| /******************************************************************************* |
| * Copyright (c) 2000, 2017 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.core; |
| |
| import java.util.HashMap; |
| import java.util.Map; |
| |
| import org.eclipse.core.runtime.ISafeRunnable; |
| import org.eclipse.core.runtime.ListenerList; |
| import org.eclipse.core.runtime.SafeRunner; |
| import org.eclipse.team.core.ICache; |
| import org.eclipse.team.core.ICacheListener; |
| |
| /** |
| * A synchronize operation context that supports caching of |
| * properties relevant to the operation and the registering of |
| * dispose listeners. |
| * |
| * @see org.eclipse.team.core.ICache |
| * @since 3.2 |
| */ |
| public class Cache implements ICache { |
| |
| Map<String, Object> properties; |
| ListenerList<ICacheListener> listeners; |
| |
| @Override |
| public synchronized void put(String name, Object value) { |
| if (properties == null) { |
| properties = new HashMap<>(); |
| } |
| properties.put(name, value); |
| } |
| |
| @Override |
| public synchronized Object get(String name) { |
| if (properties == null) |
| return null; |
| return properties.get(name); |
| } |
| |
| @Override |
| public synchronized void remove(String name) { |
| if (properties != null) |
| properties.remove(name); |
| if (properties.isEmpty()) { |
| properties = null; |
| } |
| |
| } |
| |
| @Override |
| public synchronized void addCacheListener(ICacheListener listener) { |
| if (listeners == null) |
| listeners = new ListenerList<>(ListenerList.IDENTITY); |
| listeners.add(listener); |
| |
| } |
| |
| @Override |
| public synchronized void removeDisposeListener(ICacheListener listener) { |
| removeCacheListener(listener); |
| } |
| |
| @Override |
| public synchronized void removeCacheListener(ICacheListener listener) { |
| if (listeners != null) |
| listeners.remove(listener); |
| } |
| |
| public void dispose() { |
| if (listeners != null) { |
| for (ICacheListener listener : listeners) { |
| SafeRunner.run(new ISafeRunnable(){ |
| @Override |
| public void run() throws Exception { |
| listener.cacheDisposed(Cache.this); |
| } |
| @Override |
| public void handleException(Throwable exception) { |
| // Ignore since the platform logs the error |
| |
| } |
| }); |
| } |
| } |
| properties = null; |
| } |
| |
| } |