ProtocolLib/src/main/java/com/comphenix/protocol/injector/PacketConstructor.java

@@ -21,6 +21,7 @@ import java.lang.reflect.Constructor;
 import java.lang.reflect.InvocationTargetException;
 import java.util.List;
 
+import com.comphenix.protocol.PacketType;
 import com.comphenix.protocol.error.RethrowErrorReporter;
 import com.comphenix.protocol.events.PacketContainer;
 import com.comphenix.protocol.injector.packet.PacketRegistry;
@@ -36,7 +37,6 @@ import com.google.common.primitives.Primitives;
  *
  */
 public class PacketConstructor {
-
 	/**
 	 * A packet constructor that automatically converts Bukkit types to their NMS conterpart. 
 	 * <p>
@@ -48,7 +48,7 @@ public class PacketConstructor {
 	private Constructor<?> constructorMethod;
 	
 	// The packet ID
-	private int packetID;
+	private PacketType type;
 	
 	// Used to unwrap Bukkit objects
 	private List<Unwrapper> unwrappers;
@@ -62,8 +62,8 @@ public class PacketConstructor {
 		this.unwrappers.addAll(BukkitConverters.getUnwrappers()); 
 	}
 	
-	private PacketConstructor(int packetID, Constructor<?> constructorMethod, List<Unwrapper> unwrappers, Unwrapper[] paramUnwrapper) {
-		this.packetID = packetID;
+	private PacketConstructor(PacketType type, Constructor<?> constructorMethod, List<Unwrapper> unwrappers, Unwrapper[] paramUnwrapper) {
+		this.type = type;
 		this.constructorMethod = constructorMethod;
 		this.unwrappers = unwrappers;
 		this.paramUnwrapper = paramUnwrapper;
@@ -75,10 +75,21 @@ public class PacketConstructor {
 	
 	/**
 	 * Retrieve the id of the packets this constructor creates.
+	 * <p>
+	 * Deprecated: Use {@link #getType()} instead.
 	 * @return The ID of the packets this constructor will create.
 	 */
+	@Deprecated
 	public int getPacketID() {
-		return packetID;
+		return type.getLegacyId();
+	}
+	
+	/**
+	 * Retrieve the type of the packets this constructor creates.
+	 * @return The type of the created packets.
+	 */
+	public PacketType getType() {
+		return type;
 	}
 	
 	/**
@@ -87,19 +98,35 @@ public class PacketConstructor {
 	 * @return A constructor with a different set of unwrappers.
 	 */
 	public PacketConstructor withUnwrappers(List<Unwrapper> unwrappers) {
-		return new PacketConstructor(packetID, constructorMethod, unwrappers, paramUnwrapper);
+		return new PacketConstructor(type, constructorMethod, unwrappers, paramUnwrapper);
+	}
+
+	/**
+	 * Create a packet constructor that creates packets using the given ID.
+	 * <p>
+	 * Note that if you pass a Class<?> as a value, it will use its type directly.
+	 * <p>
+	 * Deprecated: Use {@link #withPacket(PacketType, Object[])} instead.
+	 * @param id - legacy (1.6.4) packet ID.
+	 * @param values - the values that will match each parameter in the desired constructor.
+	 * @return A packet constructor with these types.
+	 * @throws IllegalArgumentException If no packet constructor could be created with these types.
+	 */
+	@Deprecated
+	public PacketConstructor withPacket(int id, Object[] values) {
+		return withPacket(PacketType.findLegacy(id), values);
 	}
 	
 	/**
 	 * Create a packet constructor that creates packets using the given types.
 	 * <p>
 	 * Note that if you pass a Class<?> as a value, it will use its type directly.
-	 * @param id - packet ID.
+	 * @param type - the type of the packet to create.
 	 * @param values - the values that will match each parameter in the desired constructor.
 	 * @return A packet constructor with these types.
 	 * @throws IllegalArgumentException If no packet constructor could be created with these types.
 	 */
-	public PacketConstructor withPacket(int id, Object[] values) {
+	public PacketConstructor withPacket(PacketType type, Object[] values) {
 		Class<?>[] types = new Class<?>[values.length];
 		Throwable lastException = null;
 		Unwrapper[] paramUnwrapper = new Unwrapper[values.length];		
@@ -131,11 +158,10 @@ public class PacketConstructor {
 				types[i] = Object.class;
 			}
 		}
-		
-		Class<?> packetType = PacketRegistry.getPacketClassFromID(id, true);
+		Class<?> packetType = PacketRegistry.getPacketClassFromType(type, true);
 		
 		if (packetType == null)
-			throw new IllegalArgumentException("Could not find a packet by the id " + id);
+			throw new IllegalArgumentException("Could not find a packet by the type " + type);
 		
 		// Find the correct constructor
 		for (Constructor<?> constructor : packetType.getConstructors()) {
@@ -143,10 +169,9 @@ public class PacketConstructor {
 
 			if (isCompatible(types, params)) {
 				// Right, we've found our type
-				return new PacketConstructor(id, constructor, unwrappers, paramUnwrapper);
+				return new PacketConstructor(type, constructor, unwrappers, paramUnwrapper);
 			}
 		}
-		
 		throw new IllegalArgumentException("No suitable constructor could be found.", lastException);
 	}
 	
@@ -168,7 +193,7 @@ public class PacketConstructor {
 			}
 			
 			Object nmsPacket = constructorMethod.newInstance(values);
-			return new PacketContainer(packetID, nmsPacket);
+			return new PacketContainer(type, nmsPacket);
 			
 		} catch (IllegalArgumentException e) {
 			throw e;

ProtocolLib/src/main/java/com/comphenix/protocol/injector/PacketFilterManager.java

@@ -57,6 +57,7 @@ import com.comphenix.protocol.error.ErrorReporter;
 import com.comphenix.protocol.error.Report;
 import com.comphenix.protocol.error.ReportType;
 import com.comphenix.protocol.events.*;
+import com.comphenix.protocol.injector.netty.NettyProtocolInjector;
 import com.comphenix.protocol.injector.packet.InterceptWritePacket;
 import com.comphenix.protocol.injector.packet.PacketInjector;
 import com.comphenix.protocol.injector.packet.PacketInjectorBuilder;
@@ -181,6 +182,9 @@ public final class PacketFilterManager implements ProtocolManager, ListenerInvok
 	// Spigot listener, if in use
 	private SpigotPacketInjector spigotInjector;
 	
+	// Netty injector (for 1.7.2)
+	private NettyProtocolInjector nettyInjector;
+	
 	// Plugin verifier
 	private PluginVerifier pluginVerifier;
 	
@@ -231,7 +235,12 @@ public final class PacketFilterManager implements ProtocolManager, ListenerInvok
 		this.interceptWritePacket = new InterceptWritePacket(classLoader, reporter);
 		
 		// Use the correct injection type
-		if (builder.isNettyEnabled()) {
+		if (MinecraftReflection.isUsingNetty()) {
+			this.nettyInjector = new NettyProtocolInjector(this);
+			this.playerInjection = nettyInjector.getPlayerInjector();
+			this.packetInjector = nettyInjector.getPacketInjector();
+			
+		} else if (builder.isNettyEnabled()) {
 			this.spigotInjector = new SpigotPacketInjector(classLoader, reporter, this, server);
 			this.playerInjection = spigotInjector.getPlayerHandler();
 			this.packetInjector = spigotInjector.getPacketInjector();
@@ -881,6 +890,8 @@ public final class PacketFilterManager implements ProtocolManager, ListenerInvok
 	public void registerEvents(PluginManager manager, final Plugin plugin) {
 		if (spigotInjector != null && !spigotInjector.register(plugin))
 			throw new IllegalArgumentException("Spigot has already been registered.");
+		if (nettyInjector != null)
+			nettyInjector.inject();
 		
 		try {
 			manager.registerEvents(new Listener() {
@@ -1009,7 +1020,6 @@ public final class PacketFilterManager implements ProtocolManager, ListenerInvok
 	// Yes, this is crazy.
 	@SuppressWarnings({ "unchecked", "rawtypes" })
 	private void registerOld(PluginManager manager, final Plugin plugin) {
-		
 		try {
 			ClassLoader loader = manager.getClass().getClassLoader();
 			

ProtocolLib/src/main/java/com/comphenix/protocol/injector/StructureCache.java

@@ -22,6 +22,7 @@ import java.util.Set;
 import java.util.concurrent.ConcurrentHashMap;
 import java.util.concurrent.ConcurrentMap;
 
+import com.comphenix.protocol.PacketType;
 import com.comphenix.protocol.injector.packet.PacketRegistry;
 import com.comphenix.protocol.reflect.StructureModifier;
 import com.comphenix.protocol.reflect.compiler.BackgroundCompiler;
@@ -35,19 +36,31 @@ import com.comphenix.protocol.utility.MinecraftReflection;
  */
 public class StructureCache {
 	// Structure modifiers
-	private static ConcurrentMap<Integer, StructureModifier<Object>> structureModifiers = 
-			new ConcurrentHashMap<Integer, StructureModifier<Object>>();
+	private static ConcurrentMap<PacketType, StructureModifier<Object>> structureModifiers = 
+			new ConcurrentHashMap<PacketType, StructureModifier<Object>>();
 	
-	private static Set<Integer> compiling = new HashSet<Integer>();
+	private static Set<PacketType> compiling = new HashSet<PacketType>();
 	
 	/**
-	 * Creates an empty Minecraft packet of the given ID.
-	 * @param id - packet ID.
+	 * Creates an empty Minecraft packet of the given id.
+	 * <p>
+	 * Decreated: Use {@link #newPacket(PacketType)} instead.
+	 * @param legacyId - legacy (1.6.4) packet id.
 	 * @return Created packet.
 	 */
-	public static Object newPacket(int id) {
+	@Deprecated
+	public static Object newPacket(int legacyId) {
+		return newPacket(PacketType.findLegacy(legacyId));
+	}
+	
+	/**
+	 * Creates an empty Minecraft packet of the given type.
+	 * @param type - packet type.
+	 * @return Created packet.
+	 */
+	public static Object newPacket(PacketType type) {
 		try {
-			return PacketRegistry.getPacketClassFromID(id, true).newInstance();
+			return PacketRegistry.getPacketClassFromType(type, true).newInstance();
 		} catch (InstantiationException e) {
 			return null;
 		} catch (IllegalAccessException e) {
@@ -57,12 +70,24 @@ public class StructureCache {
 	
 	/**
 	 * Retrieve a cached structure modifier for the given packet id.
-	 * @param id - packet ID.
+	 * <p>
+	 * Deprecated: Use {@link #getStructure(PacketType)} instead.
+	 * @param legacyId - the legacy (1.6.4) packet ID.
 	 * @return A structure modifier.
 	 */
-	public static StructureModifier<Object> getStructure(int id) {
+	@Deprecated
+	public static StructureModifier<Object> getStructure(int legacyId) {
+		return getStructure(PacketType.findLegacy(legacyId));
+	}
+	
+	/**
+	 * Retrieve a cached structure modifier for the given packet type.
+	 * @param type - packet type.
+	 * @return A structure modifier.
+	 */
+	public static StructureModifier<Object> getStructure(PacketType type) {
 		// Compile structures by default
-		return getStructure(id, true);
+		return getStructure(type, true);
 	}
 	
 	/**
@@ -83,26 +108,38 @@ public class StructureCache {
 	 */
 	public static StructureModifier<Object> getStructure(Class<?> packetType, boolean compile) {
 		// Get the ID from the class
-		return getStructure(PacketRegistry.getPacketID(packetType), compile);
+		return getStructure(PacketRegistry.getPacketType(packetType), compile);
 	}
 	
 	/**
-	 * Retrieve a cached structure modifier for the given packet id.
-	 * @param id - packet ID.
+	 * Retrieve a cached structure modifier for the given packet ID.
+	 * <p>
+	 * Deprecated: Use {@link #getStructure(PacketType, boolean)} instead.
+	 * @param legacyId - the legacy (1.6.4) packet ID.
 	 * @param compile - whether or not to asynchronously compile the structure modifier.
 	 * @return A structure modifier.
 	 */
-	public static StructureModifier<Object> getStructure(int id, boolean compile) {
+	@Deprecated
+	public static StructureModifier<Object> getStructure(final int legacyId, boolean compile) {
+		return getStructure(PacketType.findLegacy(legacyId), compile);
+	}
 	
-		StructureModifier<Object> result = structureModifiers.get(id);
+	/**
+	 * Retrieve a cached structure modifier for the given packet type.
+	 * @param type - packet type.
+	 * @param compile - whether or not to asynchronously compile the structure modifier.
+	 * @return A structure modifier.
+	 */
+	public static StructureModifier<Object> getStructure(final PacketType type, boolean compile) {
+		StructureModifier<Object> result = structureModifiers.get(type);
 
 		// We don't want to create this for every lookup
 		if (result == null) {
 			// Use the vanilla class definition
 			final StructureModifier<Object> value = new StructureModifier<Object>(
-					PacketRegistry.getPacketClassFromID(id, true), MinecraftReflection.getPacketClass(), true);
+					PacketRegistry.getPacketClassFromType(type, true), MinecraftReflection.getPacketClass(), true);
 			
-			result = structureModifiers.putIfAbsent(id, value);
+			result = structureModifiers.putIfAbsent(type, value);
 			
 			// We may end up creating multiple modifiers, but we'll agree on which to use
 			if (result == null) {
@@ -114,21 +151,19 @@ public class StructureCache {
 		if (compile && !(result instanceof CompiledStructureModifier)) {
 			// Compilation is many orders of magnitude slower than synchronization
 			synchronized (compiling) {
-				final int idCopy = id;
 				final BackgroundCompiler compiler = BackgroundCompiler.getInstance();
 				
-				if (!compiling.contains(id) && compiler != null) {
+				if (!compiling.contains(type) && compiler != null) {
 					compiler.scheduleCompilation(result, new CompileListener<Object>() {
 						@Override
 						public void onCompiled(StructureModifier<Object> compiledModifier) {
-							structureModifiers.put(idCopy, compiledModifier);
+							structureModifiers.put(type, compiledModifier);
 						}
 					});
-					compiling.add(id);
+					compiling.add(type);
 				}
 			}
 		}
-		
 		return result;
 	}
 }

ProtocolLib/src/main/java/com/comphenix/protocol/injector/netty/BootstrapList.java

@@ -0,0 +1,92 @@
+package com.comphenix.protocol.injector.netty;
+
+import java.util.Collection;
+import java.util.List;
+
+import com.google.common.collect.ForwardingList;
+import com.google.common.collect.Lists;
+
+// Hopefully, CB won't version these as well
+import net.minecraft.util.io.netty.channel.ChannelFuture;
+import net.minecraft.util.io.netty.channel.ChannelHandler;
+
+class BootstrapList extends ForwardingList<ChannelFuture> {
+	private List<ChannelFuture> delegate;
+	private ChannelHandler handler;
+	
+	/**
+	 * Construct a new bootstrap list.
+	 * @param delegate - the delegate.
+	 * @param handler - the channel handler to add.
+	 */
+	public BootstrapList(List<ChannelFuture> delegate, ChannelHandler handler) {
+		this.delegate = delegate;
+		this.handler = handler;
+		
+		// Process all existing bootstraps
+		for (ChannelFuture future : this)
+			processBootstrap(future);
+	}
+
+	@Override
+	protected List<ChannelFuture> delegate() {
+		return delegate;
+	}
+	
+	@Override
+	public boolean add(ChannelFuture element) {
+		processBootstrap(element);
+		return super.add(element);
+	}
+	
+	@Override
+	public boolean addAll(Collection<? extends ChannelFuture> collection) {
+		List<? extends ChannelFuture> copy = Lists.newArrayList(collection);
+		
+		// Process the collection before we pass it on
+		for (ChannelFuture future : copy) {
+			processBootstrap(future);
+		}
+		return super.addAll(copy);
+	}
+	
+	@Override
+	public ChannelFuture set(int index, ChannelFuture element) {
+		ChannelFuture old = super.set(index, element);
+		
+		// Handle the old future, and the newly inserted future
+		if (old != element) {
+			if (old != null) {
+				unprocessBootstrap(old);
+			}
+			if (element != null) {
+				processBootstrap(element);
+			}
+		}
+		return old;
+	}
+	
+	/**
+	 * Process a single channel future.
+	 * @param future - the future.
+	 */
+	protected void processBootstrap(ChannelFuture future) {
+		future.channel().pipeline().addLast(handler);
+	}
+	
+	/**
+	 * Revert any changes we made to the channel future.
+	 * @param future - the future.
+	 */
+	protected void unprocessBootstrap(ChannelFuture future) {
+		future.channel().pipeline().remove(handler);
+	}
+	
+	/**
+	 * Close and revert all changes.
+	 */
+	public void close() {
+		for (ChannelFuture future : this)
+			unprocessBootstrap(future);
+	}
+}

ProtocolLib/src/main/java/com/comphenix/protocol/injector/netty/ChannelInjector.java

