| /******************************************************************************* |
| * Copyright (c) 2006, 2008 Oracle. All rights reserved. |
| * This program and the accompanying materials are made available under the |
| * terms of the Eclipse Public License v1.0, which accompanies this distribution |
| * and is available at http://www.eclipse.org/legal/epl-v10.html. |
| * |
| * Contributors: |
| * Oracle - initial API and implementation |
| ******************************************************************************/ |
| package org.eclipse.jpt.common.ui.internal.jface; |
| |
| import org.eclipse.jface.viewers.ILabelProvider; |
| import org.eclipse.jface.viewers.ILabelProviderListener; |
| import org.eclipse.swt.graphics.Image; |
| |
| /** |
| * Null implementation of the ILabelProvider interface. |
| * Implemented as a singleton. |
| */ |
| public final class NullLabelProvider |
| implements ILabelProvider |
| { |
| public static final NullLabelProvider INSTANCE = new NullLabelProvider(); |
| |
| public static ILabelProvider instance() { |
| return INSTANCE; |
| } |
| |
| /** |
| * Ensure a single instance. |
| */ |
| private NullLabelProvider() { |
| super(); |
| } |
| |
| public Image getImage(Object element) { |
| return null; |
| } |
| |
| public String getText(Object element) { |
| return null; |
| } |
| |
| public void addListener(ILabelProviderListener listener) { |
| // do nothing |
| } |
| |
| public void dispose() { |
| // do nothing |
| } |
| |
| public boolean isLabelProperty(Object element, String property) { |
| return false; |
| } |
| |
| public void removeListener(ILabelProviderListener listener) { |
| // do nothing |
| } |
| |
| } |