Fixed packet constructor and tons of other bugs.

ProtocolLib/src/com/comphenix/protocol/ProtocolManager.java

@@ -128,10 +128,10 @@ public interface ProtocolManager {
 	/**
 	 * Construct a packet using the special builtin Minecraft constructors.
 	 * @param id - the packet ID.
-	 * @param argumentTypes - type of each argument to pass to Minecraft.
+	 * @param argumentTypes - arguments that will be passed to the constructor.
 	 * @return The packet constructor.
 	 */
-	public PacketConstructor createPacketConstructor(int id, Class<?>... argumentTypes);
+	public PacketConstructor createPacketConstructor(int id, Object... arguments);
 	
 	/**
 	 * Retrieves a immutable set containing the ID of the sent server packets that will be observed by listeners.

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

@@ -25,6 +25,7 @@ import org.bukkit.WorldType;
 import org.bukkit.craftbukkit.CraftWorld;
 import org.bukkit.craftbukkit.inventory.CraftItemStack;
 import org.bukkit.entity.Entity;
+import org.bukkit.entity.Player;
 import org.bukkit.inventory.ItemStack;
 
 import com.comphenix.protocol.injector.StructureCache;
@@ -136,6 +137,11 @@ public class PacketContainer {
 			public ItemStack getSpecific(Object generic) {
 				return new CraftItemStack((net.minecraft.server.ItemStack) generic);
 			}
+			
+			@Override
+			public Class<ItemStack> getSpecificType() {
+				return ItemStack.class;
+			}
 		});
 	}
 	
@@ -170,6 +176,11 @@ public class PacketContainer {
 				}
 				return result;
 			}
+			
+			@Override
+			public Class<ItemStack[]> getSpecificType() {
+				return ItemStack[].class;
+			}
 		});
 	}
 	
@@ -199,6 +210,11 @@ public class PacketContainer {
 				net.minecraft.server.WorldType type = (net.minecraft.server.WorldType) generic;
 				return WorldType.getByName(type.name());
 			}
+			
+			@Override
+			public Class<WorldType> getSpecificType() {
+				return WorldType.class;
+			}
 		});
 	}
 	
@@ -216,6 +232,7 @@ public class PacketContainer {
 	
 		final Object worldServer = ((CraftWorld) world).getHandle();
 		final Class<?> nmsEntityClass = net.minecraft.server.Entity.class;
+		final World worldCopy = world;
 		
 		if (getEntity == null)
 			getEntity = FuzzyReflection.fromObject(worldServer).getMethodByParameters(
@@ -234,11 +251,20 @@ public class PacketContainer {
 				try {
 					net.minecraft.server.Entity nmsEntity = (net.minecraft.server.Entity) 
 							getEntity.invoke(worldServer, generic);
+					Integer id = (Integer) generic;
 					
 					// Attempt to get the Bukkit entity
 					if (nmsEntity != null) {
 						return nmsEntity.getBukkitEntity();
 					} else {
+						// Maybe it's a player that's just logged in? Try a search
+						for (Player player : worldCopy.getPlayers()) {
+							if (player.getEntityId() == id) {
+								return player;
+							}
+						}
+						
+						System.out.println("Entity doesn't exist.");
 						return null;
 					}
 					
@@ -250,6 +276,11 @@ public class PacketContainer {
 					throw new RuntimeException("Error occured in Minecraft method.", e.getCause());
 				}
 			}
+			
+			@Override
+			public Class<Entity> getSpecificType() {
+				return Entity.class;
+			}
 		});
 	}
 	

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

@@ -26,7 +26,7 @@ public class PacketConstructor {
 	 * <p>
 	 * Remember to call withPacket().
 	 */
-	public static PacketConstructor DEFAUALT = new PacketConstructor(null);
+	public static PacketConstructor DEFAULT = new PacketConstructor(null);
 	
 	// The constructor method that's actually responsible for creating the packet
 	private Constructor<?> constructorMethod;
@@ -141,11 +141,14 @@ public class PacketConstructor {
 					return false;
 				}
 			}
-		}
 			
 			return true;
 		}
 		
+		// Parameter count must match
+		return false;
+	}
+
 	public static class BukkitUnwrapper implements Unwrapper {
 	
 		private static Map<Class<?>, Method> cache = new ConcurrentHashMap<Class<?>, Method>();

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

@@ -326,8 +326,15 @@ public final class PacketFilterManager implements ProtocolManager {
 	}
 	
 	@Override
-	public PacketConstructor createPacketConstructor(int id, Class<?>... argumentTypes) {
-		return PacketConstructor.DEFAUALT.withPacket(id, argumentTypes);
+	public PacketConstructor createPacketConstructor(int id, Object... arguments) {
+		Class<?>[] types = new Class<?>[arguments.length];
+		
+		// Initialize types
+		for (int i = 0; i < arguments.length; i++) {
+			types[i] = arguments[i] != null ? arguments[i].getClass() : Object.class;
+		}
+		
+		return PacketConstructor.DEFAULT.withPacket(id, types);
 	}
 	
 	@Override

ProtocolLib/src/com/comphenix/protocol/reflect/EquivalentConverter.java

@@ -26,4 +26,5 @@ package com.comphenix.protocol.reflect;
 public interface EquivalentConverter<TType> {
 	public TType getSpecific(Object generic);
 	public Object getGeneric(TType specific);
+	public Class<TType> getSpecificType();
 }

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

@@ -220,12 +220,8 @@ public class StructureModifier<TField> {
 		
 		StructureModifier<T> result = subtypeCache.get(fieldType);
 		
-		if (this.fieldType.equals(fieldType)) {
-			
-			// We're dealing with the exact field type.
-			return withConverter(converter);
-			
-		} else if (result == null) {
+		// Do we need to update the cache?
+		if (result == null) {
 			List<Field> filtered = new ArrayList<Field>();
 			Set<Field> defaults = new HashSet<Field>();
 			
@@ -248,7 +244,24 @@ public class StructureModifier<TField> {
 		}
 		
 		// Add the target too
-		return result.withTarget(target);
+		result = result.withTarget(target);
+		
+		// And the converter, if it's needed
+		if (!sameConverter(result.converter, converter)) {
+			result = result.withConverter(converter);
+		}
+		
+		return result;
+	}
+	
+	private boolean sameConverter(EquivalentConverter<?> a, EquivalentConverter<?> b) {
+		// Compare the converter types
+		if (a == null)
+			return b == null;
+		else if (b == null)
+			return a == null;
+		else
+			return a.getSpecificType().equals(b.getSpecificType());
 	}
 	
 	/**