@@ -0,0 +1,538 @@
+package com.comphenix.protocol.injector.netty;
+
+import java.lang.reflect.InvocationTargetException;
+import java.net.Socket;
+import java.net.SocketAddress;
+import java.util.Collections;
+import java.util.List;
+import java.util.Map.Entry;
+import java.util.Set;
+import java.util.concurrent.ConcurrentMap;
+
+import net.minecraft.util.io.netty.buffer.ByteBuf;
+import net.minecraft.util.io.netty.channel.Channel;
+import net.minecraft.util.io.netty.channel.ChannelHandler;
+import net.minecraft.util.io.netty.channel.ChannelHandlerContext;
+import net.minecraft.util.io.netty.channel.socket.SocketChannel;
+import net.minecraft.util.io.netty.handler.codec.ByteToMessageDecoder;
+import net.minecraft.util.io.netty.handler.codec.MessageToByteEncoder;
+import net.minecraft.util.io.netty.util.concurrent.GenericFutureListener;
+import net.sf.cglib.proxy.Factory;
+
+import org.bukkit.Bukkit;
+import org.bukkit.entity.Player;
+
+import com.comphenix.protocol.PacketType.Protocol;
+import com.comphenix.protocol.events.ConnectionSide;
+import com.comphenix.protocol.events.NetworkMarker;
+import com.comphenix.protocol.events.PacketEvent;
+import com.comphenix.protocol.events.PacketOutputHandler;
+import com.comphenix.protocol.injector.packet.PacketRegistry;
+import com.comphenix.protocol.injector.server.SocketInjector;
+import com.comphenix.protocol.injector.server.TemporaryPlayerFactory;
+import com.comphenix.protocol.reflect.FuzzyReflection;
+import com.comphenix.protocol.reflect.VolatileField;
+import com.comphenix.protocol.reflect.FuzzyReflection.FieldAccessor;
+import com.comphenix.protocol.reflect.FuzzyReflection.MethodAccessor;
+import com.comphenix.protocol.utility.MinecraftFields;
+import com.comphenix.protocol.utility.MinecraftMethods;
+import com.comphenix.protocol.utility.MinecraftReflection;
+import com.google.common.base.Preconditions;
+import com.google.common.collect.MapMaker;
+
+/**
+ * Represents a channel injector.
+ * @author Kristian
+ */
+class ChannelInjector extends ByteToMessageDecoder {
+	/**
+	 * Represents a listener for received or sent packets.
+	 * @author Kristian
+	 */
+	interface ChannelListener {
+		/**
+		 * Invoked when a packet is being sent to the client.
+		 * <p>
+		 * This is invoked on the main thread.
+		 * @param injector - the channel injector.
+		 * @param packet - the packet.
+		 * @param marker - the associated network marker, if any.
+		 * @return The new packet, if it should be changed, or NULL to cancel.
+		 */
+		public Object onPacketSending(ChannelInjector injector, Object packet, NetworkMarker marker);
+		
+		/**
+		 * Invoked when a packet is being received from a client.
+		 * <p>
+		 * This is invoked on an asynchronous worker thread.
+		 * @param injector - the channel injector.
+		 * @param packet - the packet.
+		 * @param marker - the associated network marker, if any.
+		 * @return The new packet, if it should be changed, or NULL to cancel.
+		 */
+		public Object onPacketReceiving(ChannelInjector injector, Object packet, NetworkMarker marker);
+		
+		/**
+		 * Determine if we need the buffer data of a given client side packet.
+		 * @param packetId - the packet Id.
+		 * @return TRUE if we do, FALSE otherwise.
+		 */
+		public boolean includeBuffer(int packetId);
+	}
+	
+	private static final ConcurrentMap<Player, ChannelInjector> cachedInjector = new MapMaker().weakKeys().makeMap();
+	
+	// The player, or temporary player
+	private Player player;
+	
+	// The player connection
+	private Object playerConnection;
+
+	// For retrieving the protocol
+	private FieldAccessor protocolAccessor;
+	
+	// The current network manager and channel
+	private final Object networkManager;
+	private final Channel originalChannel;
+	private VolatileField channelField;
+
+	// Known network markers
+	private ConcurrentMap<Object, NetworkMarker> packetMarker = new MapMaker().weakKeys().makeMap();
+	private ConcurrentMap<NetworkMarker, PacketEvent> markerEvent = new MapMaker().weakKeys().makeMap();
+	
+	// Packets to ignore
+	private Set<Object> ignoredPackets = Collections.newSetFromMap(new MapMaker().weakKeys().<Object, Boolean>makeMap());
+	
+	// Other handlers
+	private ByteToMessageDecoder vanillaDecoder;
+	private MessageToByteEncoder<Object> vanillaEncoder;
+	private MethodAccessor decodeBuffer;
+	private MethodAccessor encodeBuffer;
+	
+	// Our extra handler
+	private MessageToByteEncoder<Object> protocolEncoder;
+	
+	// The channel listener
+	private ChannelListener channelListener;
+	
+	// Closed
+	private boolean injected;
+	private boolean closed;
+	
+	/**
+	 * Construct a new channel injector.
+	 * @param player - the current player, or temporary player.
+	 * @param networkManager - its network manager.
+	 * @param channel - its channel.
+	 */
+	private ChannelInjector(Player player, Object networkManager, Channel channel, ChannelListener channelListener) {
+		this.player =  Preconditions.checkNotNull(player, "player cannot be NULL");
+		this.networkManager =  Preconditions.checkNotNull(networkManager, "networkMananger cannot be NULL");
+		this.originalChannel = Preconditions.checkNotNull(channel, "channel cannot be NULL");
+		this.channelListener = Preconditions.checkNotNull(channelListener, "channelListener cannot be NULL");
+		
+		// Get the channel field
+		this.channelField = new VolatileField(
+			FuzzyReflection.fromObject(networkManager, true).
+			getFieldByType("channel", Channel.class), networkManager);
+	}
+	
+	/**
+	 * Construct or retrieve a channel injector from an existing Bukkit player.
+	 * @param player - the existing Bukkit player.
+	 * @return A new injector, or an existing injector associated with this player.
+	 */
+	public static ChannelInjector fromPlayer(Player player, ChannelListener listener) {
+		ChannelInjector injector = cachedInjector.get(player);
+		
+		if (injector != null)
+			return injector;
+		
+		Object networkManager = MinecraftFields.getNetworkManager(player);
+		Channel channel = FuzzyReflection.getFieldValue(networkManager, Channel.class, true);
+		
+		// See if a channel has already been created
+		injector = (ChannelInjector) findChannelHandler(channel, ChannelInjector.class);
+		
+		if (injector != null) {
+			// Update the player instance
+			injector.player = player;
+		} else {
+			injector = new ChannelInjector(player, networkManager, channel, listener);
+		}
+		// Cache injector and return
+		cachedInjector.put(player, injector);
+		return injector;
+	}
+	
+	/**
+	 * Construct a new channel injector for the given channel.
+	 * @param channel - the channel.
+	 * @param playerFactory - a temporary player creator.
+	 * @return The channel injector.
+	 */
+	public static ChannelInjector fromChannel(Channel channel, ChannelListener listener, TemporaryPlayerFactory playerFactory) {
+		Object networkManager = findNetworkManager(channel);	
+		Player temporaryPlayer = playerFactory.createTemporaryPlayer(Bukkit.getServer());
+		ChannelInjector injector = new ChannelInjector(temporaryPlayer, networkManager, channel, listener);
+		
+		// Initialize temporary player
+		TemporaryPlayerFactory.setInjectorInPlayer(temporaryPlayer, new ChannelSocketInjector(injector));
+		return injector;
+	}
+	
+	/**
+	 * Inject the current channel.
+	 */
+	@SuppressWarnings("unchecked")
+	public boolean inject() {
+		synchronized (networkManager) {
+			if (originalChannel instanceof Factory)
+				return false;
+			
+			// Don't inject the same channel twice
+			if (findChannelHandler(originalChannel, ChannelInjector.class) != null) {
+				// Invalidate cache
+				if (player != null)
+					cachedInjector.remove(player);
+				return false;
+			}
+			
+			// Get the vanilla decoder, so we don't have to replicate the work
+			vanillaDecoder = (ByteToMessageDecoder) originalChannel.pipeline().get("decoder");
+			vanillaEncoder = (MessageToByteEncoder<Object>) originalChannel.pipeline().get("encoder");
+			decodeBuffer = FuzzyReflection.getMethodAccessor(vanillaDecoder.getClass(), 
+					"decode", ChannelHandlerContext.class, ByteBuf.class, List.class);
+			encodeBuffer = FuzzyReflection.getMethodAccessor(vanillaEncoder.getClass(),
+					"encode", ChannelHandlerContext.class, Object.class, ByteBuf.class);
+			
+			protocolEncoder = new MessageToByteEncoder<Object>() {
+				@Override
+				protected void encode(ChannelHandlerContext ctx, Object packet, ByteBuf output) throws Exception {
+					NetworkMarker marker = getMarker(output);
+					PacketEvent event = markerEvent.remove(marker);
+					
+					if (event != null && NetworkMarker.hasOutputHandlers(marker)) {
+						ByteBuf packetBuffer = ctx.alloc().buffer();
+						encodeBuffer.invoke(vanillaEncoder, ctx, packet, packetBuffer);
+						byte[] data = getBytes(packetBuffer);
+						
+						for (PacketOutputHandler handler : marker.getOutputHandlers()) {
+							handler.handle(event, data);
+						}
+						// Write the result
+						output.writeBytes(data);
+					}
+				}
+			};
+			
+			// Insert our handler - note that we replace the decoder with our own
+			originalChannel.pipeline().addBefore("decoder", "protocol_lib_decoder", this);
+			originalChannel.pipeline().addAfter("encoder", "protocol_lib_encoder", protocolEncoder);
+			
+			// Intercept all write methods
+			channelField.setValue(new ChannelProxy() {
+				@Override
+				protected Object onMessageWritten(Object message) {
+					return channelListener.onPacketSending(ChannelInjector.this, message, packetMarker.get(message));
+				}
+			}.asChannel(originalChannel));
+			
+			injected = true;
+			return true;
+		}
+	}
+	
+	/**
+	 * Close the current injector.
+	 */
+	public void close() {
+		if (!closed) {
+			closed = true;
+			
+			if (injected) {
+				originalChannel.pipeline().remove(this);
+				originalChannel.pipeline().remove(protocolEncoder);
+				channelField.revertValue();
+			}
+		}
+	}
+	
+	@Override
+	protected void decode(ChannelHandlerContext ctx, ByteBuf byteBuffer, List<Object> packets) throws Exception {
+		byteBuffer.markReaderIndex();
+		decodeBuffer.invoke(vanillaDecoder, ctx, byteBuffer, packets);
+		
+		if (packets.size() > 0) {
+			Object input = packets.get(0);
+			int id = PacketRegistry.getPacketID(input.getClass());
+			NetworkMarker marker = null;
+			
+			if (channelListener.includeBuffer(id)) {
+				byteBuffer.resetReaderIndex();
+				marker = new NetworkMarker(ConnectionSide.CLIENT_SIDE, getBytes(byteBuffer));
+			}
+			Object output = channelListener.onPacketReceiving(this, input, marker);
+			
+			// Handle packet changes
+			if (output == null)
+				packets.clear();
+			else if (output != input)
+				packets.set(0, output);
+		}
+	}
+	
+	/**
+	 * Retrieve every byte in the given byte buffer.
+	 * @param buffer - the buffer.
+	 * @return The bytes.
+	 */
+	private byte[] getBytes(ByteBuf buffer){
+		byte[] data = new byte[buffer.readableBytes()];
+		
+		buffer.readBytes(data);
+		return data;
+	}
+	
+	/**
+	 * Disconnect the current player.
+	 * @param message - the disconnect message, if possible.
+	 */
+	private void disconnect(String message) {
+		// If we're logging in, we can only close the channel
+		if (playerConnection == null || player instanceof Factory) {
+			originalChannel.disconnect();
+		} else {
+			// Call the disconnect method
+			try {
+				MinecraftMethods.getDisconnectMethod(playerConnection.getClass()).
+					invoke(playerConnection, message);
+			} catch (Exception e) {
+				throw new IllegalArgumentException("Unable to invoke disconnect method.", e);
+			}
+		}
+	}
+	
+	/**
+	 * Send a packet to a player's client.
+	 * @param packet - the packet to send.
+	 * @param marker - the network marker.
+	 * @param filtered - whether or not the packet is filtered.
+	 */
+	public void sendServerPacket(Object packet, NetworkMarker marker, boolean filtered) {
+		saveMarker(packet, marker);
+		
+		// Record if this packet should be ignored by most listeners
+		if (!filtered) {
+			ignoredPackets.add(packet);
+		}
+		
+		// Attempt to send the packet with NetworkMarker.handle(), or the PlayerConnection if its active
+		try {
+			if (player instanceof Factory) {
+				MinecraftMethods.getNetworkManagerHandleMethod().invoke(networkManager, packet, new GenericFutureListener[0]);
+			} else {
+				MinecraftMethods.getSendPacketMethod().invoke(getPlayerConnection(), packet);
+			}
+		} catch (Exception e) {
+			throw new RuntimeException("Unable to send server packet " + packet, e);
+		}
+	}
+	
+	/**
+	 * Recieve a packet on the server.
+	 * @param packet - the (NMS) packet to send.
+	 * @param marker - the network marker.
+	 * @param filtered - whether or not the packet is filtered.
+	 */
+	public void recieveClientPacket(Object packet, NetworkMarker marker, boolean filtered) {
+		saveMarker(packet, marker);
+	
+		if (!filtered) {
+			ignoredPackets.add(packet);
+		}
+		
+		try {
+			MinecraftMethods.getNetworkManagerReadPacketMethod().invoke(networkManager, null, packet);
+		} catch (Exception e) {
+			throw new IllegalArgumentException("Unable to recieve client packet " + packet, e);
+		}
+	}
+	
+	/**
+	 * Retrieve the current protocol state.
+	 * @return The current protocol.
+	 */
+	public Protocol getCurrentProtocol() {
+		if (protocolAccessor == null) {
+			protocolAccessor = FuzzyReflection.getFieldAccessor(
+					networkManager.getClass(), MinecraftReflection.getEnumProtocolClass(), true);
+		}
+		return Protocol.fromVanilla((Enum<?>) protocolAccessor.get(networkManager));
+	}
+	
+	/**
+	 * Retrieve the player connection of the current player.
+	 * @return The player connection.
+	 */
+	private Object getPlayerConnection() {
+		if (playerConnection == null) {
+			playerConnection = MinecraftFields.getPlayerConnection(player);
+		}
+		return playerConnection;
+	}
+	
+	/**
+	 * Undo the ignore status of a packet.
+	 * @param packet - the packet.
+	 * @return TRUE if the ignore status was undone, FALSE otherwise.
+	 */
+	public boolean unignorePacket(Object packet) {
+		return ignoredPackets.remove(packet);
+	}
+	
+	/**
+	 * Ignore the given packet.
+	 * @param packet - the packet to ignore.
+	 * @return TRUE if it was ignored, FALSE if it already is ignored.
+	 */
+	public boolean ignorePacket(Object packet) {
+		return ignoredPackets.add(packet);
+	}
+	
+	/**
+	 * Retrieve the network marker associated with a given packet.
+	 * @param packet - the packet.
+	 * @return The network marker.
+	 */
+	public NetworkMarker getMarker(Object packet) {
+		return packetMarker.get(packet);
+	}
+	
+	/**
+	 * Associate a given network marker with a specific packet.
+	 * @param packet - the NMS packet.
+	 * @param marker - the associated marker.
+	 */
+	public void saveMarker(Object packet, NetworkMarker marker) {
+		if (marker != null) {
+			packetMarker.put(packet, marker);
+		}
+	}
+	
+	/**
+	 * Associate a given network marker with a packet event.
+	 * @param marker - the marker.
+	 * @param event - the packet event
+	 */
+	public void saveEvent(NetworkMarker marker, PacketEvent event) {
+		if (marker != null) {
+			markerEvent.put(marker, event);
+		}
+	}
+		
+	/**
+	 * Find the network manager in a channel's pipeline.
+	 * @param channel - the channel.
+	 * @return The network manager.
+	 */
+	private static Object findNetworkManager(Channel channel) {
+		// Find the network manager
+		Object networkManager = findChannelHandler(channel, MinecraftReflection.getNetworkManagerClass());
+		
+		if (networkManager != null)
+			return networkManager;
+		throw new IllegalArgumentException("Unable to find NetworkManager in " + channel);
+	}
+	
+	/**
+	 * Find the first channel handler that is assignable to a given type.
+	 * @param channel - the channel.
+	 * @param clazz - the type.
+	 * @return The first handler, or NULL.
+	 */
+	private static ChannelHandler findChannelHandler(Channel channel, Class<?> clazz) {
+		for (Entry<String, ChannelHandler> entry : channel.pipeline()) {
+			if (clazz.isAssignableFrom(entry.getValue().getClass())) {
+				return entry.getValue();
+			}
+		}
+		return null;
+	}
+	
+	/**
+	 * Retrieve the current player or temporary player associated with the injector.
+	 * @return The current player.
+	 */
+	public Player getPlayer() {
+		return player;
+	}
+	
+	/**
+	 * Determine if the channel has already been injected.
+	 * @return TRUE if it has, FALSE otherwise.
+	 */
+	public boolean isInjected() {
+		return injected;
+	}
+	
+	/**
+	 * Determine if this channel has been closed and cleaned up.
+	 * @return TRUE if it has, FALSE otherwise.
+	 */
+	public boolean isClosed() {
+		return closed;
+	}
+	
+	/**
+	 * Represents a socket injector that foreards to the current channel injector.
+	 * @author Kristian
+	 */
+	private static class ChannelSocketInjector implements SocketInjector {
+		private final ChannelInjector injector;
+		
+		public ChannelSocketInjector(ChannelInjector injector) {
+			this.injector = injector;
+		}
+
+		@Override
+		public Socket getSocket() throws IllegalAccessException {
+			return NettySocketAdaptor.adapt((SocketChannel) injector.originalChannel);
+		}
+
+		@Override
+		public SocketAddress getAddress() throws IllegalAccessException {
+			return injector.originalChannel.localAddress();
+		}
+
+		@Override
+		public void disconnect(String message) throws InvocationTargetException {
+			injector.disconnect(message);
+		}
+
+		@Override
+		public void sendServerPacket(Object packet, NetworkMarker marker, boolean filtered) throws InvocationTargetException {
+			injector.sendServerPacket(packet, marker, filtered);
+		}
+
+		@Override
+		public Player getPlayer() {
+			return injector.player;
+		}
+
+		@Override
+		public Player getUpdatedPlayer() {
+			return injector.player;
+		}
+
+		@Override
+		public void transferState(SocketInjector delegate) {
+			// Do nothing
+		}
+
+		@Override
+		public void setUpdatedPlayer(Player updatedPlayer) {
+			injector.player = updatedPlayer;
+		}	
+	}
+}

ProtocolLib/src/main/java/com/comphenix/protocol/injector/netty/ChannelProxy.java

@@ -0,0 +1,57 @@
+package com.comphenix.protocol.injector.netty;
+
+import java.lang.reflect.Method;
+import java.util.List;
+import java.util.Set;
+
+import com.comphenix.protocol.reflect.FuzzyReflection;
+import com.comphenix.protocol.reflect.fuzzy.FuzzyMethodContract;
+
+import net.minecraft.util.com.google.common.collect.Sets;
+import net.minecraft.util.io.netty.channel.Channel;
+import net.sf.cglib.proxy.Enhancer;
+import net.sf.cglib.proxy.MethodInterceptor;
+import net.sf.cglib.proxy.MethodProxy;
+
+abstract class ChannelProxy {
+	private static Set<Method> WRITE_METHODS;
+	
+	/**
+	 * Retrieve the channel proxy object.
+	 * @param proxyInstance - the proxy instance object.
+	 * @return The channel proxy.
+	 */
+	public Channel asChannel(final Channel proxyInstance) {
+		// Simple way to match all the write methods
+		if (WRITE_METHODS == null) {
+			List<Method> writers = FuzzyReflection.fromClass(Channel.class).
+					getMethodList(FuzzyMethodContract.newBuilder().nameRegex("write.*").build());
+			WRITE_METHODS = Sets.newHashSet(writers);
+		}
+		
+		Enhancer enhancer = new Enhancer();
+		enhancer.setSuperclass(Channel.class);
+		enhancer.setCallback(new MethodInterceptor() {
+			@Override
+			public Object intercept(Object obj, Method method, Object[] args, MethodProxy proxy) throws Throwable {
+				if (WRITE_METHODS.contains(method)) {
+					args[0] = onMessageWritten(args[0]);
+					
+					// If we should skip this object
+					if (args[0] == null)
+						return null;
+				}
+				// Forward to proxy
+				return proxy.invoke(proxyInstance, args);
+			}
+		});
+		return (Channel) enhancer.create();
+	}
+	
+	/**
+	 * Invoked when a packet is being transmitted.
+	 * @param message - the packet to transmit.
+	 * @return The object to transmit.
+	 */
+	protected abstract Object onMessageWritten(Object message);
+}

ProtocolLib/src/main/java/com/comphenix/protocol/injector/netty/NettyProtocol.java

@@ -1,28 +0,0 @@
-package com.comphenix.protocol.injector.netty;
-
-import com.comphenix.protocol.utility.MinecraftReflection;
-
-/**
- * Represents a way of accessing the new netty Protocol enum.
- * @author Kristian
- */
-public class NettyProtocol {
-	private Class<?> enumProtocol;
-	
-	
-	
-	public NettyProtocol() {
-		enumProtocol = MinecraftReflection.getEnumProtocolClass();
-		
-		
-	}
-	
-	/**
-	 * Load the packet lookup tables in each protocol.
-	 */
-	private void initialize() {
-		for (Object protocol : enumProtocol.getEnumConstants()) {
-			
-		}
-	}
-}

ProtocolLib/src/main/java/com/comphenix/protocol/injector/netty/NettyProtocolInjector.java

