| /******************************************************************************* |
| * Copyright (c) 2009 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.utility.internal; |
| |
| import org.eclipse.jpt.common.utility.Command; |
| |
| /** |
| * Straightforward implementation of {@link StatefulCommandExecutor}. |
| */ |
| public class SimpleCommandExecutor |
| implements StatefulCommandExecutor |
| { |
| private boolean active = false; |
| |
| public SimpleCommandExecutor() { |
| super(); |
| } |
| |
| public void start() { |
| if (this.active) { |
| throw new IllegalStateException("Not stopped."); //$NON-NLS-1$ |
| } |
| this.active = true; |
| } |
| |
| public void execute(Command command) { |
| if (this.active) { |
| command.execute(); |
| } |
| } |
| |
| public void stop() { |
| if ( ! this.active) { |
| throw new IllegalStateException("Not started."); //$NON-NLS-1$ |
| } |
| this.active = false; |
| } |
| |
| } |