/*
 * 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 3 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, see <http://www.gnu.org/licenses/>.
 */
package com.l2jserver.gameserver.handler;

import java.util.HashMap;
import java.util.Map;

/**
 * @author UnAfraid
 */
public class UserCommandHandler implements IHandler<IUserCommandHandler, Integer>
{
	private final Map<Integer, IUserCommandHandler> _datatable;
	
	protected UserCommandHandler()
	{
		_datatable = new HashMap<>();
	}
	
	@Override
	public void registerHandler(IUserCommandHandler handler)
	{
		int[] ids = handler.getUserCommandList();
		for (int id : ids)
		{
			_datatable.put(id, handler);
		}
	}
	
	@Override
	public synchronized void removeHandler(IUserCommandHandler handler)
	{
		int[] ids = handler.getUserCommandList();
		for (int id : ids)
		{
			_datatable.remove(id);
		}
	}
	
	@Override
	public IUserCommandHandler getHandler(Integer userCommand)
	{
		return _datatable.get(userCommand);
	}
	
	@Override
	public int size()
	{
		return _datatable.size();
	}
	
	public static UserCommandHandler getInstance()
	{
		return SingletonHolder._instance;
	}
	
	private static class SingletonHolder
	{
		protected static final UserCommandHandler _instance = new UserCommandHandler();
	}
}