/*******************************************************************************
* Copyright (c) 2005,2006 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.ui.preferences;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import org.eclipse.core.runtime.preferences.IEclipsePreferences;
import org.eclipse.ui.internal.preferences.WorkingCopyPreferences;
import org.osgi.service.prefs.BackingStoreException;
/**
* WorkingCopyManager is a concrete implementation of an
* IWorkingCopyManager.
* <p>
* This class is not intended to be sub-classed by clients.
* </p>
* @since 3.2
*/
public class WorkingCopyManager implements IWorkingCopyManager{
private static final String EMPTY_STRING = "";//$NON-NLS-1$
// all working copies - maps absolute path to PreferencesWorkingCopy instance
private Map workingCopies = new HashMap();
/* (non-Javadoc)
* @see org.eclipse.ui.preferences.IWorkingCopyManager#getWorkingCopy(org.eclipse.core.runtime.preferences.IEclipsePreferences)
*/
public IEclipsePreferences getWorkingCopy(IEclipsePreferences original) {
if (original instanceof WorkingCopyPreferences) {
throw new IllegalArgumentException("Trying to get a working copy of a working copy"); //$NON-NLS-1$
}
String absolutePath = original.absolutePath();
IEclipsePreferences preferences = (IEclipsePreferences) workingCopies.get(absolutePath);
if (preferences == null) {
preferences = new WorkingCopyPreferences(original, this);
workingCopies.put(absolutePath, preferences);
}
return preferences;
}
/* (non-Javadoc)
* @see org.eclipse.ui.preferences.IWorkingCopyManager#applyChanges()
*/
public void applyChanges() throws BackingStoreException {
for (Iterator i = workingCopies.values().iterator(); i.hasNext();) {
WorkingCopyPreferences prefs = (WorkingCopyPreferences) i.next();
if (prefs.nodeExists(EMPTY_STRING))
prefs.flush();
}
}
}