content: /*******************************************************************************
   * Copyright (c) 2007, 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.ui.workingsets;
  
  import java.util.ArrayList;
  
  import org.eclipse.core.resources.IProject;
  import org.eclipse.core.resources.IResource;
  import org.eclipse.core.runtime.CoreException;
  import org.eclipse.core.runtime.IAdaptable;
  import org.eclipse.ui.IWorkingSet;
  import org.eclipse.ui.IWorkingSetElementAdapter;
  import org.eclipse.wst.jsdt.core.IJavaScriptElement;
  import org.eclipse.wst.jsdt.core.JavaScriptCore;
  
  public class JavaWorkingSetElementAdapter implements IWorkingSetElementAdapter {
  
  	public IAdaptable[] adaptElements(IWorkingSet ws, IAdaptable[] elements) {
  		ArrayList result= new ArrayList(elements.length);
  		
  		for (int i= 0; i < elements.length; i++) {
  			IAdaptable curr= elements[i];
  			if (curr instanceof IJavaScriptElement) {
  				result.add(curr);
  			} else if (curr instanceof IResource) {
  				result.add(adaptFromResource((IResource) curr));
  			} else {
  				Object elem= curr.getAdapter(IJavaScriptElement.class);
  				if (elem == null) {
  					elem= curr.getAdapter(IResource.class);
  					if (elem != null) {
  						elem= adaptFromResource((IResource) elem);
  					}
  				}
  				if (elem != null) {
  					result.add(elem);
  				} // ignore all others
  			}
  		}
  		return (IAdaptable[]) result.toArray(new IAdaptable[result.size()]);
  	}
  	
  	private Object adaptFromResource(IResource resource) {
  		IProject project= resource.getProject();
  		if (project != null && project.isAccessible()) {
  			try {
  				if (project.hasNature(JavaScriptCore.NATURE_ID)) {
  					IJavaScriptElement elem= JavaScriptCore.create(resource);
  					if (elem != null) {
  						return elem;
  					}
  				}
  			} catch (CoreException e) {
  				// ignore
  			}
  		}
  		return resource;
  	}
  	
  
  	public void dispose() {
  	}
  
  }
  