content: /*******************************************************************************
   * Copyright (c) 2000, 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;
  
  
  import org.eclipse.jface.resource.ImageDescriptor;
  import org.eclipse.ui.model.IWorkbenchAdapter;
  import org.eclipse.wst.jsdt.core.IJavaScriptElement;
  import org.eclipse.wst.jsdt.core.IParent;
  import org.eclipse.wst.jsdt.core.JavaScriptModelException;
  import org.eclipse.wst.jsdt.internal.ui.javaeditor.IClassFileEditorInput;
  import org.eclipse.wst.jsdt.internal.ui.viewsupport.JavaElementImageProvider;
  import org.eclipse.wst.jsdt.ui.JavaScriptElementLabels;
  
  /**
   * An imlementation of the IWorkbenchAdapter for IJavaElements.
   */
  public class JavaWorkbenchAdapter implements IWorkbenchAdapter {
  	
  	protected static final Object[] NO_CHILDREN= new Object[0];
  	
  	private JavaElementImageProvider fImageProvider;
  	
  	public JavaWorkbenchAdapter() {
  		fImageProvider= new JavaElementImageProvider();
  	}
  
  	public Object[] getChildren(Object element) {
  		IJavaScriptElement je= getJavaElement(element);
  		if (je instanceof IParent) {
  			try {
  				return ((IParent)je).getChildren();
  			} catch(JavaScriptModelException e) {
  				JavaScriptPlugin.log(e); 
  			}
  		}
  		return NO_CHILDREN;
  	}
  
  	public ImageDescriptor getImageDescriptor(Object element) {
  		IJavaScriptElement je= getJavaElement(element);
  		if (je != null)
  			return fImageProvider.getJavaImageDescriptor(je, JavaElementImageProvider.OVERLAY_ICONS | JavaElementImageProvider.SMALL_ICONS);
  		
  		return null;
  		
  	}
  
  	public String getLabel(Object element) {
  		return JavaScriptElementLabels.getTextLabel(getJavaElement(element), JavaScriptElementLabels.ALL_DEFAULT);
  	}
  
  	public Object getParent(Object element) {
  		IJavaScriptElement je= getJavaElement(element);
  		return je != null ? je.getParent() :  null;
  	}
  	
  	private IJavaScriptElement getJavaElement(Object element) {
  		if (element instanceof IJavaScriptElement)
  			return (IJavaScriptElement)element;
  		if (element instanceof IClassFileEditorInput)
  			return ((IClassFileEditorInput)element).getClassFile().getPrimaryElement();
  
  		return null;
  	}
  }
  