@@ -0,0 +1,309 @@
+package com.comphenix.protocol.injector.netty;
+
+import java.io.InputStream;
+import java.lang.reflect.Field;
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+import java.net.InetSocketAddress;
+import java.util.List;
+import java.util.Set;
+import org.bukkit.Bukkit;
+import org.bukkit.entity.Player;
+
+import net.minecraft.util.io.netty.channel.Channel;
+import net.minecraft.util.io.netty.channel.ChannelFuture;
+import net.minecraft.util.io.netty.channel.ChannelHandler;
+import net.minecraft.util.io.netty.channel.ChannelHandlerContext;
+import net.minecraft.util.io.netty.channel.ChannelInboundHandler;
+import net.minecraft.util.io.netty.channel.ChannelInboundHandlerAdapter;
+import net.minecraft.util.io.netty.channel.ChannelInitializer;
+
+import com.comphenix.protocol.Packets;
+import com.comphenix.protocol.concurrency.IntegerSet;
+import com.comphenix.protocol.events.ConnectionSide;
+import com.comphenix.protocol.events.NetworkMarker;
+import com.comphenix.protocol.events.PacketContainer;
+import com.comphenix.protocol.events.PacketEvent;
+import com.comphenix.protocol.injector.ListenerInvoker;
+import com.comphenix.protocol.injector.netty.ChannelInjector.ChannelListener;
+import com.comphenix.protocol.injector.packet.PacketInjector;
+import com.comphenix.protocol.injector.player.PlayerInjectionHandler;
+import com.comphenix.protocol.injector.server.TemporaryPlayerFactory;
+import com.comphenix.protocol.injector.spigot.AbstractPacketInjector;
+import com.comphenix.protocol.injector.spigot.AbstractPlayerHandler;
+import com.comphenix.protocol.reflect.FuzzyReflection;
+import com.comphenix.protocol.reflect.VolatileField;
+import com.comphenix.protocol.utility.MinecraftReflection;
+
+public class NettyProtocolInjector implements ChannelListener {   
+    private volatile boolean injected;
+    private volatile boolean closed;
+    
+    // The temporary player factory
+    private TemporaryPlayerFactory playerFactory = new TemporaryPlayerFactory();
+    private VolatileField bootstrapField;
+    
+	// Different sending filters
+	private IntegerSet queuedFilters = new IntegerSet(Packets.PACKET_COUNT);
+	private IntegerSet reveivedFilters = new IntegerSet(Packets.PACKET_COUNT);
+	
+	// Which packets are buffered
+    private Set<Integer> bufferedPackets;
+	
+    private ListenerInvoker invoker;
+    
+    public NettyProtocolInjector(ListenerInvoker invoker) {
+		this.invoker = invoker;
+	}
+
+	/**
+     * Inject into the spigot connection class.
+     */
+    @SuppressWarnings("unchecked")
+	public synchronized void inject() {
+        if (injected)
+            throw new IllegalStateException("Cannot inject twice.");
+        try {
+        	FuzzyReflection fuzzyServer = FuzzyReflection.fromClass(MinecraftReflection.getMinecraftServerClass());
+            Method serverConnectionMethod = fuzzyServer.getMethodByParameters("getServerConnection", MinecraftReflection.getServerConnectionClass(), new Class[] {});
+            
+            // Get the server connection
+            Object server = fuzzyServer.getSingleton();
+            Object serverConnection = serverConnectionMethod.invoke(server);
+            
+            // Handle connected channels
+            final ChannelInboundHandler initProtocol = new ChannelInitializer<Channel>() {
+                @Override
+                protected void initChannel(Channel channel) throws Exception {
+                    // Check and see if the injector has closed
+                    synchronized (this) {
+                        if (closed)
+                            return;
+                    }
+                    ChannelInjector.fromChannel(channel, NettyProtocolInjector.this, playerFactory).inject();
+                }
+            };
+            
+            // Add our handler to newly created channels
+            final ChannelHandler connectionHandler = new ChannelInboundHandlerAdapter() {
+            	@Override
+            	public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
+                    Channel channel = (Channel) msg;
+                    
+                    // Execute the other handlers before adding our own
+                    ctx.fireChannelRead(msg);
+                    channel.pipeline().addLast(initProtocol);
+            	}
+            };
+            
+            // Insert ProtocolLib's connection interceptor
+            bootstrapField = getBootstrapField(serverConnection);
+            bootstrapField.setValue(new BootstrapList(
+            	(List<ChannelFuture>) bootstrapField.getValue(), connectionHandler
+            ));
+            
+            injected = true;
+            
+        } catch (Exception e) {
+            throw new RuntimeException("Unable to inject channel futures.", e);
+        }
+    }
+    
+    /**
+     * Inject our packet handling into a specific player.
+     * @param player
+     */
+    public void injectPlayer(Player player) {
+    	ChannelInjector.fromPlayer(player, this).inject();
+    }
+    
+    private VolatileField getBootstrapField(Object serverConnection) {
+    	VolatileField firstVolatile = null;
+    	
+    	for (Field field : FuzzyReflection.fromObject(serverConnection, true).getFieldListByType(List.class)) {
+    		VolatileField currentVolatile = new VolatileField(field, serverConnection, true);
+    		@SuppressWarnings("unchecked")
+			List<Object> list = (List<Object>) currentVolatile.getValue();
+    		
+    		// Also save the first list
+    		if (firstVolatile == null) {
+    			firstVolatile = currentVolatile;
+    		}
+    		if (list.size() > 0 && list.get(0) instanceof ChannelFuture) {
+    			return currentVolatile;
+    		}
+    	}
+    	return firstVolatile;
+    }
+    
+    /**
+     * Clean up any remaning injections.
+     */
+    public synchronized void close() {
+        if (!closed) {
+            closed = true;
+            
+            @SuppressWarnings("unchecked")
+			List<Object> bootstraps = (List<Object>) bootstrapField.getValue();
+            
+            // Remember to close all the bootstraps
+            for (Object value : bootstraps) {
+            	if (value instanceof BootstrapList) {
+            		((BootstrapList) value).close();
+            	}
+            }
+            
+            // Uninject all the players
+            for (Player player : Bukkit.getServer().getOnlinePlayers()) {
+            	ChannelInjector.fromPlayer(player, this).close();
+            }
+            bootstrapField.revertValue();
+        }
+    }
+    
+	@Override
+	public Object onPacketSending(ChannelInjector injector, Object packet, NetworkMarker marker) {
+		Integer id = invoker.getPacketID(packet);
+		
+		if (id != null && queuedFilters.contains(id)) {
+			// Check for ignored packets
+			if (injector.unignorePacket(packet)) {
+				return packet;
+			}
+			PacketContainer container = new PacketContainer(id, packet);
+			PacketEvent event = packetQueued(container, injector.getPlayer());
+			
+			if (!event.isCancelled()) {
+				injector.saveEvent(marker, event);
+				return event.getPacket().getHandle();
+			} else {
+				return null; // Cancel
+			}
+		}
+		// Don't change anything
+		return packet;
+	}
+
+	@Override
+	public Object onPacketReceiving(ChannelInjector injector, Object packet, NetworkMarker marker) {
+		Integer id = invoker.getPacketID(packet);
+		
+		if (id != null && reveivedFilters.contains(id)) {
+			// Check for ignored packets
+			if (injector.unignorePacket(packet)) {
+				return packet;
+			}
+			PacketContainer container = new PacketContainer(id, packet);
+			PacketEvent event = packetReceived(container, injector.getPlayer(), marker);
+			
+			if (!event.isCancelled()) {
+				return event.getPacket().getHandle();
+			} else {
+				return null; // Cancel
+			}
+		}
+		// Don't change anything
+		return packet;
+	}
+
+	@Override
+	public boolean includeBuffer(int packetId) {
+		return bufferedPackets.contains(packetId);
+	}
+ 
+	/**
+	 * Called to inform the event listeners of a queued packet.
+	 * @param packet - the packet that is to be sent.
+	 * @param reciever - the reciever of this packet.
+	 * @return The packet event that was used.
+	 */
+	private PacketEvent packetQueued(PacketContainer packet, Player reciever) {
+		PacketEvent event = PacketEvent.fromServer(this, packet, reciever);
+		
+		invoker.invokePacketSending(event);
+		return event;
+	}
+	
+	/**
+	 * Called to inform the event listeners of a received packet.
+	 * @param packet - the packet that has been receieved.
+	 * @param sender - the client packet.
+	 * @param marker - the network marker.
+	 * @return The packet event that was used.
+	 */
+	private PacketEvent packetReceived(PacketContainer packet, Player sender, NetworkMarker marker) {
+		PacketEvent event = PacketEvent.fromClient(this, packet, marker, sender);
+		
+		invoker.invokePacketRecieving(event);
+		return event;
+	}
+    
+	public PlayerInjectionHandler getPlayerInjector() {
+		return new AbstractPlayerHandler(queuedFilters) {
+			private ChannelListener listener = NettyProtocolInjector.this;
+			
+			@Override
+			public void updatePlayer(Player player) {
+				// Ignore it
+			}
+			
+			@Override
+			public boolean uninjectPlayer(InetSocketAddress address) {
+				// Ignore this too
+				return true;
+			}
+			
+			@Override
+			public boolean uninjectPlayer(Player player) {
+				ChannelInjector.fromPlayer(player, listener).close();
+				return true;
+			}
+			
+			@Override
+			public void sendServerPacket(Player reciever, PacketContainer packet, NetworkMarker marker, boolean filters) throws InvocationTargetException {
+				ChannelInjector.fromPlayer(reciever, listener).sendServerPacket(packet.getHandle(), marker, filters);
+			}
+			
+			@Override
+			public void recieveClientPacket(Player player, Object mcPacket) throws IllegalAccessException, InvocationTargetException {
+				ChannelInjector.fromPlayer(player, listener).recieveClientPacket(mcPacket, null, true);
+			}
+			
+			@Override
+			public void injectPlayer(Player player, ConflictStrategy strategy) {
+				ChannelInjector.fromPlayer(player, listener).inject();
+			}
+			
+			@Override
+			public PacketEvent handlePacketRecieved(PacketContainer packet, InputStream input, byte[] buffered) {
+				// Ignore this
+				return null;
+			}
+			
+			@Override
+			public void handleDisconnect(Player player) {
+				ChannelInjector.fromPlayer(player, listener).close();
+			}
+		};
+	}
+	
+	/**
+	 * Retrieve a view of this protocol injector as a packet injector.
+	 * @return The packet injector.
+	 */
+	public PacketInjector getPacketInjector() {
+		return new AbstractPacketInjector(reveivedFilters) {
+			@Override
+			public PacketEvent packetRecieved(PacketContainer packet, Player client, byte[] buffered) {
+				NetworkMarker marker = buffered != null ? new NetworkMarker(ConnectionSide.CLIENT_SIDE, buffered) : null;
+				ChannelInjector.fromPlayer(client, NettyProtocolInjector.this).saveMarker(packet.getHandle(), marker);
+				return packetReceived(packet, client, marker);
+			}
+			
+			@Override
+			public void inputBuffersChanged(Set<Integer> set) {
+				bufferedPackets = set;
+			}
+		};
+	}
+}

ProtocolLib/src/main/java/com/comphenix/protocol/injector/netty/NettyProtocolRegistry.java

@@ -0,0 +1,129 @@
+package com.comphenix.protocol.injector.netty;
+
+import java.util.Collections;
+import java.util.List;
+import java.util.Map;
+import java.util.Map.Entry;
+import java.util.Set;
+
+import com.comphenix.protocol.PacketType;
+import com.comphenix.protocol.PacketType.Protocol;
+import com.comphenix.protocol.PacketType.Sender;
+import com.comphenix.protocol.reflect.StructureModifier;
+import com.comphenix.protocol.utility.MinecraftReflection;
+import com.google.common.collect.BiMap;
+import com.google.common.collect.HashBiMap;
+import com.google.common.collect.Lists;
+import com.google.common.collect.Sets;
+
+/**
+ * Represents a way of accessing the new netty Protocol enum.
+ * @author Kristian
+ */
+// TODO: Handle modifications to the BiMap
+public class NettyProtocolRegistry {
+	private Class<?> enumProtocol;
+	
+	// The main lookup table
+	private BiMap<PacketType, Class<?>> typeToClass = HashBiMap.create();
+	private Set<PacketType> serverPackets = Sets.newHashSet();
+	private Set<PacketType> clientPackets = Sets.newHashSet();
+	
+	public NettyProtocolRegistry() {
+		enumProtocol = MinecraftReflection.getEnumProtocolClass();
+		initialize();
+	}
+	
+	/**
+	 * Retrieve an immutable view of the packet type lookup.
+	 * @return The packet type lookup.
+	 */
+	public Map<PacketType, Class<?>> getPacketTypeLookup() {
+		return Collections.unmodifiableMap(typeToClass);
+	}
+	
+	/**
+	 * Retrieve an immutable view of the class to packet tyåe lookup.
+	 * @return The packet type lookup.
+	 */
+	public Map<Class<?>, PacketType> getPacketClassLookup() {
+		return Collections.unmodifiableMap(typeToClass.inverse());
+	}
+	
+	/**
+	 * Retrieve every known client packet, from every protocol.
+	 * @return Every client packet.
+	 */
+	public Set<PacketType> getClientPackets() {
+		return Collections.unmodifiableSet(clientPackets);
+	}
+	
+	/**
+	 * Retrieve every known server packet, from every protocol.
+	 * @return Every server packet.
+	 */
+	public Set<PacketType> getServerPackets() {
+		return Collections.unmodifiableSet(serverPackets);
+	}
+	
+	/**
+	 * Load the packet lookup tables in each protocol.
+	 */
+	private void initialize() {
+		final Object[] protocols = enumProtocol.getEnumConstants();
+		List<Map<Integer, Class<?>>> serverPackets = Lists.newArrayList();
+		List<Map<Integer, Class<?>>> clientPackets = Lists.newArrayList();
+		StructureModifier<Object> modifier = null;
+		
+		for (Object protocol : protocols) {
+			if (modifier == null)
+				modifier = new StructureModifier<Object>(protocol.getClass().getSuperclass(), false);
+			StructureModifier<Map<Integer, Class<?>>> maps = modifier.withTarget(protocol).withType(Map.class);
+			
+			serverPackets.add(maps.read(0));
+			clientPackets.add(maps.read(1));
+		}
+		
+		// Heuristic - there are more server packets than client packets
+		if (sum(clientPackets) > sum(serverPackets)) {
+			// Swap if this is violated
+			List<Map<Integer, Class<?>>> temp = serverPackets;
+			serverPackets = clientPackets;
+			clientPackets = temp;
+		}
+		
+		for (int i = 0; i < protocols.length; i++) {
+			Enum<?> enumProtocol = (Enum<?>) protocols[i];
+			Protocol equivalent = Protocol.fromVanilla(enumProtocol);
+			
+			// Associate known types
+			associatePackets(serverPackets.get(i), equivalent, Sender.SERVER);
+			associatePackets(clientPackets.get(i), equivalent, Sender.CLIENT);
+		}
+	}
+	
+	private void associatePackets(Map<Integer, Class<?>> lookup, Protocol protocol, Sender sender) {
+		for (Entry<Integer, Class<?>> entry : lookup.entrySet()) {
+			PacketType type = PacketType.fromCurrent(protocol, sender, entry.getKey(), PacketType.UNKNOWN_PACKET);
+			typeToClass.put(type, entry.getValue());
+			
+			if (sender == Sender.SERVER)
+				serverPackets.add(type);
+			if (sender == Sender.CLIENT)
+				clientPackets.add(type);
+		}
+	}
+	
+	/**
+	 * Retrieve the number of mapping in all the maps.
+	 * @param maps - iterable of maps.
+	 * @return The sum of all the entries.
+	 */
+	private int sum(Iterable<? extends Map<Integer, Class<?>>> maps) {
+		int count = 0;
+		
+		for (Map<Integer, Class<?>> map : maps) 
+			count += map.size();
+		return count;
+	}
+}

ProtocolLib/src/main/java/com/comphenix/protocol/injector/netty/NettySocketAdaptor.java

@@ -0,0 +1,248 @@
+package com.comphenix.protocol.injector.netty;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.net.InetAddress;
+import java.net.Socket;
+import java.net.SocketAddress;
+import java.net.SocketException;
+
+import net.minecraft.util.io.netty.channel.ChannelOption;
+import net.minecraft.util.io.netty.channel.socket.SocketChannel;
+
+/**
+ * This class wraps a Netty {@link Channel} in a {@link Socket}. It overrides
+ * all methods in {@link Socket} to ensure that calls are not mistakingly made
+ * to the unsupported super socket. All operations that can be sanely applied to
+ * a {@link Channel} are implemented here. Those which cannot will throw an
+ * {@link UnsupportedOperationException}.
+ */
+// Thanks MD5. :)
+class NettySocketAdaptor extends Socket {
+    private final SocketChannel ch;
+
+    private NettySocketAdaptor(SocketChannel ch) {
+        this.ch = ch;
+    }
+
+    public static NettySocketAdaptor adapt(SocketChannel ch) {
+        return new NettySocketAdaptor(ch);
+    }
+
+    @Override
+    public void bind(SocketAddress bindpoint) throws IOException {
+        ch.bind(bindpoint).syncUninterruptibly();
+    }
+
+    @Override
+    public synchronized void close() throws IOException {
+        ch.close().syncUninterruptibly();
+    }
+
+    @Override
+    public void connect(SocketAddress endpoint) throws IOException {
+        ch.connect(endpoint).syncUninterruptibly();
+    }
+
+    @Override
+    public void connect(SocketAddress endpoint, int timeout) throws IOException {
+        ch.config().setConnectTimeoutMillis(timeout);
+        ch.connect(endpoint).syncUninterruptibly();
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        return obj instanceof NettySocketAdaptor && ch.equals(((NettySocketAdaptor) obj).ch);
+    }
+
+    @Override
+    public java.nio.channels.SocketChannel getChannel() {
+         throw new UnsupportedOperationException("Operation not supported on Channel wrapper.");
+    }
+
+    @Override
+    public InetAddress getInetAddress() {
+        return ch.remoteAddress().getAddress();
+    }
+
+    @Override
+    public InputStream getInputStream() throws IOException {
+        throw new UnsupportedOperationException("Operation not supported on Channel wrapper.");
+    }
+
+    @Override
+    public boolean getKeepAlive() throws SocketException {
+        return ch.config().getOption(ChannelOption.SO_KEEPALIVE);
+    }
+
+    @Override
+    public InetAddress getLocalAddress() {
+        return ch.localAddress().getAddress();
+    }
+
+    @Override
+    public int getLocalPort() {
+        return ch.localAddress().getPort();
+    }
+
+    @Override
+    public SocketAddress getLocalSocketAddress() {
+        return ch.localAddress();
+    }
+
+    @Override
+    public boolean getOOBInline() throws SocketException {
+        throw new UnsupportedOperationException("Operation not supported on Channel wrapper.");
+    }
+
+    @Override
+    public OutputStream getOutputStream() throws IOException {
+        throw new UnsupportedOperationException("Operation not supported on Channel wrapper.");
+    }
+
+    @Override
+    public int getPort() {
+        return ch.remoteAddress().getPort();
+    }
+
+    @Override
+    public synchronized int getReceiveBufferSize() throws SocketException {
+        return ch.config().getOption(ChannelOption.SO_RCVBUF);
+    }
+
+    @Override
+    public SocketAddress getRemoteSocketAddress() {
+        return ch.remoteAddress();
+    }
+
+    @Override
+    public boolean getReuseAddress() throws SocketException {
+        return ch.config().getOption(ChannelOption.SO_REUSEADDR);
+    }
+
+    @Override
+    public synchronized int getSendBufferSize() throws SocketException {
+        return ch.config().getOption(ChannelOption.SO_SNDBUF);
+    }
+
+    @Override
+    public int getSoLinger() throws SocketException {
+        return ch.config().getOption(ChannelOption.SO_LINGER);
+    }
+
+    @Override
+    public synchronized int getSoTimeout() throws SocketException {
+        throw new UnsupportedOperationException("Operation not supported on Channel wrapper.");
+    }
+
+    @Override
+    public boolean getTcpNoDelay() throws SocketException {
+        return ch.config().getOption(ChannelOption.TCP_NODELAY);
+    }
+
+    @Override
+    public int getTrafficClass() throws SocketException {
+        return ch.config().getOption(ChannelOption.IP_TOS);
+    }
+
+    @Override
+    public int hashCode() {
+        return ch.hashCode();
+    }
+
+    @Override
+    public boolean isBound() {
+        return ch.localAddress() != null;
+    }
+
+    @Override
+    public boolean isClosed() {
+        return !ch.isOpen();
+    }
+
+    @Override
+    public boolean isConnected() {
+        return ch.isActive();
+    }
+
+    @Override
+    public boolean isInputShutdown() {
+        return ch.isInputShutdown();
+    }
+
+    @Override
+    public boolean isOutputShutdown() {
+        return ch.isOutputShutdown();
+    }
+
+    @Override
+    public void sendUrgentData(int data) throws IOException {
+        throw new UnsupportedOperationException("Operation not supported on Channel wrapper.");
+    }
+
+    @Override
+    public void setKeepAlive(boolean on) throws SocketException {
+        ch.config().setOption(ChannelOption.SO_KEEPALIVE, on);
+    }
+
+    @Override
+    public void setOOBInline(boolean on) throws SocketException {
+        throw new UnsupportedOperationException("Operation not supported on Channel wrapper.");
+    }
+
+    @Override
+    public void setPerformancePreferences(int connectionTime, int latency, int bandwidth) {
+        throw new UnsupportedOperationException("Operation not supported on Channel wrapper.");
+    }
+
+    @Override
+    public synchronized void setReceiveBufferSize(int size) throws SocketException {
+        ch.config().setOption(ChannelOption.SO_RCVBUF, size);
+    }
+
+    @Override
+    public void setReuseAddress(boolean on) throws SocketException {
+        ch.config().setOption(ChannelOption.SO_REUSEADDR, on);
+    }
+
+    @Override
+    public synchronized void setSendBufferSize(int size) throws SocketException {
+        ch.config().setOption(ChannelOption.SO_SNDBUF, size);
+    }
+
+    @Override
+    public void setSoLinger(boolean on, int linger) throws SocketException {
+        ch.config().setOption(ChannelOption.SO_LINGER, linger);
+    }
+
+    @Override
+    public synchronized void setSoTimeout(int timeout) throws SocketException {
+        throw new UnsupportedOperationException("Operation not supported on Channel wrapper.");
+    }
+
+    @Override
+    public void setTcpNoDelay(boolean on) throws SocketException {
+        ch.config().setOption(ChannelOption.TCP_NODELAY, on);
+    }
+
+    @Override
+    public void setTrafficClass(int tc) throws SocketException {
+        ch.config().setOption(ChannelOption.IP_TOS, tc);
+    }
+
+    @Override
+    public void shutdownInput() throws IOException {
+        throw new UnsupportedOperationException("Operation not supported on Channel wrapper.");
+    }
+
+    @Override
+    public void shutdownOutput() throws IOException {
+        ch.shutdownOutput().syncUninterruptibly();
+    }
+
+    @Override
+    public String toString() {
+        return ch.toString();
+    }
+}

ProtocolLib/src/main/java/com/comphenix/protocol/injector/packet/LegacyPacketRegistry.java

