examples/org.eclipse.team.examples.filesystem/src/org/eclipse/team/examples/pessimistic/ui/RemoveFromControlAction.java

/*******************************************************************************
 * Copyright (c) 2000, 2004 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.team.examples.pessimistic.ui;

import java.lang.reflect.InvocationTargetException;
import java.util.*;

import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.jface.action.IAction;
import org.eclipse.jface.operation.IRunnableWithProgress;
import org.eclipse.team.examples.pessimistic.PessimisticFilesystemProvider;

/**
 * Removes the selected resources and their children resources from
 * the control of the provider.
 */
public class RemoveFromControlAction extends PessimisticProviderAction {
	
	/**
	 * Collects the selected resources into sets by project,
	 * then removes the resources from the provider associated
	 * with their containing project.
	 * 
	 * @see org.eclipse.ui.IActionDelegate#run(IAction)
	 */
	public void run(IAction action) {
		IResource[] resources= getSelectedResources();
		if (resources == null || resources.length == 0)
			return;
		Set resourceSet= new HashSet(resources.length);
		for(int i= 0; i < resources.length; i++) {
			IResource resource= resources[i];
			recursivelyAdd(resource, resourceSet);
		}
		if (!resourceSet.isEmpty()) {
			final Map byProject= sortByProject(resourceSet);			
			IRunnableWithProgress runnable= new IRunnableWithProgress() {
				public void run(IProgressMonitor monitor)
					throws InvocationTargetException, InterruptedException {
					for (Iterator i= byProject.keySet().iterator(); i.hasNext();) {
						IProject project= (IProject) i.next();
						PessimisticFilesystemProvider provider= getProvider(project);
						if (provider != null) {
							Set set= (Set)byProject.get(project);
							IResource[] resources= new IResource[set.size()];
							set.toArray(resources);
							provider.removeFromControl(resources, monitor);
						}
					}
				}
			};
			runWithProgressDialog(runnable);
		}
	}

	/**
	 * Answers <code>true</code> if and only if the resource is not <code>null</code>,
	 * not a project or the workspace root, and is controlled by the provider.
	 * 
	 * @see org.eclipse.team.examples.pessimistic.ui.PessimisticProviderAction#shouldEnableFor(IResource)
	 */
	protected boolean shouldEnableFor(IResource resource) {
		if (resource == null) {
			return false;
		}
		if ((resource.getType() & (IResource.ROOT | IResource.PROJECT)) != 0) {
			return false;
		}
		PessimisticFilesystemProvider provider= getProvider(resource);
		if (provider == null)
			return false;
		return provider.isControlled(resource);
	}

}