1 /*******************************************************************************
2  * Copyright (c) 2006, 2015 IBM Corporation and others.
3  *
4  * This program and the accompanying materials
5  * are made available under the terms of the Eclipse Public License 2.0
6  * which accompanies this distribution, and is available at
7  * https://www.eclipse.org/legal/epl-2.0/
8  *
9  * SPDX-License-Identifier: EPL-2.0
10  *
11  * Contributors:
12  *     IBM Corporation - initial API and implementation
13  ******************************************************************************/
14 
15 package org.eclipse.ui.internal.navigator.filters;
16 
17 import org.eclipse.jface.viewers.Viewer;
18 import org.eclipse.jface.viewers.ViewerFilter;
19 
20 /**
21  *
22  * A no-op viewer filter used to prevent null return values from
23  * {@link CommonFilterDescriptor#createFilter()}.
24  *
25  * @since 3.2
26  *
27  */
28 public class SkeletonViewerFilter extends ViewerFilter {
29 
30 	/**
31 	 * The singleton instance.
32 	 */
33 	public static final SkeletonViewerFilter INSTANCE = new SkeletonViewerFilter();
34 
SkeletonViewerFilter()35 	private SkeletonViewerFilter() {
36 	}
37 
38 	@Override
select(Viewer viewer, Object parentElement, Object element)39 	public boolean select(Viewer viewer, Object parentElement, Object element) {
40 
41 		return true;
42 	}
43 
44 }
45