content: /*******************************************************************************
   * Copyright (c) 2000, 2008 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.wst.jsdt.internal.corext.refactoring;
  
  import org.eclipse.core.resources.IResource;
  import org.eclipse.core.resources.ResourcesPlugin;
  import org.eclipse.core.runtime.Assert;
  import org.eclipse.core.runtime.CoreException;
  import org.eclipse.core.runtime.IPath;
  import org.eclipse.core.runtime.IProgressMonitor;
  import org.eclipse.core.runtime.SubProgressMonitor;
  import org.eclipse.ltk.core.refactoring.Change;
  import org.eclipse.wst.jsdt.core.JavaScriptCore;
  import org.eclipse.wst.jsdt.internal.corext.refactoring.base.JDTChange;
  
  public abstract class AbstractJavaElementRenameChange extends JDTChange {
  
  	private final String fNewName;
  
  	private final String fOldName;
  
  	private final IPath fResourcePath;
  
  	private final long fStampToRestore;
  
  	protected AbstractJavaElementRenameChange(IPath resourcePath, String oldName, String newName) {
  		this(resourcePath, oldName, newName, IResource.NULL_STAMP);
  	}
  
  	protected AbstractJavaElementRenameChange(IPath resourcePath, String oldName, String newName, long stampToRestore) {
  		Assert.isNotNull(newName, "new name"); //$NON-NLS-1$
  		Assert.isNotNull(oldName, "old name"); //$NON-NLS-1$
  		fResourcePath= resourcePath;
  		fOldName= oldName;
  		fNewName= newName;
  		fStampToRestore= stampToRestore;
  	}
  
  	protected abstract IPath createNewPath();
  
  	protected abstract Change createUndoChange(long stampToRestore) throws CoreException;
  
  	protected abstract void doRename(IProgressMonitor pm) throws CoreException;
  
  	public Object getModifiedElement() {
  		return JavaScriptCore.create(getResource());
  	}
  
  	public String getNewName() {
  		return fNewName;
  	}
  
  	public String getOldName() {
  		return fOldName;
  	}
  
  	protected final IResource getResource() {
  		return ResourcesPlugin.getWorkspace().getRoot().findMember(fResourcePath);
  	}
  
  	protected IPath getResourcePath() {
  		return fResourcePath;
  	}
  
  	public final Change perform(IProgressMonitor pm) throws CoreException {
  		try {
  			pm.beginTask(RefactoringCoreMessages.AbstractRenameChange_Renaming, 1);
  			IResource resource= getResource();
  			IPath newPath= createNewPath();
  			Change result= createUndoChange(resource.getModificationStamp());
  			doRename(new SubProgressMonitor(pm, 1));
  			if (fStampToRestore != IResource.NULL_STAMP) {
  				IResource newResource= ResourcesPlugin.getWorkspace().getRoot().findMember(newPath);
  				newResource.revertModificationStamp(fStampToRestore);
  			}
  			return result;
  		} finally {
  			pm.done();
  		}
  	}
  }
  