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/*****************************************************************************
* Copyright (c) 2010-2011 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.service.types.helper;
import org.eclipse.emf.common.util.EList;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.EReference;
import org.eclipse.gmf.runtime.common.core.command.ICommand;
import org.eclipse.gmf.runtime.emf.type.core.requests.DestroyElementRequest;
import org.eclipse.gmf.runtime.emf.type.core.requests.DestroyReferenceRequest;
import org.eclipse.gmf.runtime.emf.type.core.requests.ReorientRelationshipRequest;
import org.eclipse.gmf.runtime.emf.type.core.requests.SetRequest;
import org.eclipse.papyrus.infra.services.edit.service.ElementEditServiceUtils;
import org.eclipse.papyrus.infra.services.edit.service.IElementEditService;
import org.eclipse.papyrus.uml.service.types.command.DependencyReorientCommand;
import org.eclipse.uml2.uml.Dependency;
import org.eclipse.uml2.uml.NamedElement;
import org.eclipse.uml2.uml.UMLPackage;
/**
* This helper is used to set the source and the target for a {@link Dependency}
*/
public class DependencyEditHelper extends DirectedRelationshipEditHelper {
/**
* {@inheritDoc}
*/
@Override
protected EReference getSourceReference() {
return UMLPackage.eINSTANCE.getDependency_Client();
}
/**
* {@inheritDoc}
*/
@Override
protected EReference getTargetReference() {
return UMLPackage.eINSTANCE.getDependency_Supplier();
}
/**
* {@inheritDoc}
*/
@Override
protected boolean canCreate(EObject source, EObject target) {
if ((source != null) && !(source instanceof NamedElement)) {
return false;
}
if ((target != null) && !(target instanceof NamedElement)) {
return false;
}
return true;
}
/**
* {@inheritDoc}
*/
@Override
protected ICommand getReorientRelationshipCommand(ReorientRelationshipRequest req) {
return new DependencyReorientCommand(req);
}
/**
* {@inheritDoc}
*/
@Override
protected ICommand getDestroyReferenceCommand(DestroyReferenceRequest req) {
ICommand command = super.getDestroyReferenceCommand(req);
Dependency elementToEdit = (Dependency)req.getContainer();
IElementEditService provider = ElementEditServiceUtils.getCommandProvider(elementToEdit.eContainer());
if(provider == null) {
return command;
}
boolean shouldDestroyDependency = false;
if(getSourceReference().equals(req.getContainingFeature()) && (elementToEdit.getClients().size() == 1)) {
shouldDestroyDependency = true;
}
if(getTargetReference().equals(req.getContainingFeature()) && (elementToEdit.getSuppliers().size() == 1)) {
shouldDestroyDependency = true;
}
if(shouldDestroyDependency) {
DestroyElementRequest destroyRequest = new DestroyElementRequest(elementToEdit, false);
command = provider.getEditCommand(destroyRequest);
}
return command;
}
/**
* {@inheritDoc}
*/
@Override
protected ICommand getSetCommand(SetRequest req) {
// If sources or targets are set with an empty list, the dependency
// should be destroyed.
if(getSourceReference().equals(req.getFeature()) || getTargetReference().equals(req.getFeature())) {
Object values = req.getValue();
if((values != null) && (values instanceof EList) && ((EList<?>)values).isEmpty()) {
// Get dependency destroy command from Element Edit Service
IElementEditService provider = ElementEditServiceUtils.getCommandProvider(req.getElementToEdit());
if(provider != null) {
DestroyElementRequest destroyRequest = new DestroyElementRequest(req.getElementToEdit(), false);
ICommand destroyCommand = provider.getEditCommand(destroyRequest);
return destroyCommand;
}
}
}
return super.getSetCommand(req);
}
}
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