| /******************************************************************************* |
| * Copyright (c) 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.ui.internal.widgets; |
| |
| import org.eclipse.jface.dialogs.Dialog; |
| |
| /** |
| * A <code>null</code> instance of <code>PostExecution</code>. |
| * |
| * @version 2.0 |
| * @since 1.0 |
| */ |
| public final class NullPostExecution implements PostExecution<Dialog> { |
| |
| /** |
| * The singleton instance of this <code>NullPostExecution</code>. |
| */ |
| private static PostExecution<Dialog> INSTANCE; |
| |
| /** |
| * Creates a new <code>NullPostExecution</code>. |
| */ |
| private NullPostExecution() { |
| super(); |
| } |
| |
| /** |
| * Returns the singleton instance of this <code>NullPostExecution</code>. |
| * |
| * @param <T> The dialog where this <code>PostExecution</code> will be used |
| * @return The singleton instance with the proper type |
| */ |
| @SuppressWarnings("unchecked") |
| public static synchronized <T extends Dialog> PostExecution<T> instance() { |
| |
| if (INSTANCE == null) { |
| INSTANCE = new NullPostExecution(); |
| } |
| |
| return (PostExecution<T>) INSTANCE; |
| } |
| |
| /* |
| * (non-Javadoc) |
| */ |
| public void execute(Dialog dialog) { |
| // Nothing to do |
| } |
| } |