| /******************************************************************************* |
| * 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; |
| } |
| @Override |
| 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 |
| */ |
| @Override |
| public boolean isReadOnly() { |
| return true; |
| } |
| |
| } |