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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:
* Vincent Lorenzo (CEA LIST) vincent.lorenzo@cea.fr - Initial API and implementation
*
*****************************************************************************/
package org.eclipse.papyrus.diagram.clazz.custom.helper.advice;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Set;
import org.eclipse.emf.common.util.EList;
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.gmf.runtime.emf.type.core.requests.ReorientRelationshipRequest;
import org.eclipse.gmf.runtime.notation.View;
import org.eclipse.papyrus.diagram.clazz.custom.utils.GeneralizationUtil;
import org.eclipse.papyrus.diagram.clazz.edit.parts.ModelEditPart;
import org.eclipse.papyrus.diagram.common.util.CrossReferencerUtil;
import org.eclipse.uml2.uml.Classifier;
import org.eclipse.uml2.uml.Generalization;
import org.eclipse.uml2.uml.NamedElement;
/**
* <pre>
* This HelperAdvice completes {@link Generalization} edit commands with diagram specific
* commands in order to remove inconsistent views (e.g. inherited Port or Property
* in case a {@link Generalization} is deleted or re-oriented.
* </pre>
*/
public class GeneralizationHelperAdvice extends AbstractEditHelperAdvice {
@Override
protected ICommand getBeforeReorientRelationshipCommand(ReorientRelationshipRequest request) {
// The list of member views becoming inconsistent after re-orient that should be deleted.
Set<View> viewsToDestroy = new HashSet<View>();
if(request.getRelationship() instanceof Generalization) {
viewsToDestroy.addAll(getMemberViewsToDestroy((Generalization)request.getRelationship()));
}
//return the command to destroy all these views
if(!viewsToDestroy.isEmpty()) {
DestroyDependentsRequest ddr = new DestroyDependentsRequest(request.getEditingDomain(), request.getRelationship(), false);
return ddr.getDestroyDependentsCommand(viewsToDestroy);
}
return null;
}
@Override
protected ICommand getBeforeDestroyDependentsCommand(DestroyDependentsRequest request) {
EObject destructee = request.getElementToDestroy();
Set<View> viewsToDestroy = new HashSet<View>();
if(destructee instanceof Generalization) {
viewsToDestroy = getMemberViewsToDestroy((Generalization)destructee);
}
//return the command to destroy all these views
if(!viewsToDestroy.isEmpty()) {
return request.getDestroyDependentsCommand(viewsToDestroy);
}
return null;
}
/**
* This methods looks for inconsistent views to delete in case the generalization is deleted or
* re-oriented.
*
* @param generalization
* the modified generalization
* @return the list of {@link View} to delete
*/
protected Set<View> getMemberViewsToDestroy(Generalization generalization) {
Set<View> viewsToDestroy = new HashSet<View>();
Classifier general = ((Generalization)generalization).getGeneral();
if(general != null) {
// Parse members
EList<NamedElement> members = general.getMembers();
for(NamedElement member : members) {
// Find Views in Composite Structure Diagram that are referencing current member
Iterator<View> viewIt = CrossReferencerUtil.getCrossReferencingViews(member, ModelEditPart.MODEL_ID).iterator();
while(viewIt.hasNext()) {
View view = (View)viewIt.next();
// Test if current view (member) is concerned by the deletion (re-orientation) of the generalization
GeneralizationUtil util = new GeneralizationUtil();
if(util.isConcernedByGeneralizationChanges(generalization, view)) {
viewsToDestroy.add(view);
}
}
}
}
return viewsToDestroy;
}
}
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