content: /*******************************************************************************
   * Copyright (c) 2000, 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.ui.util;
  
  import java.util.ArrayList;
  import java.util.Arrays;
  import java.util.Iterator;
  import java.util.List;
  
  import org.eclipse.core.resources.IResource;
  import org.eclipse.jface.viewers.ISelection;
  import org.eclipse.jface.viewers.IStructuredSelection;
  import org.eclipse.jface.viewers.StructuredSelection;
  import org.eclipse.ui.IWorkbenchPage;
  import org.eclipse.ui.IWorkbenchPart;
  import org.eclipse.ui.IWorkbenchPartReference;
  import org.eclipse.ui.IWorkbenchWindow;
  import org.eclipse.ui.part.ISetSelectionTarget;
  
  public class SelectionUtil {
  
  	public static List toList(ISelection selection) {
  		if (selection instanceof IStructuredSelection)
  			return ((IStructuredSelection) selection).toList();
  		return null;
  	}
  
  	/**
  	 * Returns the selected element if the selection consists of a single
  	 * element only.
  	 * 
  	 * @param s the selection
  	 * @return the selected first element or null
  	 */
  	public static Object getSingleElement(ISelection s) {
  		if (! (s instanceof IStructuredSelection))
  			return null;
  		IStructuredSelection selection= (IStructuredSelection) s;
  		if (selection.size() != 1)
  			return null;
  
  		return selection.getFirstElement();
  	}
  
  
  	/**
  	 * Attempts to select and reveal the specified resources in all parts within
  	 * the supplied workbench window's active page.
  	 * <p>
  	 * Checks all parts in the active page to see if they implement
  	 * <code>ISetSelectionTarget</code>, either directly or as an adapter. If
  	 * so, tells the part to select and reveal the specified resources.
  	 * </p>
  	 * 
  	 * @param resources the resources to be selected and revealed
  	 * @param window the workbench window to select and reveal the resource
  	 * 
  	 * @see ISetSelectionTarget
  	 * 
  	 * @see org.eclipse.ui.wizards.newresource.BasicNewResourceWizard#selectAndReveal(IResource,
  	 *      IWorkbenchWindow)
  	 */
  	public static void selectAndReveal(IResource[] resources, IWorkbenchWindow window) {
  		// validate the input
  		if (window == null || resources == null || Arrays.asList(resources).contains(null)) {
  			return;
  		}
  		IWorkbenchPage page= window.getActivePage();
  		if (page == null) {
  			return;
  		}
  
  		// get all the view and editor parts
  		List parts= new ArrayList();
  		IWorkbenchPartReference refs[]= page.getViewReferences();
  		for (int i= 0; i < refs.length; i++) {
  			IWorkbenchPart part= refs[i].getPart(false);
  			if (part != null) {
  				parts.add(part);
  			}
  		}
  		refs= page.getEditorReferences();
  		for (int i= 0; i < refs.length; i++) {
  			if (refs[i].getPart(false) != null) {
  				parts.add(refs[i].getPart(false));
  			}
  		}
  
  		final ISelection selection= new StructuredSelection(resources);
  		Iterator itr= parts.iterator();
  		while (itr.hasNext()) {
  			IWorkbenchPart part= (IWorkbenchPart) itr.next();
  
  			// get the part's ISetSelectionTarget implementation
  			ISetSelectionTarget target= null;
  			if (part instanceof ISetSelectionTarget) {
  				target= (ISetSelectionTarget) part;
  			} else {
  				target= (ISetSelectionTarget) part.getAdapter(ISetSelectionTarget.class);
  			}
  
  			if (target != null) {
  				// select and reveal resource
  				final ISetSelectionTarget finalTarget= target;
  				window.getShell().getDisplay().asyncExec(new Runnable() {
  					public void run() {
  						finalTarget.selectReveal(selection);
  					}
  				});
  			}
  		}
  	}
  
  }
  