package net.ms.designer.editors.componentdetail.models;

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;


/**
 * @author lili
 * 
 * Ԫ�ػ���
 */
public class AbstractElement implements IPropertySource, Cloneable,Serializable 
{
	


    public static final String CHILDREN = "Children";
	
	transient protected PropertyChangeSupport listeners = new PropertyChangeSupport(this); //defind listeners

	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() 
	{
	}
}