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* JBoss, Home of Professional Open Source
* Copyright 2005, JBoss Inc., and individual contributors as indicated
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.ow2.bonita.util;
import java.util.ArrayList;
import java.util.List;
/**
* default implementation of the {@link Observable} interface.
*
* @author Tom Baeyens
*/
public class DefaultObservable implements Observable {
protected List listeners = null;
public void addListener(Listener listener) {
if (listener == null) {
String message = ExceptionManager.getInstance().getFullMessage("bp_DO_1");
throw new BonitaRuntimeException(message);
}
if (listeners == null) {
listeners = new ArrayList();
}
listeners.add(listener);
}
public void removeListener(Listener listener) {
if (listener == null) {
String message = ExceptionManager.getInstance().getFullMessage("bp_DO_2");
throw new BonitaRuntimeException(message);
}
if (listeners != null) {
listeners.remove(listener);
}
}
public Listener addListener(Listener listener, String eventName) {
if (eventName == null) {
String message = ExceptionManager.getInstance().getFullMessage("bp_DO_3");
throw new BonitaRuntimeException(message);
}
List eventNames = new ArrayList();
eventNames.add(eventName);
return addListener(listener, eventNames);
}
public Listener addListener(Listener listener, List eventNames) {
if (listener == null) {
String message = ExceptionManager.getInstance().getFullMessage("bp_DO_4");
throw new BonitaRuntimeException(message);
}
if (eventNames == null) {
String message = ExceptionManager.getInstance().getFullMessage("bp_DO_5");
throw new BonitaRuntimeException(message);
}
FilterListener filterListener = new FilterListener(listener, eventNames);
addListener(filterListener);
return filterListener;
}
public void fire(String eventName) {
fire(eventName, null);
}
public void fire(String eventName, Object info) {
if (listeners != null) {
for (Listener listener : listeners) {
listener.event(this, eventName, info);
}
}
}
public List getListeners() {
return listeners;
}
}
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