@@ -0,0 +1,344 @@
+package com.comphenix.protocol.injector.packet;
+
+import java.lang.reflect.Field;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import java.util.Map.Entry;
+
+import javax.annotation.Nullable;
+
+import net.sf.cglib.proxy.Factory;
+
+import com.comphenix.protocol.reflect.FieldAccessException;
+import com.comphenix.protocol.reflect.FieldUtils;
+import com.comphenix.protocol.reflect.FuzzyReflection;
+import com.comphenix.protocol.reflect.fuzzy.FuzzyClassContract;
+import com.comphenix.protocol.reflect.fuzzy.FuzzyFieldContract;
+import com.comphenix.protocol.reflect.fuzzy.FuzzyMethodContract;
+import com.comphenix.protocol.utility.MinecraftReflection;
+import com.comphenix.protocol.wrappers.TroveWrapper;
+
+import com.google.common.base.Predicate;
+import com.google.common.collect.ImmutableSet;
+import com.google.common.collect.Iterables;
+import com.google.common.collect.Multimap;
+
+@SuppressWarnings("rawtypes")
+class LegacyPacketRegistry {	
+	private static final int MIN_SERVER_PACKETS = 5;
+	private static final int MIN_CLIENT_PACKETS = 5;
+
+	// Fuzzy reflection
+	private FuzzyReflection packetRegistry;
+	
+	// The packet class to packet ID translator
+	private Map<Class, Integer> packetToID;
+	
+	// Packet IDs to classes, grouped by whether or not they're vanilla or custom defined
+	private Multimap<Integer, Class> customIdToPacket;
+	private Map<Integer, Class> vanillaIdToPacket;
+	
+	// Whether or not certain packets are sent by the client or the server
+	private ImmutableSet<Integer> serverPackets;
+	private ImmutableSet<Integer> clientPackets;
+	
+	// The underlying sets
+	private Set<Integer> serverPacketsRef;
+	private Set<Integer> clientPacketsRef;
+	
+	// New proxy values
+	private Map<Integer, Class> overwrittenPackets = new HashMap<Integer, Class>();
+	
+	// Vanilla packets
+	private Map<Integer, Class> previousValues = new HashMap<Integer, Class>();
+		
+	/**
+	 * Initialize the registry.
+	 */
+	@SuppressWarnings({ "unchecked" })
+	public void initialize() {
+		if (packetToID == null) {
+			try {
+				Field packetsField = getPacketRegistry().getFieldByType("packetsField", Map.class);
+				packetToID = (Map<Class, Integer>) FieldUtils.readStaticField(packetsField, true);
+			} catch (IllegalArgumentException e) {
+				// Spigot 1.2.5 MCPC workaround
+				try {
+					packetToID = getSpigotWrapper();
+				} catch (Exception e2) {
+					// Very bad indeed
+					throw new IllegalArgumentException(e.getMessage() + "; Spigot workaround failed.", e2);
+				}
+				
+			} catch (IllegalAccessException e) {
+				throw new RuntimeException("Unable to retrieve the packetClassToIdMap", e);
+			}
+			
+			// Create the inverse maps
+			customIdToPacket = InverseMaps.inverseMultimap(packetToID, new Predicate<Map.Entry<Class, Integer>>() {
+				@Override
+				public boolean apply(@Nullable Entry<Class, Integer> entry) {
+					return !MinecraftReflection.isMinecraftClass(entry.getKey());
+				}
+			});
+			
+			// And the vanilla pack - here we assume a unique ID to class mapping
+			vanillaIdToPacket = InverseMaps.inverseMap(packetToID, new Predicate<Map.Entry<Class, Integer>>() {
+				@Override
+				public boolean apply(@Nullable Entry<Class, Integer> entry) {
+					return MinecraftReflection.isMinecraftClass(entry.getKey());
+				}
+			});
+		}
+		initializeSets();
+	}
+	
+	@SuppressWarnings("unchecked")
+	private void initializeSets() throws FieldAccessException {
+		if (serverPacketsRef == null || clientPacketsRef == null) {
+			List<Field> sets = getPacketRegistry().getFieldListByType(Set.class);
+			
+			try {
+				if (sets.size() > 1) {
+					serverPacketsRef = (Set<Integer>) FieldUtils.readStaticField(sets.get(0), true);
+					clientPacketsRef = (Set<Integer>) FieldUtils.readStaticField(sets.get(1), true);
+					
+					// Impossible
+					if (serverPacketsRef == null || clientPacketsRef == null)
+						throw new FieldAccessException("Packet sets are in an illegal state.");
+					
+					// NEVER allow callers to modify the underlying sets
+					serverPackets = ImmutableSet.copyOf(serverPacketsRef);
+					clientPackets = ImmutableSet.copyOf(clientPacketsRef);
+					
+					// Check sizes
+					if (serverPackets.size() < MIN_SERVER_PACKETS)
+						throw new InsufficientPacketsException("Insufficient server packets.", false, serverPackets.size());
+					if (clientPackets.size() < MIN_CLIENT_PACKETS)
+						throw new InsufficientPacketsException("Insufficient client packets.", true, clientPackets.size());
+					
+				} else {
+					throw new FieldAccessException("Cannot retrieve packet client/server sets.");
+				}
+				
+			} catch (IllegalAccessException e) {
+				throw new FieldAccessException("Cannot access field.", e);
+			}
+			
+		} else {
+			// Copy over again if it has changed
+			if (serverPacketsRef != null && serverPacketsRef.size() != serverPackets.size())
+				serverPackets = ImmutableSet.copyOf(serverPacketsRef);
+			if (clientPacketsRef != null && clientPacketsRef.size() != clientPackets.size())
+				clientPackets = ImmutableSet.copyOf(clientPacketsRef);
+		}
+	}
+	
+	/**
+	 * Retrieve the packet mapping.
+	 * @return The packet map.
+	 */
+	public Map<Class, Integer> getPacketToID() {
+		// Initialize it, if we haven't already
+		if (packetToID == null) {
+			initialize();
+		}
+		return packetToID;
+	}
+	
+	private Map<Class, Integer> getSpigotWrapper() throws IllegalAccessException {
+		// If it talks like a duck, etc.
+		// Perhaps it would be nice to have a proper duck typing library as well
+		FuzzyClassContract mapLike = FuzzyClassContract.newBuilder().
+				method(FuzzyMethodContract.newBuilder().
+						nameExact("size").returnTypeExact(int.class)).
+				method(FuzzyMethodContract.newBuilder().
+						nameExact("put").parameterCount(2)).
+				method(FuzzyMethodContract.newBuilder().
+						nameExact("get").parameterCount(1)).
+				build();
+		
+		Field packetsField = getPacketRegistry().getField(
+				FuzzyFieldContract.newBuilder().typeMatches(mapLike).build());
+		Object troveMap = FieldUtils.readStaticField(packetsField, true);
+		
+		// Check for stupid no_entry_values
+		try {
+			Field field = FieldUtils.getField(troveMap.getClass(), "no_entry_value", true);
+			Integer value = (Integer) FieldUtils.readField(field, troveMap, true);
+			
+			if (value >= 0 && value < 256) {
+				// Someone forgot to set the no entry value. Let's help them.
+				FieldUtils.writeField(field, troveMap, -1);
+			}
+		} catch (IllegalArgumentException e) {
+			throw new CannotCorrectTroveMapException(e);
+		}
+		
+		// We'll assume this a Trove map
+		return TroveWrapper.getDecoratedMap(troveMap);
+	}
+	
+	/**
+	 * Retrieve the cached fuzzy reflection instance allowing access to the packet registry.
+	 * @return Reflected packet registry.
+	 */ 
+	private FuzzyReflection getPacketRegistry() {
+		if (packetRegistry == null)
+			packetRegistry = FuzzyReflection.fromClass(MinecraftReflection.getPacketClass(), true);
+		return packetRegistry;
+	}
+	
+	/**
+	 * Retrieve the injected proxy classes handlig each packet ID.
+	 * @return Injected classes.
+	 */
+	public Map<Integer, Class> getOverwrittenPackets() {
+		return overwrittenPackets;
+	}
+	
+	/**
+	 * Retrieve the vanilla classes handling each packet ID.
+	 * @return Vanilla classes.
+	 */
+	public Map<Integer, Class> getPreviousPackets() {
+		return previousValues;
+	}
+	
+	/**
+	 * Retrieve every known and supported server packet.
+	 * @return An immutable set of every known server packet.
+	 * @throws FieldAccessException If we're unable to retrieve the server packet data from Minecraft.
+	 */
+	public Set<Integer> getServerPackets() throws FieldAccessException {
+		initializeSets();
+		
+		// Sanity check. This is impossible!
+		if (serverPackets != null && serverPackets.size() < MIN_SERVER_PACKETS) 
+			throw new FieldAccessException("Server packet list is empty. Seems to be unsupported");
+		return serverPackets;
+	}
+	
+	/**
+	 * Retrieve every known and supported client packet.
+	 * @return An immutable set of every known client packet.
+	 * @throws FieldAccessException If we're unable to retrieve the client packet data from Minecraft.
+	 */
+	public Set<Integer> getClientPackets() throws FieldAccessException {
+		initializeSets();
+		
+		// As above
+		if (clientPackets != null && clientPackets.size() < MIN_CLIENT_PACKETS) 
+			throw new FieldAccessException("Client packet list is empty. Seems to be unsupported");
+		return clientPackets;
+	}
+		
+	/**
+	 * Retrieves the correct packet class from a given packet ID.
+	 * @param packetID - the packet ID.
+	 * @return The associated class.
+	 */
+	public Class getPacketClassFromID(int packetID) {
+		return getPacketClassFromID(packetID, false);
+	}
+	
+	/**
+	 * Retrieves the correct packet class from a given packet ID.
+	 * @param packetID - the packet ID.
+ 	 * @param forceVanilla - whether or not to look for vanilla classes, not injected classes.
+	 * @return The associated class.
+	 */
+	public Class getPacketClassFromID(int packetID, boolean forceVanilla) {
+		Map<Integer, Class> lookup = forceVanilla ? previousValues : overwrittenPackets;
+		Class<?> result = null;
+		
+		// Optimized lookup
+		if (lookup.containsKey(packetID)) {
+			return removeEnhancer(lookup.get(packetID), forceVanilla);
+		}
+		
+		// Refresh lookup tables
+		getPacketToID();
+
+		// See if we can look for non-vanilla classes
+		if (!forceVanilla) {
+			result = Iterables.getFirst(customIdToPacket.get(packetID), null);
+		}
+		if (result == null) {
+			result = vanillaIdToPacket.get(packetID);
+		}
+		
+		// See if we got it
+		if (result != null)
+			return result;
+		else
+			throw new IllegalArgumentException("The packet ID " + packetID + " is not registered.");
+	}
+	
+	/**
+	 * Retrieve the packet ID of a given packet.
+	 * @param packet - the type of packet to check.
+	 * @return The ID of the given packet.
+	 * @throws IllegalArgumentException If this is not a valid packet.
+	 */
+	public int getPacketID(Class<?> packet) {
+		if (packet == null)
+			throw new IllegalArgumentException("Packet type class cannot be NULL.");
+		if (!MinecraftReflection.getPacketClass().isAssignableFrom(packet))
+			throw new IllegalArgumentException("Type must be a packet.");
+		
+		// The registry contains both the overridden and original packets
+		return getPacketToID().get(packet);
+	}
+	
+	/**
+	 * Find the first superclass that is not a CBLib proxy object.
+	 * @param clazz - the class whose hierachy we're going to search through.
+	 * @param remove - whether or not to skip enhanced (proxy) classes.
+	 * @return If remove is TRUE, the first superclass that is not a proxy.
+	 */
+	private static Class removeEnhancer(Class clazz, boolean remove) {
+		if (remove) {
+			// Get the underlying vanilla class
+			while (Factory.class.isAssignableFrom(clazz) && !clazz.equals(Object.class)) {
+				clazz = clazz.getSuperclass();
+			}
+		}
+		return clazz;
+	}
+	
+	/**
+	 * Occurs when we were unable to retrieve all the packets in the registry.
+	 * @author Kristian
+	 */
+	public static class InsufficientPacketsException extends RuntimeException {
+		private static final long serialVersionUID = 1L;
+		
+		private final boolean client;
+		private final int packetCount;
+		
+		private InsufficientPacketsException(String message, boolean client, int packetCount) {
+			super(message);
+			this.client = client;
+			this.packetCount = packetCount;
+		}
+
+		public boolean isClient() {
+			return client;
+		}
+		
+		public int getPacketCount() {
+			return packetCount;
+		}
+	}
+	
+	public static class CannotCorrectTroveMapException extends RuntimeException {
+		private static final long serialVersionUID = 1L;
+
+		private CannotCorrectTroveMapException(Throwable inner) {
+			super("Cannot correct trove map.", inner);
+		}
+	}
+}

ProtocolLib/src/main/java/com/comphenix/protocol/injector/packet/PacketInjector.java

@@ -8,7 +8,7 @@ import com.comphenix.protocol.events.PacketContainer;
 import com.comphenix.protocol.events.PacketEvent;
 
 /**
- * Represents a incoming packet injector.
+ * Represents an incoming packet injector.
  * 
  * @author Kristian
  */

ProtocolLib/src/main/java/com/comphenix/protocol/injector/packet/PacketRegistry.java

@@ -17,36 +17,26 @@
 
 package com.comphenix.protocol.injector.packet;
 
-import java.lang.reflect.Field;
-import java.util.HashMap;
-import java.util.List;
+import java.util.Collections;
 import java.util.Map;
-import java.util.Set;
 import java.util.Map.Entry;
+import java.util.Set;
 
-import javax.annotation.Nullable;
-
-import net.sf.cglib.proxy.Factory;
-
+import com.comphenix.protocol.PacketType;
 import com.comphenix.protocol.ProtocolLibrary;
 import com.comphenix.protocol.error.Report;
 import com.comphenix.protocol.error.ReportType;
+import com.comphenix.protocol.injector.netty.NettyProtocolRegistry;
+import com.comphenix.protocol.injector.packet.LegacyPacketRegistry.CannotCorrectTroveMapException;
+import com.comphenix.protocol.injector.packet.LegacyPacketRegistry.InsufficientPacketsException;
 import com.comphenix.protocol.reflect.FieldAccessException;
-import com.comphenix.protocol.reflect.FieldUtils;
-import com.comphenix.protocol.reflect.FuzzyReflection;
-import com.comphenix.protocol.reflect.fuzzy.FuzzyClassContract;
-import com.comphenix.protocol.reflect.fuzzy.FuzzyFieldContract;
-import com.comphenix.protocol.reflect.fuzzy.FuzzyMethodContract;
 import com.comphenix.protocol.utility.MinecraftReflection;
-import com.comphenix.protocol.wrappers.TroveWrapper;
-import com.google.common.base.Predicate;
-import com.google.common.collect.ImmutableSet;
-import com.google.common.collect.Iterables;
-import com.google.common.collect.Multimap;
+import com.google.common.base.Function;
+import com.google.common.collect.Maps;
+import com.google.common.collect.Sets;
 
 /**
  * Static packet registry in Minecraft.
- * 
  * @author Kristian
  */
 @SuppressWarnings("rawtypes")
@@ -56,278 +46,350 @@ public class PacketRegistry {
 	public static final ReportType REPORT_INSUFFICIENT_SERVER_PACKETS = new ReportType("Too few server packets detected: %s");
 	public static final ReportType REPORT_INSUFFICIENT_CLIENT_PACKETS = new ReportType("Too few client packets detected: %s");
 
-	private static final int MIN_SERVER_PACKETS = 5;
-	private static final int MIN_CLIENT_PACKETS = 5;
+	// Two different packet registry
+	private static volatile LegacyPacketRegistry LEGACY;
+	private static volatile NettyProtocolRegistry NETTY;
 	
-	// Fuzzy reflection
-	private static FuzzyReflection packetRegistry;
+	// Cached for legacy
+	private static volatile Set<PacketType> NETTY_SERVER_PACKETS;
+	private static volatile Set<PacketType> NETTY_CLIENT_PACKETS;
 	
-	// The packet class to packet ID translator
-	private static Map<Class, Integer> packetToID;
+	// Cached for Netty
+	private static volatile Set<Integer> LEGACY_SERVER_PACKETS;
+	private static volatile Set<Integer> LEGACY_CLIENT_PACKETS;
+	private static volatile Map<Integer, Class> LEGACY_PREVIOUS_PACKETS;
 	
-	// Packet IDs to classes, grouped by whether or not they're vanilla or custom defined
-	private static Multimap<Integer, Class> customIdToPacket;
-	private static Map<Integer, Class> vanillaIdToPacket;
+	// Whether or not the registry has
+	private static boolean INITIALIZED;
 	
-	// Whether or not certain packets are sent by the client or the server
-	private static ImmutableSet<Integer> serverPackets;
-	private static ImmutableSet<Integer> clientPackets;
-	
-	// The underlying sets
-	private static Set<Integer> serverPacketsRef;
-	private static Set<Integer> clientPacketsRef;
-	
-	// New proxy values
-	private static Map<Integer, Class> overwrittenPackets = new HashMap<Integer, Class>();
-	
-	// Vanilla packets
-	private static Map<Integer, Class> previousValues = new HashMap<Integer, Class>();
-	
-	@SuppressWarnings({ "unchecked" })
-	public static Map<Class, Integer> getPacketToID() {
-		// Initialize it, if we haven't already
-		if (packetToID == null) {
-			try {
-				Field packetsField = getPacketRegistry().getFieldByType("packetsField", Map.class);
-				packetToID = (Map<Class, Integer>) FieldUtils.readStaticField(packetsField, true);
-			} catch (IllegalArgumentException e) {
-				// Spigot 1.2.5 MCPC workaround
-				try {
-					packetToID = getSpigotWrapper();
-				} catch (Exception e2) {
-					// Very bad indeed
-					throw new IllegalArgumentException(e.getMessage() + "; Spigot workaround failed.", e2);
+	/**
+	 * Initialize the packet registry.
+	 */
+	private static void initialize() {
+		if (INITIALIZED) {
+			// Make sure they were initialized
+			if (NETTY == null && LEGACY == null)
+				throw new IllegalStateException("No initialized registry.");
+			return;
 		}
 	
-			} catch (IllegalAccessException e) {
-				throw new RuntimeException("Unable to retrieve the packetClassToIdMap", e);
+		// Check for netty
+		if (MinecraftReflection.isUsingNetty()) {
+			if (NETTY == null) {
+				NETTY = new NettyProtocolRegistry();
 			}
-			
-			// Create the inverse maps
-			customIdToPacket = InverseMaps.inverseMultimap(packetToID, new Predicate<Map.Entry<Class, Integer>>() {
-				@Override
-				public boolean apply(@Nullable Entry<Class, Integer> entry) {
-					return !MinecraftReflection.isMinecraftClass(entry.getKey());
+		} else {
+			initializeLegacy();
 		}
-			});
-			
-			// And the vanilla pack - here we assume a unique ID to class mapping
-			vanillaIdToPacket = InverseMaps.inverseMap(packetToID, new Predicate<Map.Entry<Class, Integer>>() {
-				@Override
-				public boolean apply(@Nullable Entry<Class, Integer> entry) {
-					return MinecraftReflection.isMinecraftClass(entry.getKey());
-				}
-			});
-		}
-		return packetToID;
-	}
-	
-	private static Map<Class, Integer> getSpigotWrapper() throws IllegalAccessException {
-		// If it talks like a duck, etc.
-		// Perhaps it would be nice to have a proper duck typing library as well
-		FuzzyClassContract mapLike = FuzzyClassContract.newBuilder().
-				method(FuzzyMethodContract.newBuilder().
-						nameExact("size").returnTypeExact(int.class)).
-				method(FuzzyMethodContract.newBuilder().
-						nameExact("put").parameterCount(2)).
-				method(FuzzyMethodContract.newBuilder().
-						nameExact("get").parameterCount(1)).
-				build();
-		
-		Field packetsField = getPacketRegistry().getField(
-				FuzzyFieldContract.newBuilder().typeMatches(mapLike).build());
-		Object troveMap = FieldUtils.readStaticField(packetsField, true);
-		
-		// Check for stupid no_entry_values
-		try {
-			Field field = FieldUtils.getField(troveMap.getClass(), "no_entry_value", true);
-			Integer value = (Integer) FieldUtils.readField(field, troveMap, true);
-			
-			if (value >= 0 && value < 256) {
-				// Someone forgot to set the no entry value. Let's help them.
-				FieldUtils.writeField(field, troveMap, -1);
-			}
-		} catch (IllegalArgumentException e) {
-			// Whatever			
-			ProtocolLibrary.getErrorReporter().reportWarning(PacketRegistry.class, 
-					Report.newBuilder(REPORT_CANNOT_CORRECT_TROVE_MAP).error(e));
-		}
-		
-		// We'll assume this a Trove map
-		return TroveWrapper.getDecoratedMap(troveMap);
 	}
 	
 	/**
-	 * Retrieve the cached fuzzy reflection instance allowing access to the packet registry.
-	 * @return Reflected packet registry.
+	 * Determine if the given packet type is supported on the current server.
+	 * @param type - the type to check.
+	 * @return TRUE if it is, FALSE otherwise.
 	 */
-	private static FuzzyReflection getPacketRegistry() {
-		if (packetRegistry == null)
-			packetRegistry = FuzzyReflection.fromClass(MinecraftReflection.getPacketClass(), true);
-		return packetRegistry;
+	public static boolean isSupported(PacketType type) {
+		initialize();
+		
+		if (NETTY != null)
+			return NETTY.getPacketTypeLookup().containsKey(type);
+		
+		// Look up the correct type
+		return type.isClient() ? 
+			LEGACY.getClientPackets().contains(type.getLegacyId()) :
+			LEGACY.getServerPackets().contains(type.getLegacyId());
+	}
+	
+	/**
+	 * Initialize the legacy packet registry.
+	 */
+	private static void initializeLegacy() {
+		if (LEGACY == null) {
+			try {
+				LEGACY = new LegacyPacketRegistry();
+				LEGACY.initialize();
+			} catch (InsufficientPacketsException e) {
+				if (e.isClient()) {
+					ProtocolLibrary.getErrorReporter().reportWarning(
+						PacketRegistry.class, Report.newBuilder(REPORT_INSUFFICIENT_CLIENT_PACKETS).messageParam(e.getPacketCount())
+					);
+				} else {
+					ProtocolLibrary.getErrorReporter().reportWarning(
+						PacketRegistry.class, Report.newBuilder(REPORT_INSUFFICIENT_SERVER_PACKETS).messageParam(e.getPacketCount())
+					);
+				}
+			} catch (CannotCorrectTroveMapException e) {
+				ProtocolLibrary.getErrorReporter().reportWarning(PacketRegistry.class, 
+					Report.newBuilder(REPORT_CANNOT_CORRECT_TROVE_MAP).error(e.getCause()));
+			}
+		}
+	}
+	
+	/**
+	 * Retrieve a map of every packet class to every ID.
+	 * <p>
+	 * Deprecated: Use {@link #getPacketToType()} instead.
+	 * @return A map of packet classes and their corresponding ID.
+	 */
+	@Deprecated
+	public static Map<Class, Integer> getPacketToID() {
+		initialize();
+		
+		if (NETTY != null) {
+			@SuppressWarnings("unchecked")
+			Map<Class, Integer> result = (Map)Maps.transformValues(NETTY.getPacketClassLookup(), new Function<PacketType, Integer>() {
+				public Integer apply(PacketType type) {
+					return type.getLegacyId();
+				};
+			});
+			return result;
+		}
+		return LEGACY.getPacketToID();
+	}
+	
+	/**
+	 * Retrieve a map of every packet class to the respective packet type.
+	 * @return A map of packet classes and their corresponding packet type.
+	 */
+	public static Map<Class, PacketType> getPacketToType() {
+		initialize();
+	
+		if (NETTY != null) {
+			@SuppressWarnings("unchecked")
+			Map<Class, PacketType> result = (Map)NETTY.getPacketClassLookup();
+			return result;
+		}
+		return Maps.transformValues(LEGACY.getPacketToID(), new Function<Integer, PacketType>() {
+			public PacketType apply(Integer packetId) {
+				return PacketType.findLegacy(packetId);
+			};
+		});
 	}
 	
 	/**
 	 * Retrieve the injected proxy classes handlig each packet ID.
+	 * <p>
+	 * This is not supported in 1.7.2 and later.
 	 * @return Injected classes.
 	 */
+	@Deprecated
 	public static Map<Integer, Class> getOverwrittenPackets() {
-		return overwrittenPackets;
+		initialize();
+		
+		if (LEGACY != null)
+			return LEGACY.getOverwrittenPackets();
+		throw new IllegalStateException("Not supported on Netty.");
 	}
 	
 	/**
 	 * Retrieve the vanilla classes handling each packet ID.
 	 * @return Vanilla classes.
 	 */
+	@Deprecated
 	public static Map<Integer, Class> getPreviousPackets() {
-		return previousValues;
+		initialize();
+		
+		if (NETTY != null) {
+			// Construct it first
+			if (LEGACY_PREVIOUS_PACKETS == null) {
+				Map<Integer, Class> map = Maps.newHashMap();
+				
+				for (Entry<PacketType, Class<?>> entry : NETTY.getPacketTypeLookup().entrySet()) {
+					map.put(entry.getKey().getLegacyId(), entry.getValue());
+				}
+				LEGACY_PREVIOUS_PACKETS = Collections.unmodifiableMap(map);
+			}
+			return LEGACY_PREVIOUS_PACKETS;
+		}
+		return LEGACY.getPreviousPackets();
 	}
 	
 	/**
 	 * Retrieve every known and supported server packet.
+	 * <p>
+	 * Deprecated: Use {@link #getServerPacketTypes()} instead.
 	 * @return An immutable set of every known server packet.
 	 * @throws FieldAccessException If we're unable to retrieve the server packet data from Minecraft.
 	 */
+	@Deprecated
 	public static Set<Integer> getServerPackets() throws FieldAccessException {
-		initializeSets();
+		initialize();
 		
