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/*****************************************************************************
* Copyright (c) 2013 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:
* Boutheina Bannour (CEA LIST) boutheina.bannour@cea.fr - Initial API and implementation
*
*****************************************************************************/
package org.eclipse.papyrus.uml.diagram.clazz.custom.helper.advice;
import java.util.Collection;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.EStructuralFeature.Setting;
import org.eclipse.emf.transaction.TransactionalEditingDomain;
import org.eclipse.gmf.runtime.common.core.command.CompositeCommand;
import org.eclipse.gmf.runtime.common.core.command.ICommand;
import org.eclipse.gmf.runtime.diagram.core.util.ViewUtil;
import org.eclipse.gmf.runtime.emf.type.core.ElementTypeRegistry;
import org.eclipse.gmf.runtime.emf.type.core.IElementType;
import org.eclipse.gmf.runtime.emf.type.core.edithelper.AbstractEditHelperAdvice;
import org.eclipse.gmf.runtime.emf.type.core.requests.DestroyElementRequest;
import org.eclipse.gmf.runtime.emf.type.core.requests.MoveRequest;
import org.eclipse.gmf.runtime.notation.Edge;
import org.eclipse.gmf.runtime.notation.NotationPackage;
import org.eclipse.gmf.runtime.notation.View;
import org.eclipse.uml2.common.util.CacheAdapter;
import org.eclipse.uml2.uml.Constraint;
import org.eclipse.uml2.uml.Namespace;
import org.eclipse.uml2.uml.UMLPackage;
/**
* <pre>
* This HelperAdvice completes {@ownedRule Namespace} edit commands with diagram specific
* commands in order to remove context link
* in case a {@ownedRule Namespace} is modified.
* </pre>
*/
public class NamespaceHelperAdvice extends AbstractEditHelperAdvice {
@Override
protected ICommand getAfterMoveCommand(MoveRequest request) {
EObject element = request.getTargetContainer();
if (element instanceof Namespace) {
// EStructuralFeature feature = request.getTargetFeature(element);
Map<?, ?> elemsToMove = request.getElementsToMove();
Edge edgeToDestroy = null;
for (Iterator<?> value = elemsToMove.keySet().iterator(); value.hasNext();) {
Object object = (Object) value.next();
if (object instanceof Constraint) {
if (UMLPackage.eINSTANCE.getNamespace_OwnedRule().equals(elemsToMove.get(object))) {
View viewConstraint = findView((Constraint) object);
List<?> sourceConnections = ViewUtil.getSourceConnections(viewConstraint);
for (Object connector : sourceConnections) {
if (!(connector instanceof Edge)) {
continue;
}
Edge edge = (Edge) connector;
EObject targetElem = edge.getTarget().getElement();
if (targetElem instanceof Namespace) {
if (((Namespace) targetElem).getOwnedRules().contains((Constraint) object)) {
edgeToDestroy = edge;
break;
}
}
}
}
}
}
if (edgeToDestroy != null) {
TransactionalEditingDomain editingDomain = request.getEditingDomain();
CompositeCommand command = new CompositeCommand("Clear owned rule link");
DestroyElementRequest destroy = new DestroyElementRequest(editingDomain, edgeToDestroy, false);
Object eHelperContext = destroy.getEditHelperContext();
IElementType context = ElementTypeRegistry.getInstance().getElementType(eHelperContext);
if (context != null) {
ICommand result = context.getEditCommand(destroy);
if (result != null) {
command.add(result);
}
}
return command;
}
}
return null;
}
private View findView(EObject element) {
if (element == null) {
return null;
}
Collection<Setting> settings = CacheAdapter.getInstance().getNonNavigableInverseReferences(element);
for (Setting ref : settings) {
if (NotationPackage.eINSTANCE.getView_Element().equals(ref.getEStructuralFeature())) {
View view = (View) ref.getEObject();
if (view != null) {
return view;
}
}
}
return null;
}
}
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