/*
* Copyright (c) 2006, 2008 Borland Software Corp.
*
* 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:
* Alexander Shatalin (Borland) - initial API and implementation
*/
package org.eclipse.gmf.ecore.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.EClass;
import org.eclipse.emf.ecore.EClassifier;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.EReference;
import org.eclipse.gmf.ecore.edit.policies.EcoreBaseItemSemanticEditPolicy;
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;
/**
* @generated
*/
public class EReference2ReorientCommand extends EditElementCommand {
/**
* @generated
*/
private final int reorientDirection;
/**
* @generated
*/
private final EObject oldEnd;
/**
* @generated
*/
private final EObject newEnd;
/**
* @generated
*/
public EReference2ReorientCommand(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 EReference) {
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 EClass && newEnd instanceof EClass)) {
return false;
}
EClassifier target = getLink().getEType();
return EcoreBaseItemSemanticEditPolicy.getLinkConstraints().canExistEReference_4003(getLink(), getNewSource(), target);
}
/**
* @generated
*/
protected boolean canReorientTarget() {
if (!(oldEnd instanceof EClassifier && newEnd instanceof EClassifier)) {
return false;
}
if (!(getLink().eContainer() instanceof EClass)) {
return false;
}
EClass source = (EClass) getLink().eContainer();
return EcoreBaseItemSemanticEditPolicy.getLinkConstraints().canExistEReference_4003(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 {
getOldSource().getEStructuralFeatures().remove(getLink());
getNewSource().getEStructuralFeatures().add(getLink());
return CommandResult.newOKCommandResult(getLink());
}
/**
* @generated
*/
protected CommandResult reorientTarget() throws ExecutionException {
getLink().setEType(getNewTarget());
return CommandResult.newOKCommandResult(getLink());
}
/**
* @generated
*/
protected EReference getLink() {
return (EReference) getElementToEdit();
}
/**
* @generated
*/
protected EClass getOldSource() {
return (EClass) oldEnd;
}
/**
* @generated
*/
protected EClass getNewSource() {
return (EClass) newEnd;
}
/**
* @generated
*/
protected EClassifier getOldTarget() {
return (EClassifier) oldEnd;
}
/**
* @generated
*/
protected EClassifier getNewTarget() {
return (EClassifier) newEnd;
}
}