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Java > Open Source Codes > org > eclipse > jdt > internal > core > BecomeWorkingCopyOperation


1 /*******************************************************************************
2  * Copyright (c) 2000, 2006 IBM Corporation and others.
3  * All rights reserved. This program and the accompanying materials
4  * are made available under the terms of the Eclipse Public License v1.0
5  * which accompanies this distribution, and is available at
6  * http://www.eclipse.org/legal/epl-v10.html
7  *
8  * Contributors:
9  * IBM Corporation - initial API and implementation
10  *******************************************************************************/
11 package org.eclipse.jdt.internal.core;
12
13 import org.eclipse.jdt.core.*;
14 import org.eclipse.jdt.core.IJavaElement;
15 import org.eclipse.jdt.core.JavaModelException;
16
17 /**
18  * Switch and ICompilationUnit to working copy mode
19  * and signal the working copy addition through a delta.
20  */
21 public class BecomeWorkingCopyOperation extends JavaModelOperation {
22     
23     IProblemRequestor problemRequestor;
24     
25     /*
26      * Creates a BecomeWorkingCopyOperation for the given working copy.
27      * perOwnerWorkingCopies map is not null if the working copy is a shared working copy.
28      */
29     public BecomeWorkingCopyOperation(CompilationUnit workingCopy, IProblemRequestor problemRequestor) {
30         super(new IJavaElement[] {workingCopy});
31         this.problemRequestor = problemRequestor;
32     }
33     protected void executeOperation() throws JavaModelException {
34
35         // open the working copy now to ensure contents are that of the current state of this element
36 CompilationUnit workingCopy = getWorkingCopy();
37         JavaModelManager.getJavaModelManager().getPerWorkingCopyInfo(workingCopy, true/*create if needed*/, true/*record usage*/, this.problemRequestor);
38         workingCopy.openWhenClosed(workingCopy.createElementInfo(), this.progressMonitor);
39
40         if (!workingCopy.isPrimary()) {
41             // report added java delta for a non-primary working copy
42 JavaElementDelta delta = new JavaElementDelta(getJavaModel());
43             delta.added(workingCopy);
44             addDelta(delta);
45         } else {
46             if (workingCopy.getResource().isAccessible()) {
47                 // report a F_PRIMARY_WORKING_COPY change delta for a primary working copy
48 JavaElementDelta delta = new JavaElementDelta(getJavaModel());
49                 delta.changed(workingCopy, IJavaElementDelta.F_PRIMARY_WORKING_COPY);
50                 addDelta(delta);
51             } else {
52                 // report an ADDED delta
53 JavaElementDelta delta = new JavaElementDelta(this.getJavaModel());
54                 delta.added(workingCopy, IJavaElementDelta.F_PRIMARY_WORKING_COPY);
55                 addDelta(delta);
56             }
57         }
58
59         this.resultElements = new IJavaElement[] {workingCopy};
60     }
61     /*
62      * Returns the working copy this operation is working on.
63      */
64     protected CompilationUnit getWorkingCopy() {
65         return (CompilationUnit)getElementToProcess();
66     }
67     /*
68      * @see JavaModelOperation#isReadOnly
69      */
70     public boolean isReadOnly() {
71         return true;
72     }
73
74 }
75
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