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 java.util.List;
  
  import org.eclipse.core.resources.IResource;
  import org.eclipse.core.runtime.CoreException;
  import org.eclipse.core.runtime.IProgressMonitor;
  import org.eclipse.core.runtime.SubProgressMonitor;
  import org.eclipse.ltk.core.refactoring.Change;
  import org.eclipse.ui.ide.undo.ResourceDescription;
  
  public class UndoablePackageDeleteChange extends DynamicValidationStateChange {
  
  	private final List/*<IResource>*/ fPackageDeletes;
  
  	public UndoablePackageDeleteChange(String name, List/*<IResource>*/ packageDeletes) {
  		super(name);
  		fPackageDeletes= packageDeletes;
  	}
  	
  	public Change perform(IProgressMonitor pm) throws CoreException {
  		int count= fPackageDeletes.size();
  		pm.beginTask("", count * 3); //$NON-NLS-1$
  		ResourceDescription[] packageDeleteDescriptions= new ResourceDescription[fPackageDeletes.size()];
  		for (int i= 0; i < fPackageDeletes.size(); i++) {
  			IResource resource= (IResource) fPackageDeletes.get(i);
  			packageDeleteDescriptions[i]= ResourceDescription.fromResource(resource);
  			pm.worked(1);
  		}
  		
  		DynamicValidationStateChange result= (DynamicValidationStateChange) super.perform(new SubProgressMonitor(pm, count));
  		
  		for (int i= 0; i < fPackageDeletes.size(); i++) {
  			IResource resource= (IResource) fPackageDeletes.get(i);
  			ResourceDescription resourceDescription= packageDeleteDescriptions[i];
  			resourceDescription.recordStateFromHistory(resource, new SubProgressMonitor(pm, 1));
  			result.add(new UndoDeleteResourceChange(resourceDescription));
  		}
  		return result;
  	}
  }
  