/*****************************************************************************
 * Copyright (c) 2009 Atos Origin.
 *
 *    
 * 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:
 *  Emilien Perico (Atos Origin) emilien.perico@atosorigin.com - Initial API and implementation
 *
 *****************************************************************************/
package org.eclipse.papyrus.uml.diagram.usecase.edit.commands;

import org.eclipse.core.commands.ExecutionException;
import org.eclipse.core.runtime.IAdaptable;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.gmf.runtime.common.core.command.CommandResult;
import org.eclipse.gmf.runtime.emf.type.core.commands.EditElementCommand;
import org.eclipse.gmf.runtime.emf.type.core.requests.CreateRelationshipRequest;
import org.eclipse.papyrus.uml.diagram.usecase.edit.policies.UMLBaseItemSemanticEditPolicy;
import org.eclipse.uml2.uml.Comment;
import org.eclipse.uml2.uml.Element;

/**
 * @generated
 */
public class CommentAnnotatedElementCreateCommand extends EditElementCommand {

	/**
	 * @generated
	 */
	protected final EObject source;

	/**
	 * @generated
	 */
	protected final EObject target;

	/**
	 * @generated
	 */
	public CommentAnnotatedElementCreateCommand(CreateRelationshipRequest request, EObject source, EObject target) {
		super(request.getLabel(), null, request);
		this.source = source;
		this.target = target;
	}

	/**
	 * @generated
	 */
	public boolean canExecute() {
		if(source == null && target == null) {
			return false;
		}
		if(source != null && false == source instanceof Comment) {
			return false;
		}
		if(target != null && false == target instanceof Element) {
			return false;
		}
		if(getSource() == null) {
			return true; // link creation is in progress; source is not defined yet
		}
		// target may be null here but it's possible to check constraint
		return UMLBaseItemSemanticEditPolicy.getLinkConstraints().canCreateCommentAnnotatedElement_4014(getSource(), getTarget());
	}

	/**
	 * @generated
	 */
	protected CommandResult doExecuteWithResult(IProgressMonitor monitor, IAdaptable info) throws ExecutionException {
		if(!canExecute()) {
			throw new ExecutionException("Invalid arguments in create link command"); //$NON-NLS-1$
		}
		if(getSource() != null && getTarget() != null) {
			getSource().getAnnotatedElements().add(getTarget());
		}
		return CommandResult.newOKCommandResult();
	}

	/**
	 * @generated
	 */
	protected void setElementToEdit(EObject element) {
		throw new UnsupportedOperationException();
	}

	/**
	 * @generated
	 */
	protected Comment getSource() {
		return (Comment)source;
	}

	/**
	 * @generated
	 */
	protected Element getTarget() {
		return (Element)target;
	}
}