-		// Sanity check. This is impossible!
-		if (serverPackets != null && serverPackets.size() < MIN_SERVER_PACKETS) 
-			throw new FieldAccessException("Server packet list is empty. Seems to be unsupported");
-		return serverPackets;
+		if (NETTY != null) {
+			if (LEGACY_SERVER_PACKETS == null) {
+				LEGACY_SERVER_PACKETS = toLegacy(NETTY.getServerPackets());
+			}
+			return LEGACY_SERVER_PACKETS;
+		}
+		return LEGACY.getServerPackets();
+	}
+	
+	/**
+	 * Retrieve every known and supported server packet type.
+	 * @return Every server packet type.
+	 */
+	public static Set<PacketType> getServerPacketTypes() {
+		initialize();
+		
+		if (NETTY != null)
+			return NETTY.getServerPackets();
+		
+		// Handle legacy
+		if (NETTY_SERVER_PACKETS == null) {
+			NETTY_SERVER_PACKETS = toPacketTypes(LEGACY.getServerPackets());
+		}
+		return NETTY_SERVER_PACKETS;
 	}
 	
 	/**
 	 * Retrieve every known and supported client packet.
+	 * <p>
+	 * Deprecated: Use {@link #getClientPacketTypes()} instead.
 	 * @return An immutable set of every known client packet.
 	 * @throws FieldAccessException If we're unable to retrieve the client packet data from Minecraft.
 	 */
+	@Deprecated
 	public static Set<Integer> getClientPackets() throws FieldAccessException {
-		initializeSets();
+		initialize();
 		
-		// As above
-		if (clientPackets != null && clientPackets.size() < MIN_CLIENT_PACKETS) 
-			throw new FieldAccessException("Client packet list is empty. Seems to be unsupported");
-		return clientPackets;
+		if (NETTY != null) {
+			if (LEGACY_CLIENT_PACKETS == null) {
+				LEGACY_CLIENT_PACKETS = toLegacy(NETTY.getClientPackets());
+			}
+			return LEGACY_CLIENT_PACKETS;
+		}
+		return LEGACY.getClientPackets();
 	}
 	
-	@SuppressWarnings("unchecked")
-	private static void initializeSets() throws FieldAccessException {
-		if (serverPacketsRef == null || clientPacketsRef == null) {
-			List<Field> sets = getPacketRegistry().getFieldListByType(Set.class);
+	/**
+	 * Retrieve every known and supported server packet type.
+	 * @return Every server packet type.
+	 */
+	public static Set<PacketType> getClientPacketTypes() {
+		initialize();
 		
-			try {
-				if (sets.size() > 1) {
-					serverPacketsRef = (Set<Integer>) FieldUtils.readStaticField(sets.get(0), true);
-					clientPacketsRef = (Set<Integer>) FieldUtils.readStaticField(sets.get(1), true);
+		if (NETTY != null)
+			return NETTY.getClientPackets();
 		
-					// Impossible
-					if (serverPacketsRef == null || clientPacketsRef == null)
-						throw new FieldAccessException("Packet sets are in an illegal state.");
-					
-					// NEVER allow callers to modify the underlying sets
-					serverPackets = ImmutableSet.copyOf(serverPacketsRef);
-					clientPackets = ImmutableSet.copyOf(clientPacketsRef);
-					
-					// Check sizes
-					if (serverPackets.size() < MIN_SERVER_PACKETS)
-						ProtocolLibrary.getErrorReporter().reportWarning(
-							PacketRegistry.class, Report.newBuilder(REPORT_INSUFFICIENT_SERVER_PACKETS).messageParam(serverPackets.size())
-						);
-					if (clientPackets.size() < MIN_CLIENT_PACKETS)
-						ProtocolLibrary.getErrorReporter().reportWarning(
-								PacketRegistry.class, Report.newBuilder(REPORT_INSUFFICIENT_CLIENT_PACKETS).messageParam(clientPackets.size())
-							);
-					
-				} else {
-					throw new FieldAccessException("Cannot retrieve packet client/server sets.");
+		// Handle legacy
+		if (NETTY_CLIENT_PACKETS == null) {
+			NETTY_CLIENT_PACKETS = toPacketTypes(LEGACY.getClientPackets());
+		}
+		return NETTY_CLIENT_PACKETS;
 	}
 	
-			} catch (IllegalAccessException e) {
-				throw new FieldAccessException("Cannot access field.", e);
+	/**
+	 * Convert a set of packet types to a set of integers based on the legacy packet ID.
+	 * @param types - packet type.
+	 * @return Set of integers.
+	 */
+	private static Set<Integer> toLegacy(Set<PacketType> types) { 
+		Set<Integer> result = Sets.newHashSet();
+		
+		for (PacketType type : types)
+			result.add(type.getLegacyId());
+		return Collections.unmodifiableSet(result);
 	}
 	
-		} else {
-			// Copy over again if it has changed
-			if (serverPacketsRef != null && serverPacketsRef.size() != serverPackets.size())
-				serverPackets = ImmutableSet.copyOf(serverPacketsRef);
-			if (clientPacketsRef != null && clientPacketsRef.size() != clientPackets.size())
-				clientPackets = ImmutableSet.copyOf(clientPacketsRef);
-		}
+	/**
+	 * Convert a set of legacy packet IDs to packet types.
+	 * @param types - legacy packet IDs.
+	 * @return Set of packet types.
+	 */
+	private static Set<PacketType> toPacketTypes(Set<Integer> ids) { 
+		Set<PacketType> result = Sets.newHashSet();
+		
+		for (int id : ids)
+			result.add(PacketType.findLegacy(id));
+		return Collections.unmodifiableSet(result);
 	}
 	
 	/**
 	 * Retrieves the correct packet class from a given packet ID.
+	 * <p>
+	 * Deprecated: Use {@link #getPacketClassFromType(PacketType)} instead.
 	 * @param packetID - the packet ID.
 	 * @return The associated class.
 	 */
+	@Deprecated
 	public static Class getPacketClassFromID(int packetID) {
-		return getPacketClassFromID(packetID, false);
+		initialize();
+		
+		if (NETTY != null)
+			return NETTY.getPacketTypeLookup().get(PacketType.findLegacy(packetID));
+		return LEGACY.getPacketClassFromID(packetID);
+	}
+	
+	/**
+	 * Retrieves the correct packet class from a given type.
+	 * @param type - the packet type.
+	 * @return The associated class.
+	 */
+	public static Class getPacketClassFromType(PacketType type) {
+		return getPacketClassFromType(type, false);
+	}
+	
+	/**
+	 * Retrieves the correct packet class from a given type.
+	 * <p>
+	 * Note that forceVanillla will be ignored on MC 1.7.2 and later.
+	 * @param type - the packet type.
+	 * @param forceVanilla - whether or not to look for vanilla classes, not injected classes.
+	 * @return The associated class.
+	 */
+	public static Class getPacketClassFromType(PacketType type, boolean forceVanilla) {
+		initialize();
+		
+		if (NETTY != null)
+			return NETTY.getPacketTypeLookup().get(type);
+		return LEGACY.getPacketClassFromID(type.getLegacyId(), forceVanilla);
 	}
 	
 	/**
 	 * Retrieves the correct packet class from a given packet ID.
+	 * <p>
+	 * This method has been deprecated.
 	 * @param packetID - the packet ID.
  	 * @param forceVanilla - whether or not to look for vanilla classes, not injected classes.
 	 * @return The associated class.
 	 */
+	@Deprecated
 	public static Class getPacketClassFromID(int packetID, boolean forceVanilla) {
-		Map<Integer, Class> lookup = forceVanilla ? previousValues : overwrittenPackets;
-		Class<?> result = null;
+		initialize();
 		
-		// Optimized lookup
-		if (lookup.containsKey(packetID)) {
-			return removeEnhancer(lookup.get(packetID), forceVanilla);
-		}
-		
-		// Refresh lookup tables
-		getPacketToID();
-
-		// See if we can look for non-vanilla classes
-		if (!forceVanilla) {
-			result = Iterables.getFirst(customIdToPacket.get(packetID), null);
-		}
-		if (result == null) {
-			result = vanillaIdToPacket.get(packetID);
-		}
-		
-		// See if we got it
-		if (result != null)
-			return result;
-		else
-			throw new IllegalArgumentException("The packet ID " + packetID + " is not registered.");
+		if (LEGACY != null)
+			return LEGACY.getPacketClassFromID(packetID, forceVanilla);
+		return getPacketClassFromID(packetID);
 	}
 	
 	/**
 	 * Retrieve the packet ID of a given packet.
+	 * <p>
+	 * Deprecated: Use {@link #getPacketType(Class)}.
 	 * @param packet - the type of packet to check.
-	 * @return The ID of the given packet.
+	 * @return The legacy ID of the given packet.
 	 * @throws IllegalArgumentException If this is not a valid packet.
 	 */
+	@Deprecated
 	public static int getPacketID(Class<?> packet) {
-		if (packet == null)
-			throw new IllegalArgumentException("Packet type class cannot be NULL.");
-		if (!MinecraftReflection.getPacketClass().isAssignableFrom(packet))
-			throw new IllegalArgumentException("Type must be a packet.");
+		initialize();
 		
-		// The registry contains both the overridden and original packets
-		return getPacketToID().get(packet);
+		if (NETTY != null)
+			return NETTY.getPacketClassLookup().get(packet).getLegacyId();
+		return LEGACY.getPacketID(packet);
 	}
 	
 	/**
-	 * Find the first superclass that is not a CBLib proxy object.
-	 * @param clazz - the class whose hierachy we're going to search through.
-	 * @param remove - whether or not to skip enhanced (proxy) classes.
-	 * @return If remove is TRUE, the first superclass that is not a proxy.
+	 * Retrieve the packet type of a given packet.
+	 * @param packet - the class of the packet.
+	 * @return The packet type.
+	 * @throws IllegalArgumentException If this is not a valid packet.
 	 */
-	private static Class removeEnhancer(Class clazz, boolean remove) {
-		if (remove) {
-			// Get the underlying vanilla class
-			while (Factory.class.isAssignableFrom(clazz) && !clazz.equals(Object.class)) {
-				clazz = clazz.getSuperclass();
-			}
-		}
+	public static PacketType getPacketType(Class<?> packet) {
+		initialize();
 		
-		return clazz;
+		if (NETTY != null)
+			return NETTY.getPacketClassLookup().get(packet);
+		return PacketType.findLegacy(LEGACY.getPacketID(packet));
 	}
 }

ProtocolLib/src/main/java/com/comphenix/protocol/injector/spigot/AbstractPacketInjector.java

@@ -0,0 +1,52 @@
+package com.comphenix.protocol.injector.spigot;
+
+import java.util.Set;
+
+import com.comphenix.protocol.concurrency.IntegerSet;
+import com.comphenix.protocol.injector.packet.PacketInjector;
+
+public abstract class AbstractPacketInjector implements PacketInjector {
+	private IntegerSet reveivedFilters;
+	
+	public AbstractPacketInjector(IntegerSet reveivedFilters) {
+		this.reveivedFilters = reveivedFilters;
+	}
+
+	@Override
+	public boolean isCancelled(Object packet) {
+		// No, it's never cancelled
+		return false;
+	}
+
+	@Override
+	public void setCancelled(Object packet, boolean cancelled) {
+		throw new UnsupportedOperationException();
+	}
+
+	@Override
+	public boolean addPacketHandler(int packetID) {
+		reveivedFilters.add(packetID);
+		return true;
+	}
+
+	@Override
+	public boolean removePacketHandler(int packetID) {
+		reveivedFilters.remove(packetID);
+		return true;
+	}
+
+	@Override
+	public boolean hasPacketHandler(int packetID) {
+		return reveivedFilters.contains(packetID);
+	}
+
+	@Override
+	public Set<Integer> getPacketHandlers() {
+		return reveivedFilters.toSet();
+	}
+
+	@Override
+	public void cleanupAll() {
+		reveivedFilters.clear();
+	}
+}

ProtocolLib/src/main/java/com/comphenix/protocol/injector/spigot/AbstractPlayerHandler.java

@@ -0,0 +1,81 @@
+package com.comphenix.protocol.injector.spigot;
+
+import java.io.DataInputStream;
+import java.util.Set;
+
+import org.bukkit.entity.Player;
+
+import com.comphenix.protocol.concurrency.IntegerSet;
+import com.comphenix.protocol.events.PacketListener;
+import com.comphenix.protocol.injector.GamePhase;
+import com.comphenix.protocol.injector.PacketFilterManager.PlayerInjectHooks;
+import com.comphenix.protocol.injector.player.PlayerInjectionHandler;
+
+public abstract class AbstractPlayerHandler implements PlayerInjectionHandler {
+	protected IntegerSet sendingFilters;
+
+	public AbstractPlayerHandler(IntegerSet sendingFilters) {
+		this.sendingFilters = sendingFilters;
+	}
+
+	@Override
+	public void setPlayerHook(GamePhase phase, PlayerInjectHooks playerHook) {
+		throw new UnsupportedOperationException("This is not needed in Spigot.");
+	}
+
+	@Override
+	public void setPlayerHook(PlayerInjectHooks playerHook) {
+		throw new UnsupportedOperationException("This is not needed in Spigot.");
+	}
+
+	@Override
+	public void addPacketHandler(int packetID) {
+		sendingFilters.add(packetID);
+	}
+
+	@Override
+	public void removePacketHandler(int packetID) {
+		sendingFilters.remove(packetID);
+	}
+
+	@Override
+	public Set<Integer> getSendingFilters() {
+		return sendingFilters.toSet();
+	}
+
+	@Override
+	public void close() {
+		sendingFilters.clear();
+	}
+
+	@Override
+	public PlayerInjectHooks getPlayerHook(GamePhase phase) {
+		return PlayerInjectHooks.NETWORK_SERVER_OBJECT;
+	}
+
+	@Override
+	public boolean canRecievePackets() {
+		return true;
+	}
+
+	@Override
+	public PlayerInjectHooks getPlayerHook() {
+		// Pretend that we do
+		return PlayerInjectHooks.NETWORK_SERVER_OBJECT;
+	}
+
+	@Override
+	public Player getPlayerByConnection(DataInputStream inputStream) throws InterruptedException {
+		throw new UnsupportedOperationException("This is not needed in Spigot.");
+	}
+
+	@Override
+	public void checkListener(PacketListener listener) {
+		// They're all fine!
+	}
+
+	@Override
+	public void checkListener(Set<PacketListener> listeners) {
+		// Yes, really
+	}
+}

ProtocolLib/src/main/java/com/comphenix/protocol/injector/spigot/DummyPacketInjector.java

@@ -16,26 +16,13 @@ import com.google.common.collect.Sets;
  * 
  * @author Kristian
  */
-class DummyPacketInjector implements PacketInjector {
+class DummyPacketInjector extends AbstractPacketInjector implements PacketInjector {
 	private SpigotPacketInjector injector;	
-	private IntegerSet reveivedFilters;
-	
 	private IntegerSet lastBufferedPackets = new IntegerSet(Packets.MAXIMUM_PACKET_ID + 1);
 
 	public DummyPacketInjector(SpigotPacketInjector injector, IntegerSet reveivedFilters) {
+		super(reveivedFilters);
 		this.injector = injector;
-		this.reveivedFilters = reveivedFilters;
-	}
-
-	@Override
-	public boolean isCancelled(Object packet) {
-		// No, it's never cancelled
-		return false;
-	}
-	
-	@Override
-	public void setCancelled(Object packet, boolean cancelled) {
-		throw new UnsupportedOperationException();
 	}
 
 	@Override
@@ -52,35 +39,8 @@ class DummyPacketInjector implements PacketInjector {
 		}
 	}
 
-	@Override
-	public boolean addPacketHandler(int packetID) {
-		reveivedFilters.add(packetID);
-		return true;
-	}
-
-	@Override
-	public boolean removePacketHandler(int packetID) {
-		reveivedFilters.remove(packetID);
-		return true;
-	}
-
-	@Override
-	public boolean hasPacketHandler(int packetID) {
-		return reveivedFilters.contains(packetID);
-	}
-
-	@Override
-	public Set<Integer> getPacketHandlers() {
-		return reveivedFilters.toSet();
-	}
-
 	@Override
 	public PacketEvent packetRecieved(PacketContainer packet, Player client, byte[] buffered) {
 		return injector.packetReceived(packet, client, buffered);
 	}
-
-	@Override
-	public void cleanupAll() {
-		reveivedFilters.clear();
-	}
 }

ProtocolLib/src/main/java/com/comphenix/protocol/injector/spigot/DummyPlayerHandler.java

@@ -1,33 +1,25 @@
 package com.comphenix.protocol.injector.spigot;
 
-import java.io.DataInputStream;
 import java.io.InputStream;
 import java.lang.reflect.InvocationTargetException;
 import java.net.InetSocketAddress;
-import java.util.Set;
 import org.bukkit.entity.Player;
 
 import com.comphenix.protocol.concurrency.IntegerSet;
 import com.comphenix.protocol.events.NetworkMarker;
 import com.comphenix.protocol.events.PacketContainer;
 import com.comphenix.protocol.events.PacketEvent;
-import com.comphenix.protocol.events.PacketListener;
-import com.comphenix.protocol.injector.GamePhase;
-import com.comphenix.protocol.injector.PacketFilterManager.PlayerInjectHooks;
-import com.comphenix.protocol.injector.player.PlayerInjectionHandler;
 
 /**
  * Dummy player handler that simply delegates to its parent Spigot packet injector.
  * 
  * @author Kristian
  */
-class DummyPlayerHandler implements PlayerInjectionHandler {
+class DummyPlayerHandler extends AbstractPlayerHandler {
 	private SpigotPacketInjector injector;
-	private IntegerSet sendingFilters;
-	
 	public DummyPlayerHandler(SpigotPacketInjector injector, IntegerSet sendingFilters) {
+		super(sendingFilters);
 		this.injector = injector;
-		this.sendingFilters = sendingFilters;
 	}
 
 	@Override
@@ -41,36 +33,6 @@ class DummyPlayerHandler implements PlayerInjectionHandler {
 		return true;
 	}
 	
-	@Override
-	public void setPlayerHook(GamePhase phase, PlayerInjectHooks playerHook) {
-		throw new UnsupportedOperationException("This is not needed in Spigot.");
-	}
-	
-	@Override
-	public void setPlayerHook(PlayerInjectHooks playerHook) {
-		throw new UnsupportedOperationException("This is not needed in Spigot.");
-	}
-
-	@Override
-	public void addPacketHandler(int packetID) {
-		sendingFilters.add(packetID);
-	}
-	
-	@Override
-	public void removePacketHandler(int packetID) {
-		sendingFilters.remove(packetID);
-	}
-	
-	@Override
-	public Set<Integer> getSendingFilters() {
-		return sendingFilters.toSet();
-	}
-	
-	@Override
-	public void close() {
-		sendingFilters.clear();
-	}
-	
 	@Override
 	public void sendServerPacket(Player reciever, PacketContainer packet, NetworkMarker marker, boolean filters) throws InvocationTargetException {
 		injector.sendServerPacket(reciever, packet, marker, filters);
@@ -92,16 +54,6 @@ class DummyPlayerHandler implements PlayerInjectionHandler {
 		// Just ignore
 	}
 	
-	@Override
-	public PlayerInjectHooks getPlayerHook(GamePhase phase) {
-		return PlayerInjectHooks.NETWORK_SERVER_OBJECT;
-	}
-	
-	@Override
-	public boolean canRecievePackets() {
-		return true;
-	}
-
 	@Override
 	public PacketEvent handlePacketRecieved(PacketContainer packet, InputStream input, byte[] buffered) {
 		// Associate this buffered data
@@ -111,27 +63,6 @@ class DummyPlayerHandler implements PlayerInjectionHandler {
 		return null;
 	}
 	
-	@Override
-	public PlayerInjectHooks getPlayerHook() {
-		// Pretend that we do
-		return PlayerInjectHooks.NETWORK_SERVER_OBJECT;
-	}
-	
-	@Override
-	public Player getPlayerByConnection(DataInputStream inputStream) throws InterruptedException {
-		throw new UnsupportedOperationException("This is not needed in Spigot.");
-	}
-	
-	@Override
-	public void checkListener(PacketListener listener) {
-		// They're all fine!
-	}
-	
-	@Override
-	public void checkListener(Set<PacketListener> listeners) {
-		// Yes, really
-	}
-	
 	@Override
 	public void updatePlayer(Player player) {
 		// Do nothing

ProtocolLib/src/main/java/com/comphenix/protocol/reflect/FuzzyReflection.java

@@ -19,6 +19,7 @@ package com.comphenix.protocol.reflect;
 
 import java.lang.reflect.Constructor;
 import java.lang.reflect.Field;
+import java.lang.reflect.InvocationTargetException;
 import java.lang.reflect.Method;
 import java.util.ArrayList;
 import java.util.Arrays;
@@ -28,6 +29,8 @@ import java.util.Map;
 import java.util.Set;
 import java.util.regex.Pattern;
 
+import net.minecraft.util.com.google.common.collect.Sets;
+
 import com.comphenix.protocol.reflect.fuzzy.AbstractFuzzyMatcher;
 import com.google.common.collect.Lists;
 import com.google.common.collect.Maps;
@@ -38,6 +41,33 @@ import com.google.common.collect.Maps;
  * @author Kristian
  */
 public class FuzzyReflection {
+	/**
+	 * Represents an interface for accessing a field.
+	 * @author Kristian
+	 */
+	public interface FieldAccessor {
+		/**
+		 * Retrieve the value of a field for a particular instance.
+		 * @param instance - the instance, or NULL for a static field.
+		 * @return The value of the field.
+		 * @throws IllegalStateException If the current security context prohibits reflection.
+		 */
+		public Object get(Object instance);
+	}
+	
+	/**
+	 * Represents an interface for invoking a method.
+	 * @author Kristian 
+	 */
+	public interface MethodAccessor {
+		/**
+		 * Invoke the underlying method.
+		 * @param target - the target instance, or NULL for a static method.
+		 * @param args - the arguments to pass to the method.
+		 * @return The return value, or NULL for void methods.
+		 */
+		public Object invoke(Object target, Object... args);
+	}
 	
