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/*****************************************************************************
* Copyright (c) 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:
*
* Yann Tanguy (CEA LIST) yann.tanguy@cea.fr - Initial API and implementation
*
*****************************************************************************/
package org.eclipse.papyrus.sysml.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.CompositeCommand;
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.MoveRequest;
import org.eclipse.gmf.runtime.emf.type.core.requests.ReorientRelationshipRequest;
import org.eclipse.gmf.runtime.emf.type.core.requests.ReorientRequest;
import org.eclipse.papyrus.infra.services.edit.service.ElementEditServiceUtils;
import org.eclipse.papyrus.infra.services.edit.service.IElementEditService;
import org.eclipse.papyrus.sysml.service.types.element.SysMLElementTypes;
import org.eclipse.papyrus.uml.service.types.utils.ElementUtil;
import org.eclipse.papyrus.uml.service.types.utils.RequestParameterConstants;
import org.eclipse.uml2.uml.Association;
import org.eclipse.uml2.uml.Classifier;
import org.eclipse.uml2.uml.Port;
import org.eclipse.uml2.uml.Property;
import org.eclipse.uml2.uml.UMLPackage;
/**
* <pre>
* This HelperAdvice completes {@link Classifier} edit commands with :
* - possibly required (sysML) association re-factor command.
* </pre>
*/
public class ClassifierEditHelperAdvice extends AbstractEditHelperAdvice {
/**
* <pre>
* {@inheritDoc}
*
* While moving a {@link Property} to a Classifier:
* - add possibly required (sysML) association re-factor command when needed.
*
* </pre>
*/
@Override
protected ICommand getBeforeMoveCommand(MoveRequest request) {
ICommand gmfCommand = super.getBeforeMoveCommand(request);
// Treat related associations that required a re-factor action
// Retrieve elements already under re-factor.
List<EObject> currentlyRefactoredElements = (request.getParameter(org.eclipse.papyrus.infra.services.edit.utils.RequestParameterConstants.ASSOCIATION_REFACTORED_ELEMENTS) != null) ? (List<EObject>) request
.getParameter(org.eclipse.papyrus.infra.services.edit.utils.RequestParameterConstants.ASSOCIATION_REFACTORED_ELEMENTS) : new ArrayList<EObject>();
// Find Associations related to any moved Property
for (Object movedObject : request.getElementsToMove().keySet()) {
// Select Property (excluding Port) in the list of moved elements
if (!(movedObject instanceof Property) || (movedObject instanceof Port)) {
continue;
}
Property movedProperty = (Property) movedObject;
Association relatedAssociation = movedProperty.getAssociation();
// The moved property has to be related to a SysML association
if ((relatedAssociation == null) || !(ElementUtil.hasNature(relatedAssociation, SysMLElementTypes.SYSML_NATURE))) {
continue;
}
// Make sure the target differs from current container
if ((movedProperty.eContainer() == request.getTargetContainer()) && (movedProperty.eContainingFeature() == request.getTargetFeature(movedProperty))) {
continue;
}
// Make sure the target differs from related association (this move does not imply a re-factor, but simply an ownership change of an association end)
if ((relatedAssociation == request.getTargetContainer()) && ((request.getTargetFeature(movedProperty) == null) || (UMLPackage.eINSTANCE.getAssociation_OwnedEnd() == request.getTargetFeature(movedProperty)))) {
continue; // This is a SysML Property#isNavigable update which does not require an Association refactoring action
}
if ((getOppositeAssociationEnd(movedProperty).getType() == request.getTargetContainer())) {
continue; // This is a SysML Property#isNavigable update which does not require an Association refactoring action
}
// Moved element already under re-factor ?
if (currentlyRefactoredElements.contains(movedObject) || currentlyRefactoredElements.contains(relatedAssociation)) {
continue;
} else {
currentlyRefactoredElements.add((EObject) movedObject);
request.getParameters().put(org.eclipse.papyrus.infra.services.edit.utils.RequestParameterConstants.ASSOCIATION_REFACTORED_ELEMENTS, currentlyRefactoredElements);
}
ICommand refactorCommand = getAssociationRefactoringCommand(movedProperty, relatedAssociation, request);
gmfCommand = CompositeCommand.compose(gmfCommand, refactorCommand);
}
if (gmfCommand != null) {
gmfCommand = gmfCommand.reduce();
}
return gmfCommand;
}
/**
* Create a re-factoring command related to a Property move.
*
* @param movedProperty
* the moved property
* @param associationToRefactor
* the association to re-factor (re-orient action)
* @param request
* the original move request
* @return the re-factoring command
*/
private ICommand getAssociationRefactoringCommand(Property movedProperty, Association associationToRefactor, MoveRequest request) {
Association relatedAssociation = movedProperty.getAssociation(); // Should not be null, test before calling method.
// Re-orient the related association (do not use edit service to avoid infinite loop here)
int direction = ReorientRequest.REORIENT_TARGET;
if (movedProperty == associationToRefactor.getMemberEnds().get(0)) {
direction = ReorientRequest.REORIENT_SOURCE;
}
ReorientRelationshipRequest reorientRequest = new ReorientRelationshipRequest(relatedAssociation, request.getTargetContainer(), movedProperty.eContainer(), direction);
reorientRequest.addParameters(request.getParameters());
IElementEditService provider = ElementEditServiceUtils.getCommandProvider(relatedAssociation);
if (provider != null) {
return provider.getEditCommand(reorientRequest);
}
return null;
}
/**
* Get the opposite end of an AssociationEnd (binary association assumed).
*
* @param associationEnd
* the association end
* @return the opposite association end or null
*/
private Property getOppositeAssociationEnd(Property associationEnd) {
Property oppositeEnd = null;
if (associationEnd.getAssociation() != null) {
Association association = associationEnd.getAssociation();
Set<Property> ends = new HashSet<Property>();
ends.addAll(association.getMemberEnds());
ends.remove(associationEnd);
oppositeEnd = (ends.size() > 0) ? ends.iterator().next() : null;
}
return oppositeEnd;
}
}
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