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/*******************************************************************************
* Copyright (c) 2006 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.team.internal.ui;
import org.eclipse.core.runtime.*;
import org.eclipse.jface.util.IPropertyChangeListener;
import org.eclipse.jface.util.PropertyChangeEvent;
/**
* Helper class for implementing property change handling
*/
public class PropertyChangeHandler {
private ListenerList fListeners = new ListenerList(ListenerList.IDENTITY);
/**
* Notifies listeners of property changes, handling any exceptions
*/
class PropertyNotifier implements ISafeRunnable {
private IPropertyChangeListener fListener;
private PropertyChangeEvent fEvent;
/**
* @see org.eclipse.core.runtime.ISafeRunnable#handleException(java.lang.Throwable)
*/
@Override
public void handleException(Throwable exception) {
TeamUIPlugin.log(IStatus.ERROR, TeamUIMessages.AbstractSynchronizeParticipant_5, exception);
}
/**
* @see org.eclipse.core.runtime.ISafeRunnable#run()
*/
@Override
public void run() throws Exception {
fListener.propertyChange(fEvent);
}
/**
* Notifies listeners of the property change
*
* @param event
* the property change event
*/
public void notify(PropertyChangeEvent event) {
if (fListeners == null) {
return;
}
fEvent = event;
Object[] copiedListeners = fListeners.getListeners();
for (int i = 0; i < copiedListeners.length; i++) {
fListener = (IPropertyChangeListener) copiedListeners[i];
SafeRunner.run(this);
}
fListener = null;
}
}
public void addPropertyChangeListener(IPropertyChangeListener listener) {
fListeners.add(listener);
}
public void removePropertyChangeListener(IPropertyChangeListener listener) {
fListeners.remove(listener);
}
public void firePropertyChange(Object source, String property, Object oldValue, Object newValue) {
PropertyNotifier notifier = new PropertyNotifier();
notifier.notify(new PropertyChangeEvent(source, property, oldValue, newValue));
}
}
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