 	// The class we're actually representing
 	private Class<?> source;
@@ -88,6 +118,88 @@ public class FuzzyReflection {
 		return new FuzzyReflection(reference.getClass(), forceAccess);
 	}
 	
+	/**
+	 * Retrieve an accessor for the first field of the given type.
+	 * @param instanceClass - the type of the instance to retrieve.
+	 * @param fieldClass - type of the field to retrieve.
+	 * @param forceAccess - whether or not to look for private and protected fields.
+	 * @return The value of that field.
+	 * @throws IllegalArgumentException If the field cannot be found.
+	 */
+	public static FieldAccessor getFieldAccessor(Class<?> instanceClass, Class<?> fieldClass, boolean forceAccess) {	
+		// Get a field accessor
+		Field field = FuzzyReflection.fromObject(instanceClass, forceAccess).getFieldByType(null, fieldClass);
+		field.setAccessible(true);
+		return getFieldAccessor(field);
+	}
+	
+	/**
+	 * Retrieve a field accessor from a given field that uses unchecked exceptions.
+	 * @param field - the field.
+	 * @return The field accessor.
+	 */
+	public static FieldAccessor getFieldAccessor(final Field field) {
+		return new FieldAccessor() {
+			@Override
+			public Object get(Object instance) {
+				try {
+					return field.get(instance);
+				} catch (IllegalAccessException e) {
+					throw new IllegalStateException("Cannot use reflection.", e);
+				}
+			}
+		};
+	}
+	
+	/**
+	 * Retrieve a method accessor for a method with the given name and signature.
+	 * @param instanceClass - the parent class.
+	 * @param name - the method name.
+	 * @param parameters - the parameters.
+	 * @return The method accessor.
+	 */
+	public static MethodAccessor getMethodAccessor(Class<?> instanceClass, String name, Class<?>... parameters) {
+		Method method = MethodUtils.getAccessibleMethod(instanceClass, name, parameters);	
+		method.setAccessible(true);
+		return getMethodAccessor(method);
+	}
+	
+	/**
+	 * Retrieve a method accessor for a particular method, avoding checked exceptions.
+	 * @param method - the method to access.
+	 * @return The method accessor.
+	 */
+	public static MethodAccessor getMethodAccessor(final Method method) {
+		return new MethodAccessor() {
+			@Override
+			public Object invoke(Object target, Object... args) {
+				try {
+					return method.invoke(target, args);
+				} catch (IllegalAccessException e) {
+					throw new IllegalStateException("Cannot use reflection.", e);
+				} catch (InvocationTargetException e) {
+					throw new RuntimeException("An internal error occured.", e.getCause());
+				} catch (IllegalArgumentException e) {
+					throw e;
+				}
+			}
+		};
+	}
+	
+	/**
+	 * Retrieve the value of the first field of the given type.
+	 * @param instance - the instance to retrieve from.
+	 * @param fieldClass - type of the field to retrieve.
+	 * @param forceAccess - whether or not to look for private and protected fields.
+	 * @return The value of that field.
+	 * @throws IllegalArgumentException If the field cannot be found.
+	 */
+	public static <T> T getFieldValue(Object instance, Class<T> fieldClass, boolean forceAccess) {
+		@SuppressWarnings("unchecked")
+		T result = (T) getFieldAccessor(instance.getClass(), fieldClass, forceAccess).get(instance);
+		return result;
+	}
+	
 	/**
 	 * Retrieves the underlying class.
 	 */
@@ -95,6 +207,44 @@ public class FuzzyReflection {
 		return source;
 	}
 		
+	/**
+	 * Retrieve the singleton instance of a class, from a method or field.
+	 * @return The singleton instance.
+	 * @throws IllegalStateException If the class has no singleton.
+	 */
+	public Object getSingleton() {	
+		Method method = null;
+		Field field = null;
+		
+		try {
+			method = getMethodByParameters("getInstance", source.getClass(), new Class<?>[0]);
+		} catch (IllegalArgumentException e) {
+			// Try getting the field instead
+			// Note that this will throw an exception if not found
+			field = getFieldByType("instance", source.getClass());
+		}
+
+		// Convert into unchecked exceptions
+		if (method != null) {
+			try {
+				method.setAccessible(true);
+				return method.invoke(null);
+			} catch (Exception e) {
+				throw new RuntimeException("Cannot invoke singleton method " + method, e);
+			}
+		}
+		if (field != null) {
+			try {
+				field.setAccessible(true);
+				return field.get(null);
+			} catch (Exception e) {
+				throw new IllegalArgumentException("Cannot get content of singleton field " + field, e);
+			}
+		}
+		// We should never get to this point
+		throw new IllegalStateException("Impossible.");
+	}
+	
 	/**
 	 * Retrieve the first method that matches.
 	 * <p>
@@ -246,7 +396,6 @@ public class FuzzyReflection {
 				methods.add(method);
 			}
 		}
-		
 		return methods;
 	}
 	
@@ -473,6 +622,25 @@ public class FuzzyReflection {
 			return setUnion(source.getFields());
 	}
 	
+	/**
+	 * Retrieves all private and public fields, up until a certain superclass.
+	 * @param excludeClass - the class (and its superclasses) to exclude from the search.
+	 * @return Every such declared field.
+	 */
+	public Set<Field> getDeclaredFields(Class<?> excludeClass) {
+		if (forceAccess) {
+			Class<?> current = source;
+			Set<Field> fields = Sets.newLinkedHashSet();
+			
+			while (current != null && current != excludeClass) {
+				fields.addAll(Arrays.asList(current.getDeclaredFields()));
+				current = current.getSuperclass();
+			}
+			return fields;
+		}
+		return getFields();
+	}
+	
 	/**
 	 * Retrieves all private and public methods in declared order (after JDK 1.5).
 	 * <p>
@@ -509,7 +677,6 @@ public class FuzzyReflection {
 				result.add(element);
 			}
 		}
-		
 		return result;
 	}
 	

ProtocolLib/src/main/java/com/comphenix/protocol/reflect/ObjectEnum.java

@@ -18,7 +18,9 @@
 package com.comphenix.protocol.reflect;
 
 import java.lang.reflect.Field;
+import java.lang.reflect.Modifier;
 import java.util.HashSet;
+import java.util.Iterator;
 import java.util.Set;
 
 import com.google.common.collect.BiMap;
@@ -31,27 +33,32 @@ import com.google.common.collect.HashBiMap;
  * want to prevent the creation of additional members dynamically.
  * @author Kristian
  */
-public class ObjectEnum<T> {
+public class ObjectEnum<T> implements Iterable<T> {
 	// Used to convert between IDs and names
 	protected BiMap<T, String> members = HashBiMap.create();
 	
 	/**
 	 * Registers every declared integer field.
 	 */
-	public ObjectEnum() {
-		registerAll();
+	public ObjectEnum(Class<T> fieldType) {
+		registerAll(fieldType);
 	}
 	
 	/**
-	 * Registers every public int field as a member.
+	 * Registers every public assignable static field as a member.
 	 */
 	@SuppressWarnings("unchecked")
-	protected void registerAll() {
+	protected void registerAll(Class<T> fieldType) {
 		try {
 			// Register every int field
 			for (Field entry : this.getClass().getFields()) {
-				if (entry.getType().equals(int.class)) {
-					registerMember((T) entry.get(this), entry.getName());
+				if (Modifier.isStatic(entry.getModifiers()) && fieldType.isAssignableFrom(entry.getType())) {
+					T value = (T) entry.get(null);
+					
+					if (value == null)
+						throw new IllegalArgumentException("Field " + entry + " was NULL. Remember to " + 
+								"construct the object after the field has been declared.");
+					registerMember(value, entry.getName());
 				}
 			}
 		
@@ -63,13 +70,17 @@ public class ObjectEnum<T> {
 	}
 	
 	/**
-	 * Registers a member.
+	 * Registers a member if its not present.
 	 * @param instance - member instance.
 	 * @param name - name of member.
+	 * @return TRUE if the member was registered, FALSE otherwise.
 	 */
-	protected void registerMember(T instance, String name) {
+	public boolean registerMember(T instance, String name) {
+		if (!members.containsKey(instance)) {
 			members.put(instance, name);	
-		
+			return true;
+		}
+		return false;
 	}
 	
 	/**
@@ -106,4 +117,9 @@ public class ObjectEnum<T> {
 	public Set<T> values() {
 		return new HashSet<T>(members.keySet());
 	}
+
+	@Override
+	public Iterator<T> iterator() {
+		return members.keySet().iterator();
+	}
 }

ProtocolLib/src/main/java/com/comphenix/protocol/reflect/StructureModifier.java

@@ -581,7 +581,7 @@ public class StructureModifier<TField> {
 		List<Field> result = new ArrayList<Field>();
 		
 		// Retrieve every private and public field
-		for (Field field : FuzzyReflection.fromClass(type, true).getFields()) {
+		for (Field field : FuzzyReflection.fromClass(type, true).getDeclaredFields(superclassExclude)) {
 			int mod = field.getModifiers();
 			
 			// Ignore static and "abstract packet" fields
@@ -595,6 +595,4 @@ public class StructureModifier<TField> {
 		
 		return result;
 	}
-
-
 }

ProtocolLib/src/main/java/com/comphenix/protocol/reflect/cloning/ImmutableDetector.java

@@ -72,7 +72,7 @@ public class ImmutableDetector implements Cloner {
 		if (Primitives.isWrapperType(type) || String.class.equals(type))
 			return true;
 		// May not be true, but if so, that kind of code is broken anyways
-		if (type.isEnum())
+		if (isEnumWorkaround(type))
 			return true;
 			
 		for (Class<?> clazz : immutableClasses)
@@ -83,6 +83,16 @@ public class ImmutableDetector implements Cloner {
 		return false;
 	}
 	
+	// This is just great. Just great.
+	private static boolean isEnumWorkaround(Class<?> enumClass) {
+		while (enumClass != null) {
+			if (enumClass.isEnum())
+				return true;
+			enumClass = enumClass.getSuperclass();
+		}
+		return false;
+	}
+	
 	@Override
 	public Object clone(Object source) {
 		// Safe if the class is immutable

ProtocolLib/src/main/java/com/comphenix/protocol/utility/MinecraftFields.java

@@ -0,0 +1,56 @@
+package com.comphenix.protocol.utility;
+
+import org.bukkit.entity.Player;
+
+import com.comphenix.protocol.injector.BukkitUnwrapper;
+import com.comphenix.protocol.reflect.FuzzyReflection;
+import com.comphenix.protocol.reflect.FuzzyReflection.FieldAccessor;
+
+/**
+ * Retrieve the content of well-known fields in Minecraft.
+ * @author Kristian
+ */
+public class MinecraftFields {
+	// Cached accessors
+	private static volatile FieldAccessor CONNECTION_ACCESSOR;
+	private static volatile FieldAccessor NETWORK_ACCESSOR;
+	
+	private MinecraftFields() {
+		// Not constructable
+	}
+	
+	/**
+	 * Retrieve the network mananger associated with a particular player.
+	 * @param player - the player.
+	 * @return The network manager.
+	 */
+	public static Object getNetworkManager(Player player) {
+		Object nmsPlayer = BukkitUnwrapper.getInstance().unwrapItem(player);
+		
+		if (NETWORK_ACCESSOR == null) {
+			Class<?> networkClass = MinecraftReflection.getNetworkManagerClass();
+			Class<?> connectionClass = MinecraftReflection.getNetServerHandlerClass();
+			NETWORK_ACCESSOR = FuzzyReflection.getFieldAccessor(connectionClass, networkClass, true);
+		}
+		// Retrieve the network manager
+		return NETWORK_ACCESSOR.get(getPlayerConnection(nmsPlayer));
+	}
+	
+	/**
+	 * Retrieve the player connection (or NetServerHandler) associated with a player.
+	 * @param player - the player.
+	 * @return The player connection.
+	 */
+	public static Object getPlayerConnection(Player player) {
+		return getPlayerConnection(BukkitUnwrapper.getInstance().unwrapItem(player));
+	}
+	
+	// Retrieve player connection from a native instance
+	private static Object getPlayerConnection(Object nmsPlayer) {
+		if (CONNECTION_ACCESSOR == null) {
+			Class<?> connectionClass = MinecraftReflection.getNetServerHandlerClass();
+			CONNECTION_ACCESSOR = FuzzyReflection.getFieldAccessor(nmsPlayer.getClass(), connectionClass, true);
+		}
+		return CONNECTION_ACCESSOR.get(nmsPlayer);
+	}
+}

ProtocolLib/src/main/java/com/comphenix/protocol/utility/MinecraftMethods.java

@@ -1,8 +1,24 @@
 package com.comphenix.protocol.utility;
 
+import java.lang.reflect.InvocationHandler;
+import java.lang.reflect.InvocationTargetException;
 import java.lang.reflect.Method;
+import java.lang.reflect.Proxy;
+import java.util.List;
 import java.util.Map;
 
+import org.bukkit.command.defaults.EnchantCommand;
+
+import net.minecraft.util.io.netty.buffer.ByteBuf;
+import net.minecraft.util.io.netty.buffer.UnpooledByteBufAllocator;
+import net.minecraft.util.io.netty.channel.ChannelHandlerContext;
+import net.minecraft.util.io.netty.util.concurrent.GenericFutureListener;
+import net.sf.cglib.proxy.Enhancer;
+import net.sf.cglib.proxy.MethodInterceptor;
+import net.sf.cglib.proxy.MethodProxy;
+
+import com.comphenix.protocol.PacketType;
+import com.comphenix.protocol.events.PacketContainer;
 import com.comphenix.protocol.reflect.FuzzyReflection;
 
 /**
@@ -14,6 +30,14 @@ public class MinecraftMethods {
 	// For player connection
 	private volatile static Method sendPacketMethod;
 	
+	// For network manager
+	private volatile static Method networkManagerHandle;
+	private volatile static Method networkManagerPacketRead;
+	
+	// For packet
+	private volatile static Method packetReadByteBuf;
+	private volatile static Method packetWriteByteBuf;
+	
 	/**
 	 * Retrieve the send packet method in PlayerConnection/NetServerHandler.
 	 * @return The send packet method.
@@ -47,6 +71,50 @@ public class MinecraftMethods {
 		return sendPacketMethod;
 	}
 	
+	/**
+	 * Retrieve the disconnect method for a given player connection.
+	 * @param playerConnection - the player connection.
+	 * @return The 
+	 */
+	public static Method getDisconnectMethod(Class<? extends Object> playerConnection) {
+		try {
+			return FuzzyReflection.fromClass(playerConnection).getMethodByName("disconnect.*");
+		} catch (IllegalArgumentException e) {
+			// Just assume it's the first String method
+			return FuzzyReflection.fromObject(playerConnection).getMethodByParameters("disconnect", String.class);
+		}
+	}
+	
+	/**
+	 * Retrieve the handle(Packet, GenericFutureListener[]) method of network manager.
+	 * <p>
+	 * This only exists in version 1.7.2 and above.
+	 * @return The handle method.
+	 */
+	public static Method getNetworkManagerHandleMethod() {
+		if (networkManagerHandle == null) {
+			networkManagerHandle = FuzzyReflection.fromClass(MinecraftReflection.getNetworkManagerClass(), true).
+					getMethodByParameters("handle", MinecraftReflection.getPacketClass(), GenericFutureListener[].class);
+			networkManagerHandle.setAccessible(true);
+		}
+		return networkManagerHandle;
+	}
+	
+	/**
+	 * Retrieve the packetRead(ChannelHandlerContext, Packet) method of NetworkMananger.
+	 * <p>
+	 * This only exists in version 1.7.2 and above.
+	 * @return The packetRead method.
+	 */
+	public static Method getNetworkManagerReadPacketMethod() {
+		if (networkManagerPacketRead == null) {
+			networkManagerPacketRead = FuzzyReflection.fromClass(MinecraftReflection.getNetworkManagerClass(), true).
+					getMethodByParameters("packetRead", ChannelHandlerContext.class, MinecraftReflection.getPacketClass());
+			networkManagerPacketRead.setAccessible(true);
+		}
+		return networkManagerPacketRead;
+	}
+
 	/**
 	 * Retrieve a method mapped list of every method with the given signature.
 	 * @param source - class source.
@@ -61,4 +129,104 @@ public class MinecraftMethods {
 		);
 	}
 
+	/**
+	 * Retrieve the Packet.read(PacketDataSerializer) method.
+	 * <p>
+	 * This only exists in version 1.7.2 and above.
+	 * @return The packet read method.
+	 */
+	public static Method getPacketReadByteBufMethod()  {
+		initializePacket();
+		return packetReadByteBuf;
+	}
+	
+	/**
+	 * Retrieve the Packet.write(PacketDataSerializer) method.
+	 * <p>
+	 * This only exists in version 1.7.2 and above.
+	 * @return The packet write method.
+	 */
+	public static Method getPacketWriteByteBufMethod()  {
+		initializePacket();
+		return packetWriteByteBuf;
+	}
+	
+	/**
+	 * Initialize the two read() and write() methods.
+	 */
+	private static void initializePacket() {
+		// Initialize the methods
+		if (packetReadByteBuf == null || packetWriteByteBuf == null) {
+			// This object will allow us to detect which methods were called
+			Enhancer enhancer = new Enhancer();
+			enhancer.setSuperclass(MinecraftReflection.getPacketDataSerializerClass());
+			enhancer.setCallback(new MethodInterceptor() {
+				@Override
+				public Object intercept(Object obj, Method method, Object[] args, MethodProxy proxy)
+						throws Throwable {
+					if (method.getName().contains("read"))
+						throw new ReadMethodException();
+					if (method.getName().contains("write"))
+						throw new WriteMethodException();
+					return proxy.invokeSuper(obj, args);
+				}
+			});
+			
+			// Create our proxy object
+			Object javaProxy = enhancer.create(
+				new Class<?>[] { ByteBuf.class }, 
+				new Object[]   { UnpooledByteBufAllocator.DEFAULT.buffer() }
+			);
+			
+			Object lookPacket = new PacketContainer(PacketType.Play.Client.PLACE).getHandle();
+			List<Method> candidates = FuzzyReflection.fromClass(MinecraftReflection.getPacketClass()).
+				getMethodListByParameters(Void.TYPE, new Class<?>[] { MinecraftReflection.getPacketDataSerializerClass() });
+			
+			// Look through all the methods
+			for (Method method : candidates) {
+				try {
+					method.invoke(lookPacket, javaProxy);
+				} catch (InvocationTargetException e) {
+					if (e.getCause() instanceof ReadMethodException)
+						// Must be the reader
+						packetReadByteBuf = method;
+					else if (e.getCause() instanceof WriteMethodException) 
+						packetWriteByteBuf = method;
+					else
+						throw new RuntimeException("Inner exception.", e);
+				} catch (Exception e) {
+					throw new RuntimeException("Generic reflection error.", e);
+				}
+			}
+			
+			if (packetReadByteBuf == null)
+				throw new IllegalStateException("Unable to find Packet.read(PacketDataSerializer)");
+			if (packetWriteByteBuf == null)
+				throw new IllegalStateException("Unable to find Packet.write(PacketDataSerializer)");
+		}
+	}
+	
+	/**
+	 * An internal exception used to detect read methods.
+	 * @author Kristian
+	 */
+	private static class ReadMethodException extends RuntimeException {
+		private static final long serialVersionUID = 1L;
+
+		public ReadMethodException() {
+			super("A read method was executed.");
+		}	
+	}
+	
+	/**
+	 * An internal exception used to detect write methods.
+	 * @author Kristian
+	 */
+	private static class WriteMethodException extends RuntimeException {
+		private static final long serialVersionUID = 1L;
+		
+		public WriteMethodException() {
+			super("A write method was executed.");
+		}	
+	}
 }

ProtocolLib/src/main/java/com/comphenix/protocol/utility/MinecraftReflection.java

@@ -35,6 +35,7 @@ import java.util.regex.Pattern;
 
 import javax.annotation.Nonnull;
 
+import net.minecraft.util.io.netty.buffer.ByteBuf;
 import net.sf.cglib.asm.ClassReader;
 import net.sf.cglib.asm.MethodVisitor;
 import net.sf.cglib.asm.Opcodes;
@@ -43,7 +44,7 @@ import org.bukkit.Bukkit;
 import org.bukkit.Server;
 import org.bukkit.inventory.ItemStack;
 
-import com.comphenix.protocol.Packets;
+import com.comphenix.protocol.PacketType;
 import com.comphenix.protocol.ProtocolLibrary;
 import com.comphenix.protocol.error.ErrorReporter;
 import com.comphenix.protocol.error.Report;
@@ -118,7 +119,8 @@ public class MinecraftReflection {
 	
 	// New in 1.4.5
 	private static Method craftNMSMethod;
-	private static Method craftBukkitMethod;
+	private static Method craftBukkitNMS;
+	private static Method craftBukkitOBC;
 	private static boolean craftItemStackFailed;
 
 	// The NMS version
@@ -135,6 +137,9 @@ public class MinecraftReflection {
 	 */
 	private static boolean initializing;
 	
+	// Whether or not we are using netty
+	private static Boolean cachedNetty;
+	
 	private MinecraftReflection() {
 		// No need to make this constructable.
 	}
@@ -602,6 +607,23 @@ public class MinecraftReflection {
 		}
 	}
 	
+	/**
+	 * Determine if this Minecraft version is using Netty.
+	 * <p>
+	 * Spigot is ignored in this consideration.
+	 * @return TRUE if it does, FALSE otherwise.
+	 */
+	public static boolean isUsingNetty() {
+		if (cachedNetty == null) {
+			try {	
+				cachedNetty = getEnumProtocolClass() != null;
+			} catch (RuntimeException e) {
+				cachedNetty = false;
+			}
+		}
+		return cachedNetty;
+	}
+	
 	/**
 	 * Retrieve the least derived class, except Object.
 	 * @return Least derived super class.
@@ -1045,7 +1067,7 @@ public class MinecraftReflection {
 		try {
 			return getMinecraftClass("AttributeSnapshot");
 		} catch (RuntimeException e) {
-			final Class<?> packetUpdateAttributes = PacketRegistry.getPacketClassFromID(44, true);
+			final Class<?> packetUpdateAttributes = PacketRegistry.getPacketClassFromType(PacketType.Play.Server.UPDATE_ATTRIBUTES, true);
 			final String packetSignature = packetUpdateAttributes.getCanonicalName().replace('.', '/');
 			
