org.eclipse.jdt.internal.core.BecomeWorkingCopyOperation Maven / Gradle / Ivy
/*******************************************************************************
* Copyright (c) 2000, 2015 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
* Stephan Herrmann - Contribution for
* Bug 458577 - IClassFile.getWorkingCopy() may lead to NPE in BecomeWorkingCopyOperation
*******************************************************************************/
package org.eclipse.jdt.internal.core;
import org.eclipse.core.resources.IResource;
import org.eclipse.jdt.core.*;
/**
* Switch and ICompilationUnit to working copy mode
* and signal the working copy addition through a delta.
*/
public class BecomeWorkingCopyOperation extends JavaModelOperation {
IProblemRequestor problemRequestor;
/*
* Creates a BecomeWorkingCopyOperation for the given working copy.
* perOwnerWorkingCopies map is not null if the working copy is a shared working copy.
*/
public BecomeWorkingCopyOperation(CompilationUnit workingCopy, IProblemRequestor problemRequestor) {
super(new IJavaElement[] {workingCopy});
this.problemRequestor = problemRequestor;
}
protected void executeOperation() throws JavaModelException {
// open the working copy now to ensure contents are that of the current state of this element
CompilationUnit workingCopy = getWorkingCopy();
JavaModelManager.getJavaModelManager().getPerWorkingCopyInfo(workingCopy, true/*create if needed*/, true/*record usage*/, this.problemRequestor);
workingCopy.openWhenClosed(workingCopy.createElementInfo(), true, this.progressMonitor);
if (!workingCopy.isPrimary()) {
// report added java delta for a non-primary working copy
JavaElementDelta delta = new JavaElementDelta(getJavaModel());
delta.added(workingCopy);
addDelta(delta);
} else {
IResource resource = workingCopy.getResource();
if (resource != null) {
if (resource.isAccessible()) {
// report a F_PRIMARY_WORKING_COPY change delta for a primary working copy
JavaElementDelta delta = new JavaElementDelta(getJavaModel());
delta.changed(workingCopy, IJavaElementDelta.F_PRIMARY_WORKING_COPY);
addDelta(delta);
} else {
// report an ADDED delta
JavaElementDelta delta = new JavaElementDelta(getJavaModel());
delta.added(workingCopy, IJavaElementDelta.F_PRIMARY_WORKING_COPY);
addDelta(delta);
}
}
}
this.resultElements = new IJavaElement[] {workingCopy};
}
/*
* Returns the working copy this operation is working on.
*/
protected CompilationUnit getWorkingCopy() {
return (CompilationUnit)getElementToProcess();
}
/*
* @see JavaModelOperation#isReadOnly
*/
public boolean isReadOnly() {
return true;
}
}