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/*
 * Distributed as part of mchange-commons-java 0.2.11
 *
 * Copyright (C) 2015 Machinery For Change, Inc.
 *
 * Author: Steve Waldman 
 *
 * This library is free software; you can redistribute it and/or modify
 * it under the terms of EITHER:
 *
 *     1) The GNU Lesser General Public License (LGPL), version 2.1, as 
 *        published by the Free Software Foundation
 *
 * OR
 *
 *     2) The Eclipse Public License (EPL), version 1.0
 *
 * You may choose which license to accept if you wish to redistribute
 * or modify this work. You may offer derivatives of this work
 * under the license you have chosen, or you may provide the same
 * choice of license which you have been offered here.
 *
 * This software 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.
 *
 * You should have received copies of both LGPL v2.1 and EPL v1.0
 * along with this software; see the files LICENSE-EPL and LICENSE-LGPL.
 * If not, the text of these licenses are currently available at
 *
 * LGPL v2.1: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
 *  EPL v1.0: http://www.eclipse.org/org/documents/epl-v10.php 
 * 
 */

package com.mchange.v1.util;

import java.util.*;

public class SomethingChangedEventSupport
{
    Object source;
    Vector listeners = new Vector();

    public SomethingChangedEventSupport(Object source)
    {this.source = source;}

    public synchronized void addSomethingChangedListener(SomethingChangedListener mlistener)
    {
	if (! listeners.contains(mlistener))
	    listeners.addElement(mlistener);
    }

    public synchronized void removeSomethingChangedListener(SomethingChangedListener mlistener)
    {listeners.removeElement(mlistener);}

    public synchronized void fireSomethingChanged()
    {
	SomethingChangedEvent ae = new SomethingChangedEvent(source);
	for (Enumeration e = listeners.elements(); e.hasMoreElements();)
	    {
		SomethingChangedListener al = (SomethingChangedListener) e.nextElement();
		al.somethingChanged(ae);
	    }
    }
}