/*
 *  JMule - Java file sharing client
 *  Copyright (C) 2007-2008 JMule team ( jmule@jmule.org / http://jmule.org )
 *
 *  Any parts of this program derived from other projects, or contributed
 *  by third-party developers are copyrighted by their respective authors.
 *
 *  This program is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU General Public License
 *  as published by the Free Software Foundation; either version 2
 *  of the License, or (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 *
 */

/*
 * Provenance note:
 * This file was extracted from the local JMule CVS donor tree by
 * tools/extract_jmule_backend.py and is now carried as WireShare-owned source.
 * The build must not depend on the donor jmule/ directory at compile time.
 */

package org.jmule.core.edonkey.packet;

import java.nio.ByteBuffer;

import org.jmule.core.utils.Convert;
import org.jmule.core.utils.Misc;

/**
 * 
 * @author binary256
 * @author javajox
 * @version $$Revision: 1.4 $$
 * Last changed by $$Author: binary255 $$ on $$Date: 2010/04/12 16:27:34 $$
 */
public class Packet {
	
	private ByteBuffer packet_data = null;
	
	public Packet() {
	}
	
	public Packet(int packetLength, byte protocol) {
		packet_data= Misc.getByteBuffer(packetLength + 1 + 4 + 1);
		packet_data.put(protocol);
		packet_data.putInt(packetLength+1);//Put length +1 to write command byte
		packet_data.put((byte)0);//Put default command
	}
	
	public void setCommand(byte packetCommand) {
		packet_data.put(5, packetCommand);
	}

	public byte getCommand() {
		return packet_data.get(5);
	}
	
	public void setProtocol(byte packetType) {
		packet_data.put(0,packetType);
	}
	
	public byte getProtocol() {
		return packet_data.get(0);
	}
	
	public void insertData(byte[] insertData) {
		packet_data.put(insertData);	
	}

	public void insertData(int startPos, byte[] insertData) {	
		packet_data.position(startPos);
		packet_data.put(insertData);
	}
	
	public void insertData(ByteBuffer insertData) {
		packet_data.put(insertData);	
	}
	
	public void insertData(int startPos,ByteBuffer insertData) {
		packet_data.position(startPos);
		packet_data.put(insertData.array());
	}

	public void insertData(long insertData) {
		packet_data.putLong(insertData);
	}
	
	public void insertData(int insertData) {
		packet_data.putInt(insertData);
	}

	public void insertData(short insertData) {
		packet_data.putShort(insertData);
	}

	public void insertData(byte insertData) {
		packet_data.put(insertData);
	}

	public byte[] getPacket() {
		return packet_data.array();
	}

	public ByteBuffer getAsByteBuffer() {
		return packet_data;
	}

	public int getLength() {
		return packet_data.capacity();
	}
	
	public void clear() {	
		if (packet_data==null) return ;
		packet_data.clear();
		packet_data.compact();
		packet_data.rewind();
		packet_data.limit(0);
		packet_data = null;
	}
	
	public String toString() {
		return Convert.byteToHexString(packet_data.array()," 0x");
	}
	
}
