/*
 * Created on Jul 15, 2004
 */
package com.realpersist.gef.model;

import java.beans.PropertyChangeListener;
import java.beans.PropertyChangeSupport;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.Serializable;

/**
 * Provides base class support for model objects to participate in event handling framework
 * @author Phil Zoio
 */
public abstract class PropertyAwareObject extends Object implements Serializable
{

	public static final String CHILD = "CHILD";
	public static final String REORDER = "REORDER";
	public static final String BOUNDS = "BOUNDS";
	public static final String INPUT = "INPUT";
	public static final String OUTPUT = "OUTPUT";
	public static final String NAME = "NAME";
	public static final String LAYOUT = "LAYOUT";
	
	protected transient PropertyChangeSupport listeners = new PropertyChangeSupport(this);

	protected PropertyAwareObject()
	{
	}

	public void addPropertyChangeListener(PropertyChangeListener l)
	{
		listeners.addPropertyChangeListener(l);
	}

	public void removePropertyChangeListener(PropertyChangeListener l)
	{
		listeners.removePropertyChangeListener(l);
	}
	
	protected void firePropertyChange(String prop, Object old, Object newValue)
	{
		listeners.firePropertyChange(prop, old, newValue);
	}	

	private void readObject(ObjectInputStream in) throws IOException, ClassNotFoundException
	{
		in.defaultReadObject();
		listeners = new PropertyChangeSupport(this);
	}

}