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/*****************************************************************************
* Copyright (c) 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
* Mathieu Velten (Atos Origin) mathieu.velten@atosorigin.com - remove linked messages too
*
*****************************************************************************/
package org.eclipse.papyrus.uml.service.types.helper.advice;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.gmf.runtime.common.core.command.ICommand;
import org.eclipse.gmf.runtime.emf.type.core.edithelper.AbstractEditHelperAdvice;
import org.eclipse.gmf.runtime.emf.type.core.requests.DestroyDependentsRequest;
import org.eclipse.papyrus.infra.emf.utils.EMFHelper;
import org.eclipse.papyrus.uml.diagram.common.helper.InteractionFragmentHelper;
import org.eclipse.uml2.uml.ExecutionSpecification;
import org.eclipse.uml2.uml.InteractionFragment;
import org.eclipse.uml2.uml.Lifeline;
import org.eclipse.uml2.uml.Message;
import org.eclipse.uml2.uml.MessageOccurrenceSpecification;
import org.eclipse.uml2.uml.MessageSort;
import org.eclipse.uml2.uml.OccurrenceSpecification;
/**
* Helper advice for all {@link ExecutionSpecification} elements.
*/
public class ExecutionSpecificationHelperAdvice extends AbstractEditHelperAdvice {
/**
* <pre>
* Add a command to associated {@link OccurrenceSpecification} and {@link Message}.
* This command is only added if the start - finish referenced {@link OccurrenceSpecification} is not
* referenced by another element.
* </pre>
*
* @see org.eclipse.gmf.runtime.emf.type.core.edithelper.AbstractEditHelperAdvice#getBeforeDestroyDependentsCommand(org.eclipse.gmf.runtime.emf.type.core.requests.DestroyDependentsRequest)
*
* @param request
* the request
* @return the command to execute before the edit helper work is done
*/
@Override
protected ICommand getBeforeDestroyDependentsCommand(DestroyDependentsRequest request) {
List<EObject> dependentsToDestroy = new ArrayList<EObject>();
ExecutionSpecification es = (ExecutionSpecification)request.getElementToDestroy();
// Add start - finish referenced OccurrenceSpecification to the dependents list
// if they are not used by another element.
OccurrenceSpecification osStart = es.getStart();
if((osStart != null) && (EMFHelper.isOnlyUsage(osStart, es))) {
dependentsToDestroy.add(osStart);
}
OccurrenceSpecification osFinish = es.getFinish();
if((osFinish != null) && (EMFHelper.isOnlyUsage(osFinish, es))) {
dependentsToDestroy.add(osFinish);
}
Set<Lifeline> coveredLifelines = new HashSet<Lifeline>(es.getCovereds());
// find initiating MOS of a synch message
InteractionFragment previousIft = InteractionFragmentHelper.findPreviousFragment(osStart, es.getOwner());
while(previousIft != null) {
// keep the first ift with the same lifelines, and check it
if(coveredLifelines.equals(new HashSet<Lifeline>(previousIft.getCovereds()))) {
if(previousIft instanceof MessageOccurrenceSpecification) {
Message msg = ((MessageOccurrenceSpecification)previousIft).getMessage();
if(msg != null && MessageSort.SYNCH_CALL_LITERAL.equals(msg.getMessageSort())) {
dependentsToDestroy.add(previousIft);
}
}
break;
}
previousIft = InteractionFragmentHelper.findPreviousFragment(previousIft, es.getOwner());
}
// find MOS between the start and finish
InteractionFragment fragment = osStart;
while(fragment != null && !fragment.equals(osFinish)) {
// remove MOS if it have the same covered lifelines as the ES
if(fragment instanceof MessageOccurrenceSpecification && coveredLifelines.equals(new HashSet<Lifeline>(fragment.getCovereds()))) {
dependentsToDestroy.add(fragment);
}
fragment = InteractionFragmentHelper.findNextFragment(fragment, es.getOwner());
}
// return command to destroy dependents
if(!dependentsToDestroy.isEmpty()) {
return request.getDestroyDependentsCommand(dependentsToDestroy);
}
return null;
}
}
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