1 /*******************************************************************************
2  * Copyright (c) 2000, 2011 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 package org.eclipse.jdt.internal.debug.ui.actions;
15 
16 
17 import org.eclipse.debug.core.DebugException;
18 import org.eclipse.jdt.debug.core.IJavaDebugTarget;
19 import org.eclipse.jdt.internal.debug.core.model.JDIArrayEntryVariable;
20 import org.eclipse.jdt.internal.debug.ui.IJDIPreferencesConstants;
21 import org.eclipse.jdt.internal.debug.ui.JDIDebugUIPlugin;
22 import org.eclipse.jface.viewers.Viewer;
23 
24 /**
25  * Shows non-final static variables
26  */
27 public class ShowNullArrayEntriesAction extends ViewFilterAction {
28 
ShowNullArrayEntriesAction()29 	public ShowNullArrayEntriesAction() {
30 		super();
31 	}
32 
33 	/**
34 	 * @see ViewFilterAction#getPreferenceKey()
35 	 */
36 	@Override
getPreferenceKey()37 	protected String getPreferenceKey() {
38 		return IJDIPreferencesConstants.PREF_SHOW_NULL_ARRAY_ENTRIES;
39 	}
40 
41 	/**
42 	 * @see org.eclipse.jface.viewers.ViewerFilter#select(org.eclipse.jface.viewers.Viewer, java.lang.Object, java.lang.Object)
43 	 */
44 	@Override
select(Viewer viewer, Object parentElement, Object element)45 	public boolean select(Viewer viewer, Object parentElement, Object element) {
46 		if (getValue()) {
47 			// when on, filter nothing
48 			return true;
49 		}
50 		if (element instanceof JDIArrayEntryVariable) {
51 			JDIArrayEntryVariable variable = (JDIArrayEntryVariable)element;
52 			try {
53 				return !variable.getValue().equals(((IJavaDebugTarget)variable.getDebugTarget()).nullValue());
54 			} catch (DebugException e) {
55 				JDIDebugUIPlugin.log(e);
56 			}
57 		}
58 		return true;
59 	}
60 }
61