/*******************************************************************************
 * Copyright (c) 2006-2012
 * Software Technology Group, Dresden University of Technology
 * DevBoost GmbH, Berlin, Amtsgericht Charlottenburg, HRB 140026
 * 
 * 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:
 *   Software Technology Group - TU Dresden, Germany;
 *   DevBoost GmbH - Berlin, Germany
 *      - initial API and implementation
 ******************************************************************************/
/*
 * Copyright (c) 2006, 2007 Borland Software Corporation
 * 
 * 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:
 *    Dmitry Stadnik (Borland) - initial API and implementation
 */
package org.reuseware.application.taipan.gmf.editor.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.ReorientReferenceRelationshipRequest;
import org.eclipse.gmf.runtime.emf.type.core.requests.ReorientRelationshipRequest;
import org.reuseware.application.taipan.Port;
import org.reuseware.application.taipan.Ship;
import org.reuseware.application.taipan.gmf.editor.edit.policies.TaiPanBaseItemSemanticEditPolicy;

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

	/**
	 * @generated
	 */
	private final int reorientDirection;

	/**
	 * @generated
	 */
	private final EObject referenceOwner;

	/**
	 * @generated
	 */
	private final EObject oldEnd;

	/**
	 * @generated
	 */
	private final EObject newEnd;

	/**
	 * @generated
	 */
	public PortRegisterReorientCommand(
			ReorientReferenceRelationshipRequest request) {
		super(request.getLabel(), null, request);
		reorientDirection = request.getDirection();
		referenceOwner = request.getReferenceOwner();
		oldEnd = request.getOldRelationshipEnd();
		newEnd = request.getNewRelationshipEnd();
	}

	/**
	 * @generated
	 */
	public boolean canExecute() {
		if (false == referenceOwner instanceof Port) {
			return false;
		}
		if (reorientDirection == ReorientRelationshipRequest.REORIENT_SOURCE) {
			return canReorientSource();
		}
		if (reorientDirection == ReorientRelationshipRequest.REORIENT_TARGET) {
			return canReorientTarget();
		}
		return false;
	}

	/**
	 * @generated
	 */
	protected boolean canReorientSource() {
		if (!(oldEnd instanceof Ship && newEnd instanceof Port)) {
			return false;
		}
		return TaiPanBaseItemSemanticEditPolicy.LinkConstraints
				.canExistPortRegister_4007(getNewSource(), getOldTarget());
	}

	/**
	 * @generated
	 */
	protected boolean canReorientTarget() {
		if (!(oldEnd instanceof Ship && newEnd instanceof Ship)) {
			return false;
		}
		return TaiPanBaseItemSemanticEditPolicy.LinkConstraints
				.canExistPortRegister_4007(getOldSource(), getNewTarget());
	}

	/**
	 * @generated
	 */
	protected CommandResult doExecuteWithResult(IProgressMonitor monitor,
			IAdaptable info) throws ExecutionException {
		if (!canExecute()) {
			throw new ExecutionException(
					"Invalid arguments in reorient link command"); //$NON-NLS-1$
		}
		if (reorientDirection == ReorientRelationshipRequest.REORIENT_SOURCE) {
			return reorientSource();
		}
		if (reorientDirection == ReorientRelationshipRequest.REORIENT_TARGET) {
			return reorientTarget();
		}
		throw new IllegalStateException();
	}

	/**
	 * @generated
	 */
	protected CommandResult reorientSource() throws ExecutionException {
		getOldSource().getRegister().remove(getOldTarget());
		getNewSource().getRegister().add(getOldTarget());
		return CommandResult.newOKCommandResult(referenceOwner);
	}

	/**
	 * @generated
	 */
	protected CommandResult reorientTarget() throws ExecutionException {
		getOldSource().getRegister().remove(getOldTarget());
		getOldSource().getRegister().add(getNewTarget());
		return CommandResult.newOKCommandResult(referenceOwner);
	}

	/**
	 * @generated
	 */
	protected Port getOldSource() {
		return (Port) referenceOwner;
	}

	/**
	 * @generated
	 */
	protected Port getNewSource() {
		return (Port) newEnd;
	}

	/**
	 * @generated
	 */
	protected Ship getOldTarget() {
		return (Ship) oldEnd;
	}

	/**
	 * @generated
	 */
	protected Ship getNewTarget() {
		return (Ship) newEnd;
	}
}