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