/*****************************************************************************
* Copyright (c) 2009-2010 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:
* Yann Tanguy (CEA LIST) yann.tanguy@cea.fr - Initial API and implementation
*
*****************************************************************************/
package org.eclipse.papyrus.uml.diagram.composite.custom.edit.policies;
import org.eclipse.gef.commands.Command;
import org.eclipse.gef.commands.UnexecutableCommand;
import org.eclipse.gmf.runtime.common.core.command.ICommand;
import org.eclipse.gmf.runtime.diagram.ui.commands.ICommandProxy;
import org.eclipse.gmf.runtime.diagram.ui.editparts.GraphicalEditPart;
import org.eclipse.gmf.runtime.emf.type.core.requests.DestroyElementRequest;
import org.eclipse.gmf.runtime.emf.type.core.requests.DestroyReferenceRequest;
import org.eclipse.papyrus.infra.services.edit.service.ElementEditServiceUtils;
import org.eclipse.papyrus.infra.services.edit.service.IElementEditService;
import org.eclipse.papyrus.uml.diagram.composite.edit.policies.CollaborationRoleItemSemanticEditPolicyCN;
import org.eclipse.uml2.uml.Collaboration;
import org.eclipse.uml2.uml.UMLPackage;
/**
* <pre>
* This class provides a custom edit policy used to replace the SEMANTIC_ROLE
* generated for the CollaborationUse element (when used in CompositeStructure Diagram)
* </pre>
*/
public class CollaborationRoleItemSemanticEditPolicy extends CollaborationRoleItemSemanticEditPolicyCN {
/**
* <pre>
* This method retrieves a Destroy Reference command instead of Destroy Element.
* </pre>
*
* @see org.eclipse.papyrus.uml.diagram.composite.edit.policies.CollaborationRoleItemSemanticEditPolicyCN#getDestroyElementCommand(org.eclipse.gmf.runtime.emf.type.core.requests.DestroyElementRequest)
*
* @param req
* the destroy element request
* @return the destroy element command
*/
@Override
protected Command getDestroyElementCommand(DestroyElementRequest req) {
GraphicalEditPart graphicalParent = (GraphicalEditPart)getHost().getParent();
Collaboration collaboration = (Collaboration)graphicalParent.resolveSemanticElement();
IElementEditService provider = ElementEditServiceUtils.getCommandProvider(collaboration);
if(provider != null) {
// Retrieve delete command from the Element Edit service
DestroyReferenceRequest setRequest = new DestroyReferenceRequest(collaboration, UMLPackage.eINSTANCE.getCollaboration_CollaborationRole(), req.getElementToDestroy(), false);
ICommand setCommand = provider.getEditCommand(setRequest);
if(setCommand != null) {
return new ICommandProxy(setCommand.reduce());
}
}
return UnexecutableCommand.INSTANCE;
}
}