Added a custom exception. Simplified the event API.

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

@@ -11,8 +11,8 @@ public class PacketEvent extends EventObject {
 	private static final long serialVersionUID = -5360289379097430620L;
 
 	private PacketContainer packet;
-	private Player sender;
+	private Player player;
-	private Player reciever;
+	private boolean serverPacket;
 	private boolean cancel;
 	
 	/**
@@ -23,11 +23,11 @@ public class PacketEvent extends EventObject {
 		super(source);
 	}
 
-	private PacketEvent(Object source, PacketContainer packet, Player sender, Player reciever) {
+	private PacketEvent(Object source, PacketContainer packet, Player player, boolean serverPacket) {
 		super(source);
 		this.packet = packet;
-		this.sender = sender;
+		this.player = player;
-		this.reciever = reciever;
+		this.serverPacket = serverPacket;
 	}
 
 	/**
@@ -38,7 +38,7 @@ public class PacketEvent extends EventObject {
 	 * @return The event.
 	 */
 	public static PacketEvent fromClient(Object source, PacketContainer packet, Player client) {
-		return new PacketEvent(source, packet, client, null);
+		return new PacketEvent(source, packet, client, false);
 	}
 	
 	/**
@@ -49,7 +49,7 @@ public class PacketEvent extends EventObject {
 	 * @return The event.
 	 */
 	public static PacketEvent fromServer(Object source,  PacketContainer packet, Player recipient) {
-		return new PacketEvent(source, packet, null, recipient);
+		return new PacketEvent(source, packet, recipient, true);
 	}
 	
 	/**
@@ -93,27 +93,18 @@ public class PacketEvent extends EventObject {
 	}
 
 	/**
-	 * Retrieves the player that has sent the packet.
+	 * Retrieves the player that has sent the packet or is recieving it.
-	 * @return The sender, or NULL if the server is sending the packet.
+	 * @return The player associated with this event.
 	 */
-	public Player getSender() {
+	public Player getPlayer() {
-		return sender;
+		return player;
 	}
 	
-	/**
-	 * Retrieves the player that will recieve the packet.
-	 * @return The reciever, or NULL if the server is recieving the packet.
-	 */
-	public Player getReciever() {
-		return reciever;
-	}
-	
-
 	/**
 	 * Whether or not this packet was created by the server.
 	 * @return TRUE if the packet was created by the server, FALSE if it was created by a client.
 	 */
 	public boolean isServerPacket() {
-		return getReciever() != null;
+		return serverPacket;
 	}
 }

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

@@ -0,0 +1,34 @@
+package com.comphenix.protocol.reflect;
+
+/**
+ * Invoked when a field is inaccessible due to security limitations, or when it simply doesn't exist.
+ * 
+ * @author Kristian
+ */
+public class FieldAccessException extends Exception {
+
+	/**
+	 * Generated by Eclipse.
+	 */
+	private static final long serialVersionUID = 1911011681494034617L;
+
+	public FieldAccessException() {
+		super();
+	}
+	
+	public FieldAccessException(String message, Throwable cause) {
+		super(message, cause);
+	}
+
+	public FieldAccessException(String message) {
+		super(message);
+	}
+
+	public FieldAccessException(Throwable cause) {
+		super(cause);
+	}
+	
+	public static FieldAccessException fromFormat(String message, Object... params) {
+		return new FieldAccessException(String.format(message, params));
+	}
+}

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

@@ -71,31 +71,37 @@ public class StructureModifier<TField> {
 	 * Reads the value of a field given its index.
 	 * @param fieldIndex - index of the field.
 	 * @return Value of the field.
-	 * @throws IllegalAccessException If we're unable to read the field due to a security limitation.
+	 * @throws FieldAccessException The field doesn't exist, or it cannot be accessed under the current security contraints.
 	 */
 	@SuppressWarnings("unchecked")
-	public TField read(int fieldIndex) throws IllegalAccessException {
+	public TField read(int fieldIndex) throws FieldAccessException {
 		if (fieldIndex < 0 || fieldIndex >= data.size())
-			throw new IllegalArgumentException("Field index must be within 0 - count");
+			throw new FieldAccessException("Field index must be within 0 - count", 
+					new IndexOutOfBoundsException("Out of bounds"));
 		if (target == null)
 			throw new IllegalStateException("Cannot read from a NULL target.");
 		
