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/*****************************************************************************
* Copyright (c) 2010 CEA
*
*
* 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:
* Soyatec - Initial API and implementation
*
*****************************************************************************/
package org.eclipse.papyrus.uml.diagram.sequence;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.EStructuralFeature;
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.SetRequest;
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.Comment;
import org.eclipse.uml2.uml.Constraint;
import org.eclipse.uml2.uml.DurationObservation;
import org.eclipse.uml2.uml.Element;
import org.eclipse.uml2.uml.TimeObservation;
import org.eclipse.uml2.uml.UMLPackage;
/**
* @author Jin Liu (jin.liu@soyatec.com)
*/
public class SequenceViewDependentsAdvice extends AbstractEditHelperAdvice {
@SuppressWarnings("rawtypes")
@Override
protected ICommand getBeforeSetCommand(SetRequest request) {
EObject element = request.getElementToEdit();
View view = findView(element);
if (view != null) {
// Clear edge's when the UML model has been changed.
EStructuralFeature feature = request.getFeature();
Object value = request.getValue();
if (!(value instanceof List<?>)) {
return null;
}
List<Edge> destroyEdges = new ArrayList<Edge>();
List<Element> targetObjects = new ArrayList<Element>();
if (element instanceof Comment && UMLPackage.Literals.COMMENT__ANNOTATED_ELEMENT == feature) {
targetObjects.addAll(((Comment) element).getAnnotatedElements());
} else if (element instanceof DurationObservation && UMLPackage.Literals.DURATION_OBSERVATION__EVENT == feature) {
targetObjects.addAll(((DurationObservation) element).getEvents());
} else if (element instanceof TimeObservation && UMLPackage.Literals.TIME_OBSERVATION__EVENT == feature) {
targetObjects.add(((TimeObservation) element).getEvent());
} else if (element instanceof Constraint && UMLPackage.Literals.CONSTRAINT__CONSTRAINED_ELEMENT == feature) {
targetObjects.addAll(((Constraint) element).getConstrainedElements());
}
for (Element object : targetObjects) {
if (value instanceof List && ((List) value).contains(object)) {
continue;
}
View target = findView(object);
List sourceConnections = ViewUtil.getSourceConnections(view);
for (Object connector : sourceConnections) {
if (!(connector instanceof Edge)) {
continue;
}
Edge edge = (Edge) connector;
if (target == edge.getTarget()) {
destroyEdges.add(edge);
}
}
}
if (!destroyEdges.isEmpty()) {
TransactionalEditingDomain editingDomain = request.getEditingDomain();
CompositeCommand command = new CompositeCommand("Clear Connectors");
for (Edge edge : destroyEdges) {
DestroyElementRequest destroy = new DestroyElementRequest(editingDomain, edge, 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 super.getBeforeSetCommand(request);
}
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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