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Java > Open Source Codes > org > eclipse > jdt > internal > ui > filters > NonJavaElementFilter


1 /*******************************************************************************
2  * Copyright (c) 2000, 2005 IBM Corporation and others.
3  * All rights reserved. This program and the accompanying materials
4  * are made available under the terms of the Eclipse Public License v1.0
5  * which accompanies this distribution, and is available at
6  * http://www.eclipse.org/legal/epl-v10.html
7  *
8  * Contributors:
9  * IBM Corporation - initial API and implementation
10  *******************************************************************************/

11 package org.eclipse.jdt.internal.ui.filters;
12
13 import org.eclipse.core.resources.IProject;
14 import org.eclipse.core.resources.IResource;
15 import org.eclipse.core.resources.IStorage;
16
17 import org.eclipse.jface.viewers.Viewer;
18 import org.eclipse.jface.viewers.ViewerFilter;
19
20 import org.eclipse.jdt.core.IJavaElement;
21
22
23 /**
24  * Filters out all non-Java elements.
25  */

26 public class NonJavaElementFilter extends ViewerFilter {
27     
28     /**
29      * Returns the result of this filter, when applied to the
30      * given inputs.
31      *
32      * @return Returns true if element should be included in filtered set
33      */

34     public boolean select(Viewer viewer, Object JavaDoc parent, Object JavaDoc element) {
35         if (element instanceof IJavaElement)
36             return true;
37         
38         if (element instanceof IResource) {
39             IProject project= ((IResource)element).getProject();
40             return project == null || !project.isOpen();
41         }
42
43         // Exclude all IStorage elements which are neither Java elements nor resources
44
if (element instanceof IStorage)
45             return false;
46             
47         return true;
48     }
49 }
50
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