| /******************************************************************************* |
| * Copyright (c) 2006 IBM Corporation and others. |
| * |
| * This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License 2.0 |
| * which accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.team.internal.ui; |
| |
| import org.eclipse.core.runtime.ISafeRunnable; |
| import org.eclipse.core.runtime.IStatus; |
| import org.eclipse.core.runtime.ListenerList; |
| import org.eclipse.core.runtime.SafeRunner; |
| import org.eclipse.jface.util.IPropertyChangeListener; |
| import org.eclipse.jface.util.PropertyChangeEvent; |
| |
| /** |
| * Helper class for implementing property change handling |
| */ |
| public class PropertyChangeHandler { |
| private ListenerList<IPropertyChangeListener> fListeners = new ListenerList<>(ListenerList.IDENTITY); |
| |
| /** |
| * Notifies listeners of property changes, handling any exceptions |
| */ |
| class PropertyNotifier implements ISafeRunnable { |
| |
| private IPropertyChangeListener fListener; |
| private PropertyChangeEvent fEvent; |
| |
| @Override |
| public void handleException(Throwable exception) { |
| TeamUIPlugin.log(IStatus.ERROR, TeamUIMessages.AbstractSynchronizeParticipant_5, exception); |
| } |
| |
| @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 (Object copiedListener : copiedListeners) { |
| fListener = (IPropertyChangeListener) copiedListener; |
| 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)); |
| } |
| } |