org.eclipse.gmf.runtime.emf.type.core/src/org/eclipse/gmf/runtime/emf/type/core/commands/ConfigureRelationshipCommand.java

/******************************************************************************
 * Copyright (c) 2005, 2006 IBM Corporation 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:
 *    IBM Corporation - initial API and implementation 
 ****************************************************************************/

package org.eclipse.gmf.runtime.emf.type.core.commands;

import org.eclipse.gmf.runtime.emf.type.core.requests.ConfigureRequest;
import org.eclipse.gmf.runtime.emf.type.core.requests.CreateRelationshipRequest;

/**
 * Edit command to configure a new relationship element with the characteristics
 * of its element type.
 * 
 * @author ldamus
 */
public abstract class ConfigureRelationshipCommand
	extends ConfigureElementCommand {

	/**
	 * Constructs a new element configuration command for the
	 * <code>request</code>.
	 * 
	 * @param request
	 *            the element configuration request
	 */
	public ConfigureRelationshipCommand(ConfigureRequest request) {

		super(request);
	}

	public boolean canExecute() {
		Object source = ((ConfigureRequest) getRequest())
			.getParameter(CreateRelationshipRequest.SOURCE);

		Object target = ((ConfigureRequest) getRequest())
			.getParameter(CreateRelationshipRequest.TARGET);
		return source != null && target != null && super.canExecute();
	}

}