/*******************************************************************************
* Copyright (c) 2004, 2005 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.gef.examples.text.model;
import java.beans.PropertyChangeListener;
import java.beans.PropertyChangeSupport;
import java.io.Serializable;
/**
* @since 3.1
*/
public class Notifier
implements Serializable
{
protected transient PropertyChangeSupport listeners;
private static final long serialVersionUID = 1;
public void addPropertyChangeListener(PropertyChangeListener l) {
if (listeners == null)
listeners = new PropertyChangeSupport(this);
listeners.addPropertyChangeListener(l);
}
protected void firePropertyChange(String prop, Object old, Object newValue) {
if (listeners != null)
listeners.firePropertyChange(prop, old, newValue);
}
public void removePropertyChangeListener(PropertyChangeListener l) {
if (listeners != null)
listeners.removePropertyChangeListener(l);
}
}