/*******************************************************************************
 * Copyright (c) 2000, 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.logicdesigner.model;

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

import org.eclipse.ui.views.properties.IPropertyDescriptor;
import org.eclipse.ui.views.properties.IPropertySource;

abstract public class LogicElement
	implements IPropertySource, Cloneable, Serializable
{

public static final String
	CHILDREN = "Children", 	//$NON-NLS-1$
	INPUTS = "inputs",	//$NON-NLS-1$
	OUTPUTS = "outputs";	//$NON-NLS-1$

transient protected PropertyChangeSupport listeners = new PropertyChangeSupport(this);
static final long serialVersionUID = 1;

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

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

protected void fireChildAdded(String prop, Object child, Object index) {
	listeners.firePropertyChange(prop, index, child);
}

protected void fireChildRemoved(String prop, Object child) {
	listeners.firePropertyChange(prop, child, null);
}

protected void fireStructureChange(String prop, Object child){
	listeners.firePropertyChange(prop, null, child);
}

public Object getEditableValue(){
	return this;
}

public IPropertyDescriptor[] getPropertyDescriptors(){
	return new IPropertyDescriptor[0];
}

public Object getPropertyValue(Object propName){
	return null;
}

final Object getPropertyValue(String propName){
	return null;
}

public boolean isPropertySet(Object propName){
	return isPropertySet((String)propName);
}

final boolean isPropertySet(String propName){
	return true;
}

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

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

public void resetPropertyValue(Object propName){
}

final void resetPropertyValue(String propName){}

public void setPropertyValue(Object propName, Object val){}
final void setPropertyValue(String propName, Object val){}

public void update(){
}

}