1 /******************************************************************************* 2 * Copyright (c) 2003, 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.IStructuredContentProvider; 18 import org.eclipse.jface.viewers.Viewer; 19 import org.eclipse.ui.internal.navigator.NavigatorFilterService; 20 import org.eclipse.ui.navigator.INavigatorContentService; 21 22 /** 23 * 24 * <p> 25 * <strong>EXPERIMENTAL</strong>. This class or interface has been added as part of a work in 26 * progress. There is a guarantee neither that this API will work nor that it will remain the same. 27 * Please do not use this API without consulting with the Platform/UI team. 28 * </p> 29 * 30 * @since 3.2 31 * 32 */ 33 public class CommonFilterContentProvider implements IStructuredContentProvider { 34 35 private INavigatorContentService contentService; 36 private Object[] NO_ELEMENTS = new Object[0]; 37 38 39 @Override inputChanged(Viewer viewer, Object oldInput, Object newInput)40 public void inputChanged(Viewer viewer, Object oldInput, Object newInput) { 41 if (newInput instanceof INavigatorContentService) { 42 contentService = (INavigatorContentService) newInput; 43 } 44 } 45 46 @Override getElements(Object inputElement)47 public Object[] getElements(Object inputElement) { 48 if(contentService != null) { 49 NavigatorFilterService filterService = (NavigatorFilterService) contentService.getFilterService(); 50 return filterService.getVisibleFilterDescriptorsForUI(); 51 } 52 return NO_ELEMENTS ; 53 54 } 55 56 @Override dispose()57 public void dispose() { 58 59 } 60 61 } 62