case-study/jdt-before/core refactoring/org/eclipse/jdt/internal/corext/refactoring/AbstractJavaElementRenameChange.java

   1 /*******************************************************************************
   2  * Copyright (c) 2000, 2011 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.corext.refactoring;
  12
  13 import org.eclipse.core.runtime.Assert;
  14 import org.eclipse.core.runtime.CoreException;
  15 import org.eclipse.core.runtime.IPath;
  16 import org.eclipse.core.runtime.IProgressMonitor;
  17 import org.eclipse.core.runtime.SubProgressMonitor;
  18
  19 import org.eclipse.core.resources.IResource;
  20 import org.eclipse.core.resources.ResourcesPlugin;
  21
  22 import org.eclipse.ltk.core.refactoring.Change;
  23 import org.eclipse.ltk.core.refactoring.resource.ResourceChange;
  24
  25 import org.eclipse.jdt.core.JavaCore;
  26
  27 public abstract class AbstractJavaElementRenameChange extends ResourceChange {
  28
  29         private final String fNewName;
  30
  31         private final String fOldName;
  32
  33         private final IPath fResourcePath;
  34
  35         private final long fStampToRestore;
  36
  37         protected AbstractJavaElementRenameChange(IPath resourcePath, String oldName, String newName) {
  38                 this(resourcePath, oldName, newName, IResource.NULL_STAMP);
  39         }
  40
  41         protected AbstractJavaElementRenameChange(IPath resourcePath, String oldName, String newName, long stampToRestore) {
  42                 Assert.isNotNull(newName, "new name"); //$NON-NLS-1$
  43                 Assert.isNotNull(oldName, "old name"); //$NON-NLS-1$
  44                 fResourcePath= resourcePath;
  45                 fOldName= oldName;
  46                 fNewName= newName;
  47                 fStampToRestore= stampToRestore;
  48         }
  49
  50         protected abstract IPath createNewPath();
  51
  52         protected abstract Change createUndoChange(long stampToRestore) throws CoreException;
  53
  54         protected abstract void doRename(IProgressMonitor pm) throws CoreException;
  55
  56         @Override
  57         public Object getModifiedElement() {
  58                 return JavaCore.create(getResource());
  59         }
  60
  61         @Override
  62         protected IResource getModifiedResource() {
  63                 return getResource();
  64         }
  65
  66         public String getNewName() {
  67                 return fNewName;
  68         }
  69
  70         public String getOldName() {
  71                 return fOldName;
  72         }
  73
  74         protected final IResource getResource() {
  75                 return ResourcesPlugin.getWorkspace().getRoot().findMember(fResourcePath);
  76         }
  77
  78         protected IPath getResourcePath() {
  79                 return fResourcePath;
  80         }
  81
  82         @Override
  83         public final Change perform(IProgressMonitor pm) throws CoreException {
  84                 try {
  85                         pm.beginTask(RefactoringCoreMessages.AbstractRenameChange_Renaming, 1);
  86                         IResource resource= getResource();
  87                         IPath newPath= createNewPath();
  88                         Change result= createUndoChange(resource.getModificationStamp());
  89                         doRename(new SubProgressMonitor(pm, 1));
  90                         if (fStampToRestore != IResource.NULL_STAMP) {
  91                                 IResource newResource= ResourcesPlugin.getWorkspace().getRoot().findMember(newPath);
  92                                 newResource.revertModificationStamp(fStampToRestore);
  93                         }
  94                         return result;
  95                 } finally {
  96                         pm.done();
  97                 }
  98         }
  99 }