org.eclipse.xwt.tools.ui.designer.core/src/org/eclipse/xwt/tools/ui/designer/core/editor/commandstack/CommandWrap4EMF.java

/*******************************************************************************
 * Copyright (c) 2006, 2010 Soyatec (http://www.soyatec.com) and others.
 * 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:
 *     Soyatec - initial API and implementation
 *******************************************************************************/
package org.eclipse.xwt.tools.ui.designer.core.editor.commandstack;

import java.util.Collection;
import java.util.Collections;

import org.eclipse.gef.commands.Command;

public class CommandWrap4EMF extends Command {
	private org.eclipse.emf.common.command.Command command;

	/**
	 * Constructor for CommandWrap4EMF.
	 */
	public CommandWrap4EMF(org.eclipse.emf.common.command.Command command) {
		this.command = command;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.gef.commands.Command#canExecute()
	 */
	public boolean canExecute() {
		return command == null ? false : command.canExecute();
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.gef.commands.Command#canUndo()
	 */
	public boolean canUndo() {
		return command == null ? false : command.canUndo();
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.gef.commands.Command#chain(Command)
	 */
	public Command chain(Command command) {
		Command chained = this;
		if (command != null) {
			org.eclipse.emf.common.command.Command emfCommand = null;
			if (command instanceof CommandWrap4EMF) {
				emfCommand = ((CommandWrap4EMF) command).unwrap();
			} else {
				emfCommand = new CommandWrap4GEF(command);
			}
			emfCommand = this.command.chain(emfCommand);
			if (emfCommand != null) {
				if (emfCommand instanceof CommandWrap4GEF) {
					chained = ((CommandWrap4GEF) emfCommand).unwrap();
				} else {
					chained = new CommandWrap4EMF(emfCommand);
				}
			}
		}
		return chained;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.gef.commands.Command#dispose()
	 */
	public void dispose() {
		if (command != null)
			command.dispose();
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.gef.commands.Command#execute()
	 */
	public void execute() {
		if (command != null)
			command.execute();
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.gef.commands.Command#getLabel()
	 */
	public String getLabel() {
		return command == null ? "CommandWrap4EMF" : command.getLabel(); //$NON-NLS-1$
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.gef.commands.Command#redo()
	 */
	public void redo() {
		if (command != null)
			command.redo();
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.gef.commands.Command#undo()
	 */
	public void undo() {
		if (command != null)
			command.undo();
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.gef.commands.Command#getAffectedObjects()
	 */
	public Collection<?> getAffectedObjects() {
		return command == null ? Collections.EMPTY_LIST : command.getAffectedObjects();
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.gef.commands.Command#getDescription()
	 */
	public String getDescription() {
		return command == null ? "CommandWrap4EMF" : command.getDescription(); //$NON-NLS-1$
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.gef.commands.Command#getResult()
	 */
	public Collection<?> getResult() {
		return command == null ? Collections.EMPTY_LIST : command.getResult();
	}

	public org.eclipse.emf.common.command.Command unwrap() {
		return command;
	}

}