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.*;
  
  import org.bukkit.plugin.Plugin;
  
  /**
   * Represents a NO OPERATION listener.
   * 
   * @author Kristian
   */
  class NullPacketListener implements PacketListener {
  	
  	private ListeningWhitelist sendingWhitelist;
  	private ListeningWhitelist receivingWhitelist;
  	private Plugin plugin;
  
  	/**
  	 * Create a no-op listener with the same whitelist and plugin as the given listener.
  	 * @param original - the packet listener to copy.
  	 */
  	public NullPacketListener(PacketListener original) {
  		this.sendingWhitelist = cloneWhitelist(ListenerPriority.LOW, original.getSendingWhitelist());
  		this.receivingWhitelist = cloneWhitelist(ListenerPriority.LOW, original.getReceivingWhitelist());
  		this.plugin = original.getPlugin();
  	}
  
  	@Override
  	public void onPacketSending(PacketEvent event) {
  		// NULL
  	}
  
  	@Override
  	public void onPacketReceiving(PacketEvent event) {
  		// NULL
  	}
  
  	@Override
  	public ListeningWhitelist getSendingWhitelist() {
  		return sendingWhitelist;
  	}
  
  	@Override
  	public ListeningWhitelist getReceivingWhitelist() {
  		return receivingWhitelist;
  	}
  	
  	private ListeningWhitelist cloneWhitelist(ListenerPriority priority, ListeningWhitelist whitelist) {
  		if (whitelist != null) 
  			// We don't use the Bukkit API, so don't engage the ProtocolLib synchronization code
  			return ListeningWhitelist.newBuilder(whitelist).priority(priority).mergeOptions(ListenerOptions.ASYNC).build();
  		else 
  			return null;
  	}
  
  	@Override
  	public Plugin getPlugin() {
  		return plugin;
  	}
  }
  