 			// HACK - class is found by inspecting code
@@ -1147,7 +1169,7 @@ public class MinecraftReflection {
 			return getMinecraftClass("MobEffect");
 		} catch (RuntimeException e) {
 			// It is the second parameter in Packet41MobEffect
-			Class<?> packet = PacketRegistry.getPacketClassFromID(Packets.Server.MOB_EFFECT);
+			Class<?> packet = PacketRegistry.getPacketClassFromType(PacketType.Play.Server.MOB_EFFECT);
 			Constructor<?> constructor = FuzzyReflection.fromClass(packet).getConstructor(
 				FuzzyMethodContract.newBuilder().
 				parameterCount(2).
@@ -1159,6 +1181,41 @@ public class MinecraftReflection {
 		}
 	}
 	
+	/**
+	 * Retrieve the packet data serializer class that overrides ByteBuf.
+	 * @return The data serializer class.
+	 */
+	public static Class<?> getPacketDataSerializerClass() {
+		try {
+			return getMinecraftClass("PacketDataSerializer");
+		} catch (RuntimeException e) {
+			Class<?> packet = getPacketClass();
+			Method method = FuzzyReflection.fromClass(packet).getMethod(
+					FuzzyMethodContract.newBuilder().
+					parameterCount(1).
+					parameterDerivedOf(ByteBuf.class).
+					returnTypeVoid().
+					build()
+				);
+			return setMinecraftClass("PacketDataSerializer", method.getParameterTypes()[0]);
+		}
+	}
+	
+	/**
+	 * Retrieve an instance of the packet data serializer wrapper.
+	 * @param buffer - the buffer.
+	 * @return The instance.
+	 */
+	public static ByteBuf getPacketDataSerializer(ByteBuf buffer) {
+		Class<?> packetSerializer = getPacketDataSerializerClass();
+		
+		try {
+			return (ByteBuf) packetSerializer.getConstructor(ByteBuf.class).newInstance(buffer);
+		} catch (Exception e) {
+			throw new RuntimeException("Cannot construct packet serializer.", e);
+		}
+	}
+	
 	/**
 	 * Determine if a given method retrieved by ASM is a constructor.
 	 * @param name - the name of the method.
@@ -1219,7 +1276,7 @@ public class MinecraftReflection {
 	 */
 	public static ItemStack getBukkitItemStack(ItemStack bukkitItemStack) {
 		// Delegate this task to the method that can execute it
-		if (craftBukkitMethod != null)
+		if (craftBukkitNMS != null)
 			return getBukkitItemByMethod(bukkitItemStack);
 		
 		if (craftBukkitConstructor == null) {
@@ -1243,9 +1300,10 @@ public class MinecraftReflection {
 	}
 
 	private static ItemStack getBukkitItemByMethod(ItemStack bukkitItemStack) {
-		if (craftBukkitMethod == null) {
+		if (craftBukkitNMS == null) {
 			try {
-				craftBukkitMethod = getCraftItemStackClass().getMethod("asCraftCopy", ItemStack.class);
+				craftBukkitNMS = getCraftItemStackClass().getMethod("asNMSCopy", ItemStack.class);
+				craftBukkitOBC = getCraftItemStackClass().getMethod("asCraftMirror", MinecraftReflection.getItemStackClass());
 			} catch (Exception e) {
 				craftItemStackFailed = true;
 				throw new RuntimeException("Cannot find CraftItemStack.asCraftCopy(org.bukkit.inventory.ItemStack).", e);
@@ -1254,7 +1312,8 @@ public class MinecraftReflection {
 		
 		// Next, construct it
 		try {
-			return (ItemStack) craftBukkitMethod.invoke(null, bukkitItemStack);
+			Object nmsItemStack = craftBukkitNMS.invoke(null, bukkitItemStack);
+			return (ItemStack) craftBukkitOBC.invoke(null, nmsItemStack);
 		} catch (Exception e) {
 			throw new RuntimeException("Cannot construct CraftItemStack.", e);
 		}

ProtocolLib/src/main/java/com/comphenix/protocol/utility/MinecraftVersion.java

@@ -17,6 +17,7 @@
 
 package com.comphenix.protocol.utility;
 
+import java.io.Serializable;
 import java.text.SimpleDateFormat;
 import java.util.Locale;
 import java.util.regex.Matcher;
@@ -34,7 +35,9 @@ import com.google.common.collect.Ordering;
  * 
  * @author Kristian
  */
-public class MinecraftVersion implements Comparable<MinecraftVersion> {
+public class MinecraftVersion implements Comparable<MinecraftVersion>, Serializable {
+	private static final long serialVersionUID = 1L;
+
 	/**
 	 * Regular expression used to parse version strings.
 	 */

ProtocolLib/src/main/java/com/comphenix/protocol/utility/SnapshotVersion.java

@@ -1,7 +1,9 @@
 package com.comphenix.protocol.utility;
 
+import java.io.Serializable;
 import java.text.ParseException;
 import java.text.SimpleDateFormat;
+import java.util.Calendar;
 import java.util.Date;
 import java.util.Locale;
 import java.util.regex.Matcher;
@@ -14,13 +16,17 @@ import com.google.common.collect.ComparisonChain;
  * Used to parse a snapshot version.
  * @author Kristian
  */
-public class SnapshotVersion implements Comparable<SnapshotVersion> {
+public class SnapshotVersion implements Comparable<SnapshotVersion>, Serializable {
+	// Increment when the class changes
+	private static final long serialVersionUID = 1L;
+
 	private static final Pattern SNAPSHOT_PATTERN = Pattern.compile("(\\d{2}w\\d{2})([a-z])");
 
-	private final String rawString;
 	private final Date snapshotDate;
 	private final int snapshotWeekVersion;
 
+	private transient String rawString;
+	
 	public SnapshotVersion(String version) {
 		Matcher matcher = SNAPSHOT_PATTERN.matcher(version.trim());
 		
@@ -70,6 +76,15 @@ public class SnapshotVersion implements Comparable<SnapshotVersion> {
 	 * @return The snapshot string.
 	 */
 	public String getSnapshotString() {
+		if (rawString == null) {
+			// It's essential that we use the same locale
+			Calendar current = Calendar.getInstance(Locale.US);
+			current.setTime(snapshotDate);
+			rawString = String.format("%02dw%02d%s",
+				current.get(Calendar.YEAR) % 100, 
+				current.get(Calendar.WEEK_OF_YEAR),
+				(char) ((int)'a' + snapshotWeekVersion));
+		}
 		return rawString;
 	}
 
@@ -103,6 +118,6 @@ public class SnapshotVersion implements Comparable<SnapshotVersion> {
 	
 	@Override
 	public String toString() {
-		return rawString;
+		return getSnapshotString();
 	}
 }

ProtocolLib/src/main/java/com/comphenix/protocol/wrappers/ChunkPosition.java

@@ -163,7 +163,8 @@ public class ChunkPosition {
 				
 				// Construct the underlying ChunkPosition
 				try {
-					return chunkPositionConstructor.newInstance(specific.x, specific.y, specific.z);
+					Object result = chunkPositionConstructor.newInstance(specific.x, specific.y, specific.z);
+					return result;
 				} catch (Exception e) {
 					throw new RuntimeException("Cannot construct ChunkPosition.", e);
 				}
@@ -183,7 +184,8 @@ public class ChunkPosition {
 					if (intModifier.size() >= 3) {
 						try {
 							StructureModifier<Integer> instance = intModifier.withTarget(generic);
-							return new ChunkPosition(instance.read(0), instance.read(1), instance.read(2));
+							ChunkPosition result = new ChunkPosition(instance.read(0), instance.read(1), instance.read(2));
+							return result;
 						} catch (FieldAccessException e) {
 							// This is an exeptional work-around, so we don't want to burden the caller with the messy details
 							throw new RuntimeException("Field access error.", e);
@@ -224,6 +226,6 @@ public class ChunkPosition {
 
 	@Override
 	public String toString() {
-		return "ChunkPosition [x=" + x + ", y=" + y + ", z=" + z + "]";
+		return "WrappedChunkPosition [x=" + x + ", y=" + y + ", z=" + z + "]";
 	}
 }

ProtocolLib/src/main/java/com/comphenix/protocol/wrappers/WrappedDataWatcher.java

@@ -17,6 +17,7 @@
 
 package com.comphenix.protocol.wrappers;
 
+import java.lang.reflect.Constructor;
 import java.lang.reflect.Field;
 import java.lang.reflect.InvocationTargetException;
 import java.lang.reflect.Method;
@@ -52,7 +53,6 @@ import com.google.common.collect.Iterators;
  * @author Kristian
  */
 public class WrappedDataWatcher implements Iterable<WrappedWatchableObject> {
-
 	/**
 	 * Used to assign integer IDs to given types.
 	 */
@@ -61,12 +61,16 @@ public class WrappedDataWatcher implements Iterable<WrappedWatchableObject> {
 	// Fields
 	private static Field valueMapField;
 	private static Field readWriteLockField;
+	private static Field entityField;
 	
 	// Methods
 	private static Method createKeyValueMethod;
 	private static Method updateKeyValueMethod;
 	private static Method getKeyValueMethod;
 	
+	// Constructors
+	private static Constructor<?> createDataWatcherConstructor;
+	
 	// Entity methods
 	private volatile static Field entityDataField;
 	
@@ -94,7 +98,11 @@ public class WrappedDataWatcher implements Iterable<WrappedWatchableObject> {
 	public WrappedDataWatcher() {
 		// Just create a new watcher
 		try {
+			if (MinecraftReflection.isUsingNetty()) {
+				this.handle = newEntityHandle(null);
+			} else {
 				this.handle = MinecraftReflection.getDataWatcherClass().newInstance();
+			}
 			initialize();
 			
 		} catch (Exception e) {
@@ -117,6 +125,42 @@ public class WrappedDataWatcher implements Iterable<WrappedWatchableObject> {
 		initialize();
 	}
 	
+	/**
+	 * Construct a new data watcher with the given entity.
+	 * <p>
+	 * In 1.6.4 and ealier, this will fall back to using {@link #WrappedDataWatcher()}.
+	 * @param entity - the entity.
+	 * @return The wrapped data watcher.
+	 */
+	public static WrappedDataWatcher newWithEntity(Entity entity) {
+		// Use the old constructor
+		if (!MinecraftReflection.isUsingNetty())
+			return new WrappedDataWatcher();
+		return new WrappedDataWatcher(newEntityHandle(entity));
+	}
+	
+	/**
+	 * Construct a new native DataWatcher with the given entity.
+	 * <p>
+	 * Warning: This is only supported in 1.7.2 and above.
+	 * @param entity - the entity, or NULL.
+	 * @return The data watcher.
+	 */
+	private static Object newEntityHandle(Entity entity) {
+		Class<?> dataWatcher = MinecraftReflection.getDataWatcherClass();
+		
+		try {
+			if (createDataWatcherConstructor == null)
+				createDataWatcherConstructor = dataWatcher.getConstructor(MinecraftReflection.getEntityClass());
+			
+			return createDataWatcherConstructor.newInstance(
+					BukkitUnwrapper.getInstance().unwrapItem(entity)
+			);
+		} catch (Exception e) {
+			throw new RuntimeException("Cannot construct data watcher.", e);
+		}
+	}
+	
 	/**
 	 * Create a new data watcher for a list of watchable objects.
 	 * <p>
@@ -548,6 +592,11 @@ public class WrappedDataWatcher implements Iterable<WrappedWatchableObject> {
 			// It's not a big deal
 		}
 		
+		// Check for the entity field as well
+		if (MinecraftReflection.isUsingNetty()) {
+			entityField = fuzzy.getFieldByType("entity", MinecraftReflection.getEntityClass());
+			entityField.setAccessible(true);
+		}
 		initializeMethods(fuzzy);
 	}
 	
@@ -648,4 +697,38 @@ public class WrappedDataWatcher implements Iterable<WrappedWatchableObject> {
 	public String toString() {
 		return asMap().toString();
 	}
+	
+	/**
+	 * Retrieve the entity associated with this data watcher.
+	 * <p>
+	 * <b>Warning:</b> This is only supported on 1.7.2 and above.
+	 * @return The entity, or NULL.
+	 */
+	public Entity getEntity() {
+		if (!MinecraftReflection.isUsingNetty())
+			throw new IllegalStateException("This method is only supported on 1.7.2 and above.");
+		
+		try {
+			return (Entity) MinecraftReflection.getBukkitEntity(entityField.get(handle));
+		} catch (Exception e) {
+			throw new RuntimeException("Unable to retrieve entity.", e);
+		}
+	}
+	
+	/**
+	 * Set the entity associated with this data watcher.
+	 * <p>
+	 * <b>Warning:</b> This is only supported on 1.7.2 and above.
+	 * @param entity - the new entity.
+	 */
+	public void setEntity(Entity entity) {
+		if (!MinecraftReflection.isUsingNetty())
+			throw new IllegalStateException("This method is only supported on 1.7.2 and above.");
+		
+		try {
+			entityField.set(handle, BukkitUnwrapper.getInstance().unwrapItem(entity));
+		} catch (Exception e) {
+			throw new RuntimeException("Unable to set entity.", e);
+		}
+	}
 }

ProtocolLib/src/main/java/com/comphenix/protocol/wrappers/collection/ConvertedMap.java

@@ -22,6 +22,10 @@ import java.util.Iterator;
 import java.util.Map;
 import java.util.Set;
 
+import javax.annotation.Nullable;
+
+import com.google.common.base.Function;
+import com.google.common.collect.Collections2;
 
 /**
  * Represents a map that wraps another map by transforming the entries going in and out.
@@ -95,12 +99,13 @@ public abstract class ConvertedMap<Key, VInner, VOuter> extends AbstractConverte
 
 					@Override
 					public VOuter getValue() {
-						return ConvertedMap.this.toOuter(inner.getValue());
+						return ConvertedMap.this.toOuter(inner.getKey(), inner.getValue());
 					}
 
 					@Override
 					public VOuter setValue(VOuter value) {
-						return ConvertedMap.this.toOuter(inner.setValue(ConvertedMap.this.toInner(value))); 
+						final VInner converted = ConvertedMap.this.toInner(getKey(), value);
+						return ConvertedMap.this.toOuter(getKey(), inner.setValue(converted)); 
 					}
 					
 					@Override
@@ -112,9 +117,28 @@ public abstract class ConvertedMap<Key, VInner, VOuter> extends AbstractConverte
 		};
 	}
 
+	/**
+	 * Convert a value from the inner map to the outer visible map.
+	 * @param inner - the inner value.
+	 * @return The outer value.
+	 */
+	protected VOuter toOuter(Key key, VInner inner) {
+		return toOuter(inner);
+	}
+	
+	/**
+	 * Convert a value from the outer map to the internal inner map.
+	 * @param outer - the outer value.
+	 * @return The inner value.
+	 */
+	protected VInner toInner(Key key, VOuter outer) {
+		return toInner(outer);
+	}
+	
+	@SuppressWarnings("unchecked")
 	@Override
 	public VOuter get(Object key) {
-		return toOuter(inner.get(key));
+		return toOuter((Key) key, inner.get(key));
 	}
 
 	@Override
@@ -129,7 +153,7 @@ public abstract class ConvertedMap<Key, VInner, VOuter> extends AbstractConverte
 
 	@Override
 	public VOuter put(Key key, VOuter value) {
-		return toOuter(inner.put(key, toInner(value)));
+		return toOuter(key, inner.put(key, toInner(key, value)));
 	}
 
 	@Override
@@ -139,9 +163,10 @@ public abstract class ConvertedMap<Key, VInner, VOuter> extends AbstractConverte
 		}
 	}
 
+	@SuppressWarnings("unchecked")
 	@Override
 	public VOuter remove(Object key) {
-		return toOuter(inner.remove(key));
+		return toOuter((Key) key, inner.remove(key));
 	}
 
 	@Override
@@ -151,17 +176,12 @@ public abstract class ConvertedMap<Key, VInner, VOuter> extends AbstractConverte
 
 	@Override
 	public Collection<VOuter> values() {
-		return new ConvertedCollection<VInner, VOuter>(inner.values()) {
+		return Collections2.transform(entrySet(), new Function<Entry<Key, VOuter>, VOuter>() {
 			@Override
-			protected VOuter toOuter(VInner inner) {
-				return ConvertedMap.this.toOuter(inner);
+			public VOuter apply(@Nullable java.util.Map.Entry<Key, VOuter> entry) {
+				return entry.getValue();
 			}
-
-			@Override
-			protected VInner toInner(VOuter outer) {
-				return ConvertedMap.this.toInner(outer);
-			}
-		};
+		});
 	}
 
     /**

ProtocolLib/src/main/java/com/comphenix/protocol/wrappers/nbt/NameProperty.java

@@ -0,0 +1,94 @@
+package com.comphenix.protocol.wrappers.nbt;
+
+import java.util.Map;
+
+import net.minecraft.util.com.google.common.collect.Maps;
+
+import com.comphenix.protocol.reflect.StructureModifier;
+
+public abstract class NameProperty {
+	private static final Map<Class<?>, StructureModifier<String>> MODIFIERS = Maps.newConcurrentMap();
+	
+	/**
+	 * Retrieve the name.
+	 * @return The name.
+	 */
+	public abstract String getName();
+	
+	/**
+	 * Set the name.
+	 * @param name - the new value of the name.
+	 */
+	public abstract void setName(String name);
+	
+	/**
+	 * Retrieve the string modifier for a particular class.
+	 * @param baseClass - the base class.
+	 * @return The string modifier, with no target.
+	 */
+	private static StructureModifier<String> getModifier(Class<?> baseClass) {
+		StructureModifier<String> modifier = MODIFIERS.get(baseClass);
+		
+		// Share modifier
+		if (modifier == null) {
+			modifier = new StructureModifier<Object>(baseClass, Object.class, false).withType(String.class);
+			MODIFIERS.put(baseClass, modifier);
+		}
+		return modifier;
+	}
+	
+	/**
+	 * Determine if a string of the given index exists in the base class.
+	 * @param baseClass - the base class.
+	 * @param index - the index to check.
+	 * @return TRUE if it does, FALSE otherwise.
+	 */
+	public static boolean hasStringIndex(Class<?> baseClass, int index) {
+		if (index < 0)
+			return false;
+		return index < getModifier(baseClass).size();
+	}
+	
+	/**
+	 * Retrieve a name property that delegates all read and write operations to a field of the given target.
+	 * @param baseClass - the base class.
+	 * @param target - the target 
+	 * @param index - the index of the field.
+	 * @return The name property.
+	 */
+	public static NameProperty fromStringIndex(Class<?> baseClass, Object target, final int index) {
+		final StructureModifier<String> modifier = getModifier(baseClass).withTarget(target);
+		
+		return new NameProperty() {
+			@Override
+			public String getName() {
+				return modifier.read(index);
+			}
+			
+			@Override
+			public void setName(String name) {
+				modifier.write(index, name);
+			}
+		};
+	}
+	
+	/**
+	 * Retrieve a new name property around a simple field, forming a Java bean.
+	 * @return The name property.
+	 */
+	public static NameProperty fromBean() {
+		return new NameProperty() {
+			private String name;
+			
+			@Override
+			public void setName(String name) {
+				this.name = name;
+			}
+			
+			@Override
+			public String getName() {
+				return name;
+			}
+		};
+	}
+}

ProtocolLib/src/main/java/com/comphenix/protocol/wrappers/nbt/NbtFactory.java

@@ -41,6 +41,7 @@ import com.comphenix.protocol.wrappers.BukkitConverters;
 public class NbtFactory {
 	// Used to create the underlying tag
 	private static Method methodCreateTag;
+	private static boolean methodCreateWithName;
 		
 	// Item stack trickery
 	private static StructureModifier<Object> itemStackModifier;
@@ -188,10 +189,13 @@ public class NbtFactory {
 	
 	/**
 	 * Initialize a NBT wrapper.
+	 * <p>
+	 * Use {@link #fromNMS(Object, String)} instead.
 	 * @param handle - the underlying net.minecraft.server object to wrap.
 	 * @return A NBT wrapper.
 	 */
 	@SuppressWarnings({"unchecked", "rawtypes"})
+	@Deprecated
 	public static <T> NbtWrapper<T> fromNMS(Object handle) {
 		WrappedElement<T> partial = new WrappedElement<T>(handle);
 		
@@ -204,6 +208,25 @@ public class NbtFactory {
 			return partial;
 	}
 	
+	/**
+	 * Initialize a NBT wrapper with a name.
+	 * @param name - the name of the tag, or NULL if not valid.
+	 * @param handle - the underlying net.minecraft.server object to wrap.
+	 * @return A NBT wrapper.
+	 */
+	@SuppressWarnings({"unchecked", "rawtypes"})
+	public static <T> NbtWrapper<T> fromNMS(Object handle, String name) {
+		WrappedElement<T> partial = new WrappedElement<T>(handle, name);
+		
+		// See if this is actually a compound tag
+		if (partial.getType() == NbtType.TAG_COMPOUND)
+			return (NbtWrapper<T>) new WrappedCompound(handle, name);
+		else if (partial.getType() == NbtType.TAG_LIST)
+			return new WrappedList(handle, name);
+		else
+			return partial;
+	}
+		
 	/**
 	 * Retrieve the NBT compound from a given NMS handle.
 	 * @param handle - the underlying net.minecraft.server object to wrap.
@@ -351,7 +374,6 @@ public class NbtFactory {
 	 * @return The new wrapped NBT tag.
 	 * @throws FieldAccessException If we're unable to create the underlying tag.
 	 */
-	@SuppressWarnings({"unchecked", "rawtypes"})
 	public static <T> NbtWrapper<T> ofWrapper(NbtType type, String name) {
 		if (type == null)
 			throw new IllegalArgumentException("type cannot be NULL.");
@@ -362,11 +384,45 @@ public class NbtFactory {
 			Class<?> base = MinecraftReflection.getNBTBaseClass();
 			
