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.filters;
  
  import org.eclipse.core.resources.IFolder;
  import org.eclipse.core.resources.IResource;
  import org.eclipse.core.runtime.CoreException;
  import org.eclipse.jface.viewers.Viewer;
  import org.eclipse.jface.viewers.ViewerFilter;
  import org.eclipse.wst.jsdt.core.IJavaScriptElement;
  import org.eclipse.wst.jsdt.core.IPackageFragment;
  import org.eclipse.wst.jsdt.core.JavaScriptCore;
  
  public class NoPackageContainingFoldersFilter extends ViewerFilter {
  
  	/*
  	 * @see ViewerFilter
  	 */
  	public boolean select(Viewer viewer, Object parent, Object element) {
  		if (element instanceof IFolder) {
  			try {
  				if (containsPackage((IFolder)element))
  					return true;
  				else
  					return false;
  			} catch (CoreException e) {
  				return true;
  			}
  		}
  
  		return true;
  	}
  	
  	private boolean containsPackage(IFolder folder) throws CoreException {
  		IJavaScriptElement element= JavaScriptCore.create(folder);
  		if (element instanceof IPackageFragment)
  			return true;
  		IResource[] resources= folder.members();
  		for (int i= 0; i < resources.length; i++) {
  			if (resources[i] instanceof IFolder && containsPackage((IFolder)resources[i]))
  				return true;
  		}
  		return false;
  	}
  
  }
  