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/***************************************************************************
* Copyright (c) 2004 - 2008 Eike Stepper, Germany.
* 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:
* Eike Stepper - initial API and implementation
**************************************************************************/
package org.eclipse.net4j.internal.util.event;
import org.eclipse.net4j.internal.util.bundle.OM;
import org.eclipse.net4j.util.event.IEvent;
import org.eclipse.net4j.util.event.IListener;
import org.eclipse.net4j.util.event.INotifier;
import java.util.ArrayList;
import java.util.List;
/**
* @author Eike Stepper
*/
public class Notifier implements INotifier.Introspection
{
/**
* TODO Optimize by storing an array
*/
private List<IListener> listeners = new ArrayList<IListener>(0);
public Notifier()
{
}
public void addListener(IListener listener)
{
synchronized (listeners)
{
listeners.add(listener);
}
}
public void removeListener(IListener listener)
{
synchronized (listeners)
{
listeners.remove(listener);
}
}
public boolean hasListeners()
{
return !listeners.isEmpty();
}
public IListener[] getListeners()
{
synchronized (listeners)
{
return listeners.toArray(new IListener[listeners.size()]);
}
}
public void fireEvent(IEvent event)
{
for (IListener listener : getListeners())
{
try
{
listener.notifyEvent(event);
}
catch (Exception ex)
{
OM.LOG.error(ex);
}
}
}
}
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