 			// Use the base class
-			methodCreateTag = FuzzyReflection.fromClass(base).
-				getMethodByParameters("createTag", base, new Class<?>[] { byte.class, String.class });
+			try {
+				methodCreateTag = findCreateMethod(base, byte.class, String.class);
+				methodCreateWithName = true;
+				
+			} catch (Exception e) {
+				methodCreateTag = findCreateMethod(base, byte.class);
+				methodCreateWithName = false;
+			}
 		}
 		
 		try {
+			// Delegate to the correct version
+			if (methodCreateWithName)
+				return createTagWithName(type, name);
+			else
+				return createTagSetName(type, name);
+			
+		} catch (Exception e) {
+			// Inform the caller
+			throw new FieldAccessException(
+					String.format("Cannot create NBT element %s (type: %s)", name, type),
+					e);
+		}
+	}
+
+	/**
+	 * Find the create method of NBTBase.
+	 * @param base - the base NBT.
+	 * @param params - the parameters.
+	 */
+	private static Method findCreateMethod(Class<?> base, Class<?>... params) {
+		Method method = FuzzyReflection.fromClass(base, true).getMethodByParameters("createTag", base, params);
+		method.setAccessible(true);
+		return method;
+	}
+
+	// For Minecraft 1.6.4 and below
+	@SuppressWarnings({"unchecked", "rawtypes"})
+	private static <T> NbtWrapper<T> createTagWithName(NbtType type, String name) throws Exception {
 		Object handle = methodCreateTag.invoke(null, (byte) type.getRawID(), name);
 		
 		if (type == NbtType.TAG_COMPOUND)
@@ -375,13 +431,19 @@ public class NbtFactory {
 			return (NbtWrapper<T>) new WrappedList(handle);
 		else
 			return new WrappedElement<T>(handle);
-			
-		} catch (Exception e) {
-			// Inform the caller
-			throw new FieldAccessException(
-					String.format("Cannot create NBT element %s (type: %s)", name, type),
-					e);
 	}
+	
+	// For Minecraft 1.7.2 and above
+	@SuppressWarnings({"unchecked", "rawtypes"})
+	private static <T> NbtWrapper<T> createTagSetName(NbtType type, String name) throws Exception {
+		Object handle = methodCreateTag.invoke(null, (byte) type.getRawID());
+		
+		if (type == NbtType.TAG_COMPOUND)
+			return (NbtWrapper<T>) new WrappedCompound(handle, name);
+		else if (type == NbtType.TAG_LIST)
+			return (NbtWrapper<T>) new WrappedList(handle, name);
+		else
+			return new WrappedElement<T>(handle, name);
 	}
 	
 	/**

ProtocolLib/src/main/java/com/comphenix/protocol/wrappers/nbt/WrappedCompound.java

@@ -70,6 +70,15 @@ class WrappedCompound implements NbtWrapper<Map<String, NbtBase<?>>>, Iterable<N
 		this.container = new WrappedElement<Map<String,Object>>(handle);
 	}
 
+	/**
+	 * Construct a wrapped compound from a given NMS handle.
+	 * @param handle - the NMS handle.
+	 * @param name - the name of the current compound.
+	 */
+	public WrappedCompound(Object handle, String name) {
+		this.container = new WrappedElement<Map<String,Object>>(handle, name);
+	}
+	
 	@Override
 	public boolean accept(NbtVisitor visitor) {
 		// Enter this node?
@@ -133,12 +142,20 @@ class WrappedCompound implements NbtWrapper<Map<String, NbtBase<?>>>, Iterable<N
 					return NbtFactory.fromBase(outer).getHandle();
 				}
 				
+				@SuppressWarnings("deprecation")
 				protected NbtBase<?> toOuter(Object inner) {
 					if (inner == null)
 						return null;
 					return NbtFactory.fromNMS(inner);
 				};
 				
+				@Override
+				protected NbtBase<?> toOuter(String key, Object inner) {
+					if (inner == null)
+						return null;
+					return NbtFactory.fromNMS(inner, key);
+				}
+				
 				@Override
 				public String toString() {
 					return WrappedCompound.this.toString();

ProtocolLib/src/main/java/com/comphenix/protocol/wrappers/nbt/WrappedElement.java

@@ -34,15 +34,14 @@ import com.google.common.base.Objects;
  * @param <TType> - type of the value field.
  */
 class WrappedElement<TType> implements NbtWrapper<TType> {	
-	// Structure modifier for the base class 
-	private static volatile StructureModifier<Object> baseModifier;
-	
 	// For retrieving the current type ID
 	private static volatile Method methodGetTypeID;
-	
 	// For handling cloning
 	private static volatile Method methodClone;
 	
+	// Which name property to use
+	private static volatile Boolean hasNbtName;
+	
 	// Structure modifiers for the different NBT elements
 	private static StructureModifier<?>[] modifiers = new StructureModifier<?>[NbtType.values().length];
 	
@@ -52,27 +51,43 @@ class WrappedElement<TType> implements NbtWrapper<TType> {
 	// Saved type
 	private NbtType type;
 	
+	// Saved name
+	private NameProperty nameProperty;
+	
 	/**
 	 * Initialize a NBT wrapper for a generic element.
 	 * @param handle - the NBT element to wrap.
 	 */
 	public WrappedElement(Object handle) {
 		this.handle = handle;
+		initializeProperty();
 	}
 		
 	/**
-	 * Retrieve the modifier (with no target) that is used to read and write the NBT name.
-	 * @return A modifier for accessing the NBT name.
+	 * Initialize a NBT wrapper for a generic element.
+	 * @param handle - the NBT element to wrap.
 	 */
-	protected static StructureModifier<String> getBaseModifier() {
-		if (baseModifier == null) {
-			Class<?> base = MinecraftReflection.getNBTBaseClass();
-
-			// This will be the same for all classes, so we'll share modifier
-			baseModifier = new StructureModifier<Object>(base, Object.class, false).withType(String.class);
+	public WrappedElement(Object handle, String name) {
+		this.handle = handle;
+		initializeProperty();
+		setName(name);
 	}
 	
-		return baseModifier.withType(String.class);
+	private void initializeProperty() {
+		if (nameProperty == null) {
+			Class<?> base = MinecraftReflection.getNBTBaseClass();
+			
+			// Determine if we have a NBT string field
+			if (hasNbtName == null) {
+				hasNbtName = NameProperty.hasStringIndex(base, 0);
+			}
+			
+			// Now initialize the name property
+			if (hasNbtName)
+				this.nameProperty = NameProperty.fromStringIndex(base, handle, 0);
+			else
+				this.nameProperty = NameProperty.fromBean();
+		}
 	}
 	
 	/**
@@ -159,12 +174,12 @@ class WrappedElement<TType> implements NbtWrapper<TType> {
 	
 	@Override
 	public String getName() {
-		return getBaseModifier().withTarget(handle).read(0);
+		return nameProperty.getName();
 	}
 	
 	@Override
 	public void setName(String name) {
-		getBaseModifier().withTarget(handle).write(0, name);
+		nameProperty.setName(name);
 	}
 	
 	@Override
@@ -194,7 +209,7 @@ class WrappedElement<TType> implements NbtWrapper<TType> {
 		}
 		
 		try {
-			return NbtFactory.fromNMS(methodClone.invoke(handle));
+			return NbtFactory.fromNMS(methodClone.invoke(handle), getName());
 		} catch (Exception e) {
 			throw new FieldAccessException("Unable to clone " + handle, e);
 		}

ProtocolLib/src/main/java/com/comphenix/protocol/wrappers/nbt/WrappedList.java

@@ -109,6 +109,16 @@ class WrappedList<TType> implements NbtWrapper<List<NbtBase<TType>>>, Iterable<T
 		this.elementType = container.getSubType();
 	}
 	
+	/**
+	 * Construct a list from an NMS instance.
+	 * @param handle - NMS instance.
+	 * @param name - name of the current list.
+	 */
+	public WrappedList(Object handle, String name) {
+		this.container = new WrappedElement<List<Object>>(handle, name);
+		this.elementType = container.getSubType();
+	}
+
 	@Override
 	public boolean accept(NbtVisitor visitor) {
 		// Enter this node?
@@ -209,7 +219,7 @@ class WrappedList<TType> implements NbtWrapper<List<NbtBase<TType>>>, Iterable<T
 				protected NbtBase<TType> toOuter(Object inner) {
 					if (inner == null)
 						return null;
-					return NbtFactory.fromNMS(inner);
+					return NbtFactory.fromNMS(inner, null);
 				}
 				
 				@Override

ProtocolLib/src/main/java/com/comphenix/protocol/wrappers/nbt/io/NbtBinarySerializer.java

@@ -59,7 +59,7 @@ public class NbtBinarySerializer {
 		}
 		
 		try {
-			return NbtFactory.fromNMS(methodLoad.invoke(null, source));
+			return NbtFactory.fromNMS(methodLoad.invoke(null, source), null);
 		} catch (Exception e) {
 			throw new FieldAccessException("Unable to read NBT from " + source, e);
 		}

ProtocolLib/src/test/java/com/comphenix/integration/protocol/SimpleCraftBukkitITCase.java

@@ -11,7 +11,6 @@ import java.util.Map;
 import java.util.concurrent.Callable;
 import java.util.concurrent.TimeUnit;
 
-import org.apache.commons.io.FileUtils;
 import org.bukkit.Bukkit;
 import org.bukkit.plugin.Plugin;
 import org.bukkit.plugin.PluginDescriptionFile;
@@ -26,6 +25,7 @@ import org.powermock.core.classloader.annotations.PrepareForTest;
 import com.comphenix.protocol.ProtocolLibrary;
 import com.comphenix.protocol.reflect.FieldUtils;
 import com.google.common.collect.Lists;
+import com.google.common.io.Files;
 
 // Damn final classes ...
 @RunWith(org.powermock.modules.junit4.PowerMockRunner.class)
@@ -91,13 +91,14 @@ public class SimpleCraftBukkitITCase {
 	 * Copy ProtocolLib into the plugins folder.
 	 * @throws IOException If anything went wrong.
 	 */
+	@SuppressWarnings("deprecation")
 	private static void setupPlugins() throws IOException {
 		File pluginDirectory = new File("plugins/");
 		File bestFile = null;
 		int bestLength = Integer.MAX_VALUE;
 		
 		// Copy the ProtocolLib plugin to the server
-		FileUtils.cleanDirectory(pluginDirectory);
+		Files.deleteDirectoryContents(pluginDirectory);
 		
 		for (File file : new File("../").listFiles()) {
 			String name = file.getName();
@@ -107,7 +108,7 @@ public class SimpleCraftBukkitITCase {
 				bestFile = file;
 			}
 		}
-		FileUtils.copyFile(bestFile, new File(pluginDirectory, bestFile.getName()));
+		Files.copy(bestFile, new File(pluginDirectory, bestFile.getName()));
 	}
 	
 	/**

ProtocolLib/src/test/java/com/comphenix/protocol/BukkitInitialization.java

@@ -4,10 +4,13 @@ import static org.mockito.Matchers.any;
 import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.when;
 
-import net.minecraft.server.v1_6_R3.StatisticList;
+import net.minecraft.server.v1_7_R1.Block;
+import net.minecraft.server.v1_7_R1.Item;
+import net.minecraft.server.v1_7_R1.RegistryMaterials;
+import net.minecraft.server.v1_7_R1.StatisticList;
 
 // Will have to be updated for every version though
-import org.bukkit.craftbukkit.v1_6_R3.inventory.CraftItemFactory;
+import org.bukkit.craftbukkit.v1_7_R1.inventory.CraftItemFactory;
 
 import org.bukkit.Bukkit;
 import org.bukkit.Material;
@@ -37,9 +40,12 @@ public class BukkitInitialization {
 			initializePackage();
 			
 			try {
-				StatisticList.b();
+				Block.p();
+				Item.l();
+				StatisticList.a();
 			} catch (Exception e) {
 				// Swallow
+				e.printStackTrace();
 			}
 			
 			// Mock the server object
@@ -48,6 +54,7 @@ public class BukkitInitialization {
 			ItemMeta mockedMeta = mock(ItemMeta.class);
 	
 			when(mockedServer.getItemFactory()).thenReturn(mockedFactory);
+			when(mockedServer.isPrimaryThread()).thenReturn(true);
 			when(mockedFactory.getItemMeta(any(Material.class))).thenReturn(mockedMeta);
 	
 			// Inject this fake server
@@ -63,6 +70,6 @@ public class BukkitInitialization {
 	 */
 	public static void initializePackage() {
 		// Initialize reflection
-		MinecraftReflection.setMinecraftPackage("net.minecraft.server.v1_6_R3", "org.bukkit.craftbukkit.v1_6_R3");
+		MinecraftReflection.setMinecraftPackage("net.minecraft.server.v1_7_R1", "org.bukkit.craftbukkit.v1_7_R1");
 	}
 }

ProtocolLib/src/test/java/com/comphenix/protocol/events/PacketContainerTest.java

@@ -22,15 +22,15 @@ import java.lang.reflect.Array;
 import java.util.List;
 import java.util.UUID;
 
-import net.minecraft.server.v1_6_R3.AttributeModifier;
-import net.minecraft.server.v1_6_R3.AttributeSnapshot;
-import net.minecraft.server.v1_6_R3.Packet44UpdateAttributes;
+import net.minecraft.server.v1_7_R1.AttributeModifier;
+import net.minecraft.server.v1_7_R1.AttributeSnapshot;
+import net.minecraft.server.v1_7_R1.PacketPlayOutUpdateAttributes;
 
 import org.apache.commons.lang.SerializationUtils;
 import org.apache.commons.lang.builder.ToStringBuilder;
 import org.apache.commons.lang.builder.ToStringStyle;
 // Will have to be updated for every version though
-import org.bukkit.craftbukkit.v1_6_R3.inventory.CraftItemFactory;
+import org.bukkit.craftbukkit.v1_7_R1.inventory.CraftItemFactory;
 
 import org.bukkit.Material;
 import org.bukkit.WorldType;
@@ -43,6 +43,7 @@ import org.junit.runner.RunWith;
 import org.powermock.core.classloader.annotations.PrepareForTest;
 
 import com.comphenix.protocol.BukkitInitialization;
+import com.comphenix.protocol.PacketType;
 import com.comphenix.protocol.Packets;
 import com.comphenix.protocol.injector.PacketConstructor;
 import com.comphenix.protocol.reflect.EquivalentConverter;
@@ -120,7 +121,7 @@ public class PacketContainerTest {
 	
 	@Test
 	public void testGetShorts() {
-		PacketContainer itemData = new PacketContainer(Packets.Server.ITEM_DATA);
+		PacketContainer itemData = new PacketContainer(Packets.Server.TRANSACTION);
 		testPrimitive(itemData.getShorts(), 0, (short)0, (short)1);
 	}
 
@@ -150,7 +151,7 @@ public class PacketContainerTest {
 
 	@Test
 	public void testGetStrings() {
-		PacketContainer explosion = new PacketContainer(Packets.Server.CHAT);
+		PacketContainer explosion = new PacketContainer(PacketType.Play.Client.CHAT);
 		testPrimitive(explosion.getStrings(), 0, null, "hello");
 	}
 
@@ -183,11 +184,12 @@ public class PacketContainerTest {
 		StructureModifier<ItemStack> items = windowClick.getItemModifier();
 		ItemStack goldAxe = new ItemStack(Material.GOLD_AXE);
 		
+		assertNotNull(goldAxe.getType());
 		assertNull(items.read(0));
 		
 		// Insert the goldaxe and check if it's there
 		items.write(0, goldAxe);
-		assertTrue(equivalentItem(goldAxe, items.read(0)));
+		assertTrue("Item " + goldAxe + " != " + items.read(0), equivalentItem(goldAxe, items.read(0)));
 	}
  
 	@Test
@@ -295,7 +297,9 @@ public class PacketContainerTest {
 	
 		// Insert and read back
 		positionAccessor.write(0, positions);
-		assertEquals(positions, positionAccessor.read(0));
+		List<ChunkPosition> cloned = positionAccessor.read(0);
+		
+		assertEquals(positions, cloned);
 	}
 
 	@Test
@@ -319,7 +323,7 @@ public class PacketContainerTest {
 	
 	@Test
 	public void testSerialization() {
-		PacketContainer chat = new PacketContainer(3);
+		PacketContainer chat = new PacketContainer(PacketType.Play.Client.CHAT);
 		chat.getStrings().write(0, "Test");
 		
 		PacketContainer copy = (PacketContainer) SerializationUtils.clone(chat);
@@ -337,7 +341,7 @@ public class PacketContainerTest {
 		List<AttributeModifier> modifiers = Lists.newArrayList(
 			new AttributeModifier(UUID.randomUUID(), "Unknown synced attribute modifier", 10, 0));
 		AttributeSnapshot snapshot = new AttributeSnapshot(
-				(Packet44UpdateAttributes) attribute.getHandle(), "generic.Maxhealth", 20.0, modifiers);
+				(PacketPlayOutUpdateAttributes) attribute.getHandle(), "generic.Maxhealth", 20.0, modifiers);
 		
 		attribute.getSpecificModifier(List.class).write(0, Lists.newArrayList(snapshot));
 		PacketContainer cloned = attribute.deepClone();
@@ -367,25 +371,17 @@ public class PacketContainerTest {
 	@Test
 	public void testDeepClone() {
 		// Try constructing all the packets
-		for (Integer id : Iterables.concat(
-				Packets.getClientRegistry().values(), 
-				Packets.getServerRegistry().values() )) {
-
+		for (PacketType type : PacketType.values()) {
 			// Whether or not this packet has been registered
-			boolean registered = Packets.Server.isSupported(id) || 
-								 Packets.Client.isSupported(id);
+			boolean registered = type.isSupported();
 			
 			try {
-				PacketContainer constructed = new PacketContainer(id);
+				PacketContainer constructed = new PacketContainer(type);
 			
 				if (!registered) {
-					fail("Expected IllegalArgumentException(Packet " + id + " not registered");
+					fail("Expected IllegalArgumentException(Packet " + type + " not registered");
 				}
 					
-				// Make sure these packets contains fields as well
-				assertTrue("Constructed packet with no known fields (" + id + ")", 
-						constructed.getModifier().size() > 0);
-				
 				// Initialize default values
 				constructed.getModifier().writeDefaults();
 				
@@ -396,6 +392,10 @@ public class PacketContainerTest {
 				StructureModifier<Object> firstMod = constructed.getModifier(), secondMod = cloned.getModifier();
 				assertEquals(firstMod.size(), secondMod.size());
 
+				if (PacketType.Status.Server.KICK_DISCONNECT.equals(type)) {
+					assertArrayEquals(SerializationUtils.serialize(constructed), SerializationUtils.serialize(cloned));
+
+				} else {
 					// Make sure all the fields are equivalent
 					for (int i = 0; i < firstMod.size(); i++) {
 						if (firstMod.getField(i).getType().isArray())
@@ -403,11 +403,12 @@ public class PacketContainerTest {
 						else
 							testEquality(firstMod.read(i), secondMod.read(i));
 					}
+				}
 				
 			} catch (IllegalArgumentException e) {
 				if (!registered) {
 					// Check the same
-					assertEquals(e.getMessage(), "The packet ID " + id + " is not registered.");
+					assertEquals(e.getMessage(), "The packet ID " + type + " is not registered.");
 				} else {
 					// Something is very wrong
 					throw e;

ProtocolLib/src/test/java/com/comphenix/protocol/utility/StreamSerializerTest.java

@@ -8,10 +8,10 @@ import java.io.DataInputStream;
 import java.io.DataOutputStream;
 import java.io.IOException;
 
-import net.minecraft.server.v1_6_R3.IntHashMap;
+import net.minecraft.server.v1_7_R1.IntHashMap;
 
 import org.bukkit.Material;
-import org.bukkit.craftbukkit.v1_6_R3.inventory.CraftItemFactory;
+import org.bukkit.craftbukkit.v1_7_R1.inventory.CraftItemFactory;
 import org.bukkit.inventory.ItemStack;
 import org.junit.BeforeClass;
 import org.junit.Test;

ProtocolLib/src/test/java/com/comphenix/protocol/wrappers/WrappedAttributeTest.java

@@ -4,9 +4,9 @@ import static org.junit.Assert.*;
 
 import java.util.List;
 
-import net.minecraft.server.v1_6_R3.AttributeModifier;
-import net.minecraft.server.v1_6_R3.AttributeSnapshot;
-import net.minecraft.server.v1_6_R3.Packet44UpdateAttributes;
+import net.minecraft.server.v1_7_R1.AttributeModifier;
+import net.minecraft.server.v1_7_R1.AttributeSnapshot;
+import net.minecraft.server.v1_7_R1.PacketPlayOutUpdateAttributes;
 
 import org.junit.Before;
 import org.junit.BeforeClass;
@@ -83,7 +83,7 @@ public class WrappedAttributeTest {
 			modifiers.add((AttributeModifier) wrapper.getHandle());
 		}
 		return new AttributeSnapshot(
-			(Packet44UpdateAttributes) attribute.getParentPacket().getHandle(), 
+			(PacketPlayOutUpdateAttributes) attribute.getParentPacket().getHandle(), 
 			attribute.getAttributeKey(), attribute.getBaseValue(), modifiers);
 	}
 	

ProtocolLib/src/test/java/com/comphenix/protocol/wrappers/nbt/NbtFactoryTest.java

@@ -27,7 +27,7 @@ import java.io.DataOutput;
 import java.io.DataOutputStream;
 
 import org.bukkit.Material;
-import org.bukkit.craftbukkit.v1_6_R3.inventory.CraftItemFactory;
+import org.bukkit.craftbukkit.v1_7_R1.inventory.CraftItemFactory;
 import org.bukkit.inventory.ItemStack;
 import org.junit.BeforeClass;
 import org.junit.Test;