/*
 This file belongs to the Servoy development and deployment environment, Copyright (C) 1997-2010 Servoy BV

 This program is free software; you can redistribute it and/or modify it under
 the terms of the GNU Affero 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 Affero General Public License for more details.

 You should have received a copy of the GNU Affero General Public License along
 with this program; if not, see http://www.gnu.org/licenses or write to the Free
 Software Foundation,Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
 */
package com.servoy.j2db.util;

import java.io.ByteArrayOutputStream;
import java.util.Collections;
import java.util.Enumeration;
import java.util.Properties;
import java.util.TreeSet;

import net.jcip.annotations.ThreadSafe;

@ThreadSafe
public class SortedProperties extends Properties
{
	@Override
	public synchronized Enumeration<Object> keys()//return a sorted list
	{
		return Collections.enumeration(new TreeSet<Object>(super.keySet()));
	}

	public synchronized String toFileString()
	{
		try
		{
			ByteArrayOutputStream out = new ByteArrayOutputStream();
			store(out, null);
			return out.toString();
		}
		catch (Exception e)
		{
			Debug.error(e);
			return null;
		}
	}
}