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/*******************************************************************************
* Copyright (c) 2000, 2007 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.core;
import java.util.HashMap;
import java.util.Map;
import org.eclipse.core.runtime.*;
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 properties;
ListenerList listeners;
/* (non-Javadoc)
* @see org.eclipse.team.ui.mapping.ISynchronizeOperationContext#addProperty(java.lang.String, java.lang.Object)
*/
public synchronized void put(String name, Object value) {
if (properties == null) {
properties = new HashMap();
}
properties.put(name, value);
}
public synchronized Object get(String name) {
if (properties == null)
return null;
return properties.get(name);
}
/* (non-Javadoc)
* @see org.eclipse.team.ui.mapping.ISynchronizeOperationContext#removeProperty(java.lang.String)
*/
public synchronized void remove(String name) {
if (properties != null)
properties.remove(name);
if (properties.isEmpty()) {
properties = null;
}
}
/* (non-Javadoc)
* @see org.eclipse.team.ui.mapping.ISynchronizeOperationContext#addDisposeListener(org.eclipse.team.ui.mapping.IDisposeListener)
*/
public synchronized void addCacheListener(ICacheListener listener) {
if (listeners == null)
listeners = new ListenerList(ListenerList.IDENTITY);
listeners.add(listener);
}
/* (non-Javadoc)
* @see org.eclipse.team.ui.mapping.ISynchronizeOperationContext#removeDisposeListener(org.eclipse.team.ui.mapping.IDisposeListener)
*/
public synchronized void removeDisposeListener(ICacheListener listener) {
removeCacheListener(listener);
}
/* (non-Javadoc)
* @see org.eclipse.team.core.ICache#removeCacheListener(org.eclipse.team.core.ICacheListener)
*/
public synchronized void removeCacheListener(ICacheListener listener) {
if (listeners != null)
listeners.remove(listener);
}
/* (non-Javadoc)
* @see org.eclipse.team.ui.mapping.ISynchronizationContext#dispose()
*/
public void dispose() {
if (listeners != null) {
Object[] allListeners = listeners.getListeners();
for (int i = 0; i < allListeners.length; i++) {
final Object listener = allListeners[i];
SafeRunner.run(new ISafeRunnable(){
public void run() throws Exception {
((ICacheListener)listener).cacheDisposed(Cache.this);
}
public void handleException(Throwable exception) {
// Ignore since the platform logs the error
}
});
}
}
properties = null;
}
}
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