01: /*******************************************************************************
02: * Copyright (c) 2006 IBM Corporation and others.
03: * All rights reserved. This program and the accompanying materials
04: * are made available under the terms of the Eclipse Public License v1.0
05: * which accompanies this distribution, and is available at
06: * http://www.eclipse.org/legal/epl-v10.html
07: *
08: * Contributors:
09: * IBM Corporation - initial API and implementation
10: ******************************************************************************/package org.eclipse.ui.internal.navigator.filters;
11:
12: import org.eclipse.jface.viewers.Viewer;
13: import org.eclipse.jface.viewers.ViewerFilter;
14:
15: /**
16: *
17: * A no-op viewer filter used to prevent null return values from
18: * {@link CommonFilterDescriptor#createFilter()}.
19: *
20: * @since 3.2
21: *
22: */
23: public class SkeletonViewerFilter extends ViewerFilter {
24:
25: /**
26: * The singleton instance.
27: */
28: public static final SkeletonViewerFilter INSTANCE = new SkeletonViewerFilter();
29:
30: private SkeletonViewerFilter() {
31: }
32:
33: /*
34: * (non-Javadoc)
35: *
36: * @see org.eclipse.jface.viewers.ViewerFilter#select(org.eclipse.jface.viewers.Viewer,
37: * java.lang.Object, java.lang.Object)
38: */
39: public boolean select(Viewer viewer, Object parentElement,
40: Object element) {
41:
42: return true;
43: }
44:
45: }
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