AppendableList.java

/**
 * Copyright (c) 2006 Ecliptical Software Inc. 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:
 *     Ecliptical Software Inc. - initial API and implementation
 */
package org.eclipse.ecf.example.pubsub;

import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;

import org.eclipse.core.runtime.ISafeRunnable;
import org.eclipse.core.runtime.ListenerList;
import org.eclipse.core.runtime.SafeRunner;

public class AppendableList implements Serializable {

	private static final long serialVersionUID = -5447897626712251185L;

	private transient ListenerList listeners;
	
	protected final List values = new ArrayList();
	
	public void addListener(IAppendableListListener listener) {
		getListenerList().add(listener);
	}
	
	public void removeListener(IAppendableListListener listener) {
		getListenerList().remove(listener);
	}
	
	protected void fireAppended(final Object value) {
		Object[] l = getListenerList().getListeners();
		for (int i = 0; i < l.length; ++i) {
			final IAppendableListListener listener = (IAppendableListListener) l[i];
			SafeRunner.run(new ISafeRunnable() {
				
				public void run() throws Exception {
					listener.appended(AppendableList.this, value);
				}
				
				public void handleException(Throwable exception) {
					// TODO Auto-generated method stub
					exception.printStackTrace();
				}
			});
		}
	}
	
	protected synchronized ListenerList getListenerList() {
		if (listeners == null)
			listeners = new ListenerList();
		
		return listeners;
	}
	
	public synchronized Object[] getValues() {
		return values.toArray();
	}
	
	public synchronized boolean add(Object value) {
		boolean result = values.add(value);
		fireAppended(value);
		return result;
	}
	
	public synchronized String toString() {
		return values.toString();
	}
}