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/*
 * Copyright (c) 2014 CEA LIST.
 * 
 * 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:
 *  Vincent Lorenzo (CEA LIST) vincent.lorenzo@cea.fr - Initial API and implementation
 * 
 * 
 */
package org.eclipse.papyrus.uml.diagram.profile.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.ReorientRelationshipRequest;
import org.eclipse.papyrus.uml.diagram.profile.edit.policies.UMLBaseItemSemanticEditPolicy;
import org.eclipse.uml2.uml.ElementImport;
import org.eclipse.uml2.uml.Namespace;
import org.eclipse.uml2.uml.PackageableElement;

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

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

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

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

	/**
	 * @generated
	 */
	public ElementImportReorientCommand(ReorientRelationshipRequest request) {
		super(request.getLabel(), request.getRelationship(), request);
		reorientDirection = request.getDirection();
		oldEnd = request.getOldRelationshipEnd();
		newEnd = request.getNewRelationshipEnd();
	}

	/**
	 * @generated
	 */
	public boolean canExecute() {
		if(false == getElementToEdit() instanceof ElementImport) {
			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 Namespace && newEnd instanceof Namespace)) {
			return false;
		}
		PackageableElement target = getLink().getImportedElement();
		if(!(getLink().eContainer() instanceof Namespace)) {
			return false;
		}
		Namespace container = (Namespace)getLink().eContainer();
		return UMLBaseItemSemanticEditPolicy.getLinkConstraints().canExistElementImport_1064(container, getLink(), getNewSource(), target);
	}

	/**
	 * @generated
	 */
	protected boolean canReorientTarget() {
		if(!(oldEnd instanceof PackageableElement && newEnd instanceof PackageableElement)) {
			return false;
		}
		Namespace source = getLink().getImportingNamespace();
		if(!(getLink().eContainer() instanceof Namespace)) {
			return false;
		}
		Namespace container = (Namespace)getLink().eContainer();
		return UMLBaseItemSemanticEditPolicy.getLinkConstraints().canExistElementImport_1064(container, getLink(), source, 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 {
		getLink().setImportingNamespace(getNewSource());
		return CommandResult.newOKCommandResult(getLink());
	}

	/**
	 * @generated
	 */
	protected CommandResult reorientTarget() throws ExecutionException {
		getLink().setImportedElement(getNewTarget());
		return CommandResult.newOKCommandResult(getLink());
	}

	/**
	 * @generated
	 */
	protected ElementImport getLink() {
		return (ElementImport)getElementToEdit();
	}

	/**
	 * @generated
	 */
	protected Namespace getOldSource() {
		return (Namespace)oldEnd;
	}

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

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

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

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