/*******************************************************************************
 * Copyright (c) 2013 RCP Vision (http://www.rcp-vision.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:
 * Lorenzo Bettini - initial API and implementation
 *******************************************************************************/
package org.eclipse.emf.parsley.edit;

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

import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.edit.command.AbstractOverrideableCommand;
import org.eclipse.emf.edit.domain.EditingDomain;
import org.eclipse.emf.parsley.util.EObjectState;

/**
 * @author Lorenzo Bettini - Initial contribution and API
 * 
 */
public class EditCommand extends AbstractOverrideableCommand {

	EObject original;

	EObjectState state;

	/**
	 * @param domain
	 * @param label
	 */
	public EditCommand(EditingDomain domain, String label, EObject original,
			EObjectState state) {
		super(domain, label);
		this.original = original;
		this.state = state;
	}

	@Override
	protected boolean prepare() {
		return true;
	}

	@Override
	public void doExecute() {
		// nothing to do, it's already up to date, since
		// the original object has been edited.
	}

	@Override
	public void doUndo() {
		EObjectState tempState = new EObjectState(original);
		state.copyStateTo(original);
		state = tempState;
	}

	@Override
	public void doRedo() {
		EObjectState tempState = new EObjectState(original);
		state.copyStateTo(original);
		state = tempState;
	}

	@Override
	public Collection<EObject> doGetAffectedObjects() {
		return Collections.singleton(original);
	}

}