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/*******************************************************************************
* Copyright (c) 2000, 2004 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.cdt.internal.core.model;
import java.util.Map;
import org.eclipse.cdt.core.model.ICElement;
import org.eclipse.cdt.core.model.CModelException;
/**
* Destroys a working copy (remove it from its cache if it is shared)
* and signal its removal through a delta.
*/
public class DestroyWorkingCopyOperation extends CModelOperation {
public DestroyWorkingCopyOperation(ICElement workingCopy) {
super(new ICElement[] {workingCopy});
}
/**
* @exception CModelException if setting the source
* of the original translation unit fails
*/
protected void executeOperation() throws CModelException {
WorkingCopy workingCopy = getWorkingCopy();
workingCopy.close();
// if original element is not on classpath flush it from the cache
ICElement originalElement = workingCopy.getOriginalElement();
if (!workingCopy.getParent().exists()) {
((TranslationUnit)originalElement).close();
}
// remove working copy from the cache if it is shared
CModelManager manager = CModelManager.getDefault();
// In order to be shared, working copies have to denote the same compilation unit
// AND use the same buffer factory.
// Assuming there is a little set of buffer factories, then use a 2 level Map cache.
Map sharedWorkingCopies = manager.sharedWorkingCopies;
Map perFactoryWorkingCopies = (Map) sharedWorkingCopies.get(workingCopy.bufferFactory);
if (perFactoryWorkingCopies != null) {
if (perFactoryWorkingCopies.remove(originalElement) != null) {
//System.out.println("Destroying shared working copy " + workingCopy.toStringWithAncestors());//$NON-NLS-1$
//CModelManager.getDefault().fire(delta, ElementChangedEvent.POST_RECONCILE);
}
}
// report C deltas
CElementDelta delta = new CElementDelta(this.getCModel());
delta.removed(workingCopy);
addDelta(delta);
removeReconcileDelta(workingCopy);
}
/**
* Returns the working copy this operation is working on.
*/
protected WorkingCopy getWorkingCopy() {
return (WorkingCopy)getElementToProcess();
}
/**
* @see CModelOperation#isReadOnly
*/
public boolean isReadOnly() {
return true;
}
}
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