-		Object result = FieldUtils.readField(data.get(fieldIndex), target, true);
+		try {
+			Object result = FieldUtils.readField(data.get(fieldIndex), target, true);
 			
-		// Use the converter, if we have it
+			// Use the converter, if we have it
-		if (converter != null)
+			if (converter != null)
-			return converter.getSpecific(result);
+				return converter.getSpecific(result);
-		else
+			else
-			return (TField) result;
+				return (TField) result;
+			
+		} catch (IllegalAccessException e) {
+			throw new FieldAccessException("Cannot read field due to a security limitation.", e);
+		}
 	}
 
 	/**
 	 * Reads the value of a field if and ONLY IF it exists.
 	 * @param fieldIndex - index of the field.
 	 * @return Value of the field, or NULL if it doesn't exist.
-	 * @throws IllegalAccessException If we're unable to read the field due to a security limitation.
+	 * @throws FieldAccessException The field cannot be accessed under the current security contraints.
 	 */
-	public TField readSafely(int fieldIndex) throws IllegalAccessException {
+	public TField readSafely(int fieldIndex) throws FieldAccessException {
 		if (fieldIndex >= 0 && fieldIndex < data.size()) {
 			return read(fieldIndex);
 		} else {
@@ -108,17 +114,23 @@ public class StructureModifier<TField> {
 	 * @param fieldIndex - index of the field.
 	 * @param value - new value of the field.
 	 * @return This structure modifier - for chaining.
-	 * @throws IllegalAccessException If we're unable to write to the field due to a security limitation.
+	 * @throws IllegalAccessException The field doesn't exist, or it cannot be accessed under the current security contraints.
 	 */
-	public StructureModifier<TField> write(int fieldIndex, TField value) throws IllegalAccessException {
+	public StructureModifier<TField> write(int fieldIndex, TField value) throws FieldAccessException {
 		if (fieldIndex < 0 || fieldIndex >= data.size())
-			throw new IllegalArgumentException("Field index must be within 0 - count");
+			throw new FieldAccessException("Field index must be within 0 - count", 
+					new IndexOutOfBoundsException("Out of bounds"));
 		if (target == null)
 			throw new IllegalStateException("Cannot write to a NULL target.");
 		
 		// Use the converter, if it exists
 		Object obj = converter != null ? converter.getGeneric(value) : value;
-		FieldUtils.writeField(data.get(fieldIndex), target, obj, true);
+		
+		try {
+			FieldUtils.writeField(data.get(fieldIndex), target, obj, true);
+		} catch (IllegalAccessException e) {
+			throw new FieldAccessException("Cannot read field due to a security limitation.", e);
+		}
 		
 		// Make this method chainable
 		return this;
@@ -129,9 +141,9 @@ public class StructureModifier<TField> {
 	 * @param fieldIndex - index of the potential field.
 	 * @param value - new value of the field.
 	 * @return This structure modifer - for chaining.
-	 * @throws IllegalAccessException If we're unable to write to the field due to a security limitation.
+	 * @throws IllegalAccessException The field cannot be accessed under the current security contraints.
 	 */
-	public StructureModifier<TField> writeSafely(int fieldIndex, TField value) throws IllegalAccessException {
+	public StructureModifier<TField> writeSafely(int fieldIndex, TField value) throws FieldAccessException {
 		if (fieldIndex >= 0 && fieldIndex < data.size()) {
 			write(fieldIndex, value);
 		}
@@ -143,9 +155,9 @@ public class StructureModifier<TField> {
 	 * @param fieldIndex - index of the field to modify.
 	 * @param select - the function that modifies the field value.
 	 * @return This structure modifier - for chaining.
-	 * @throws IllegalAccessException
+	 * @throws IllegalAccessException The field cannot be accessed under the current security contraints.
 	 */
-	public StructureModifier<TField> modify(int fieldIndex, Function<TField, TField> select) throws IllegalAccessException {
+	public StructureModifier<TField> modify(int fieldIndex, Function<TField, TField> select) throws FieldAccessException {
 		TField value = read(fieldIndex);
 		return write(fieldIndex, select.apply(value));
 	}