content: /*******************************************************************************
   * Copyright (c) 2000, 2010 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.IFile;
  import org.eclipse.jface.viewers.Viewer;
  import org.eclipse.jface.viewers.ViewerFilter;
  import org.eclipse.wst.jsdt.core.IClassFile;
  import org.eclipse.wst.jsdt.core.IJavaScriptUnit;
  import org.eclipse.wst.jsdt.core.IPackageFragment;
  import org.eclipse.wst.jsdt.core.JavaScriptCore;
  import org.eclipse.wst.jsdt.core.JavaScriptModelException;
  
  
  /**
   * Filters out all compilation units and class files elements.
   */
  public class JavaFileFilter  extends ViewerFilter {
  	
  	/**
  	 * Returns the result of this filter, when applied to the
  	 * given inputs.
  	 *
  	 * @return Returns true if element should be included in filtered set
  	 */
  	public boolean select(Viewer viewer, Object parent, Object element) {
  		if (element instanceof IJavaScriptUnit)
  			return false;
  		if (element instanceof IClassFile)
  			return false;
  			
  		if (element instanceof IPackageFragment) {
  			try {
  				return ((IPackageFragment)element).getNonJavaScriptResources().length > 0;
  			} catch (JavaScriptModelException ex) {
  				return true;
  			}
  		}
  		return !(element instanceof IFile && JavaScriptCore.isJavaScriptLikeFileName(((IFile) element).getName()));
  	}
  }
  