content: /*******************************************************************************
   * Copyright (c) 2006, 2007 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.changes;
  
  import org.eclipse.core.resources.IFile;
  import org.eclipse.core.resources.IFolder;
  import org.eclipse.core.resources.IResource;
  import org.eclipse.core.runtime.CoreException;
  import org.eclipse.core.runtime.IProgressMonitor;
  import org.eclipse.core.runtime.OperationCanceledException;
  import org.eclipse.core.runtime.SubProgressMonitor;
  import org.eclipse.ltk.core.refactoring.Change;
  import org.eclipse.ltk.core.refactoring.RefactoringStatus;
  import org.eclipse.ui.ide.undo.ResourceDescription;
  import org.eclipse.wst.jsdt.internal.corext.refactoring.RefactoringCoreMessages;
  import org.eclipse.wst.jsdt.internal.corext.util.Messages;
  
  
  public class UndoDeleteResourceChange extends Change {
  
  	private final ResourceDescription fResourceDescription;
  
  	public UndoDeleteResourceChange(ResourceDescription resourceDescription) {
  		fResourceDescription= resourceDescription;
  	}
  	
  	public void initializeValidationData(IProgressMonitor pm) {
  		
  	}
  	
  	public Object getModifiedElement() {
  		return null;
  	}
  
  	public String getName() {
  		return Messages.format(RefactoringCoreMessages.UndoDeleteResourceChange_change_name, fResourceDescription.getName()); 
  	}
  
  	public RefactoringStatus isValid(IProgressMonitor pm) throws CoreException, OperationCanceledException {
  		if (! fResourceDescription.isValid()) {
  			return RefactoringStatus.createFatalErrorStatus(
  					Messages.format(
  							RefactoringCoreMessages.UndoDeleteResourceChange_cannot_restore,
  							fResourceDescription.getName()));
  		}
  		
  		if (fResourceDescription.verifyExistence(true)) {
  			return RefactoringStatus.createFatalErrorStatus(
  					Messages.format(
  							RefactoringCoreMessages.UndoDeleteResourceChange_already_exists,
  							fResourceDescription.getName()));
  		}
  		
  		return new RefactoringStatus();
  	}
  
  	public Change perform(IProgressMonitor pm) throws CoreException {
  		IResource created= fResourceDescription.createResource(pm);
  		created.refreshLocal(IResource.DEPTH_INFINITE, new SubProgressMonitor(pm, 1));
  		if (created instanceof IFile) {
  			return new DeleteFileChange((IFile) created, false);
  		} else if (created instanceof IFolder) {
  			return new DeleteFolderChange((IFolder) created, false);
  		} else {
  			return null; // should not happen
  		}
  	}
  	
  	public String toString() {
  		return "Remove " + fResourceDescription.getName(); //$NON-NLS-1$
  	}
  }
  