content: /*
   *  ProtocolLib - Bukkit server library that allows access to the Minecraft protocol.
   *  Copyright (C) 2012 Kristian S. Stangeland
   *
   *  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., 59 Temple Place, Suite 330, Boston, MA 
   *  02111-1307 USA
   */
  
  package com.comphenix.protocol.async;
  
  import com.comphenix.protocol.events.PacketEvent;
  import com.google.common.base.Preconditions;
  import com.google.common.collect.ComparisonChain;
  import com.google.common.primitives.Longs;
  
  /**
   * Provides a comparable to a packet event.
   * 
   * @author Kristian
   */
  class PacketEventHolder implements Comparable<PacketEventHolder> {
  
  	private PacketEvent event;
  	private long sendingIndex = 0;
  	
  	/**
  	 * A wrapper that ensures the packet event is ordered by sending index.
  	 * @param event - packet event to wrap.
  	 */
  	public PacketEventHolder(PacketEvent event) {
  		this.event = Preconditions.checkNotNull(event, "Event must be non-null");
  		
  		if (event.getAsyncMarker() != null)
  			this.sendingIndex = event.getAsyncMarker().getNewSendingIndex();
  	}
  
  	/**
  	 * Retrieve the stored event.
  	 * @return The stored event.
  	 */
  	public PacketEvent getEvent() {
  		return event;
  	}
  	
  	@Override
  	public int compareTo(PacketEventHolder other) {
  		return ComparisonChain.start().
  			   compare(sendingIndex, other.sendingIndex).
  			   result();
  	}
  	
  	@Override
  	public boolean equals(Object other) {
  		// Standard equals
  		if (other == this)
  			return true;
  		if (other instanceof PacketEventHolder)
  			return sendingIndex == ((PacketEventHolder) other).sendingIndex;
  		else
  			return false;
  	}
  	
  	@Override
  	public int hashCode() {
  		return Longs.hashCode(sendingIndex);
  	}
  }
  