| /******************************************************************************* |
| * Copyright (c) 2005, 2012 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.core.tests.internal.registry.simple.utils; |
| |
| import java.util.LinkedList; |
| import java.util.List; |
| import org.eclipse.core.runtime.*; |
| |
| /** |
| * Allows test cases to wait for event notification so they can make assertions on the event. |
| * Similar to org.eclipse.core.tests.harness.TestRegistryChangeListener. |
| * @since 3.2 |
| */ |
| public class SimpleRegistryListener implements IRegistryChangeListener { |
| |
| private List events = new LinkedList(); |
| |
| public synchronized void registryChanged(IRegistryChangeEvent newEvent) { |
| events.add(newEvent); |
| notify(); |
| } |
| |
| /** |
| * Returns the first event that is received, blocking for at most <code>timeout</code> milliseconds. |
| * Returns <code>null</code> if a event was not received for the time allowed. |
| * |
| * @param timeout the maximum time to wait in milliseconds. If zero, this method will |
| * block until an event is received |
| * @return the first event received, or <code>null</code> if none was received |
| */ |
| public synchronized IRegistryChangeEvent getEvent(long timeout) { |
| if (!events.isEmpty()) |
| return (IRegistryChangeEvent) events.remove(0); |
| try { |
| wait(timeout); |
| } catch (InterruptedException e) { |
| // nothing to do |
| } |
| return events.isEmpty() ? null : (IRegistryChangeEvent) events.remove(0); |
| } |
| |
| public void register(IExtensionRegistry registry) { |
| registry.addRegistryChangeListener(this); |
| } |
| |
| public void unregister(IExtensionRegistry registry) { |
| registry.removeRegistryChangeListener(this); |
| } |
| } |