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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.sequence.command;
import java.util.Collection;
import java.util.List;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.EStructuralFeature.Setting;
import org.eclipse.gmf.runtime.diagram.core.util.ViewUtil;
import org.eclipse.gmf.runtime.emf.type.core.requests.CreateRelationshipRequest;
import org.eclipse.gmf.runtime.notation.Edge;
import org.eclipse.gmf.runtime.notation.NotationPackage;
import org.eclipse.gmf.runtime.notation.View;
import org.eclipse.papyrus.uml.diagram.sequence.edit.commands.ContextLinkCreateCommand;
import org.eclipse.papyrus.uml.diagram.sequence.edit.parts.ContextLinkEditPart;
import org.eclipse.papyrus.uml.diagram.sequence.providers.UMLElementTypes;
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;
/**
* use to construct the instance specification link between two instance
*
*/
public class CustomContextLinkCreateCommand extends ContextLinkCreateCommand {
public CustomContextLinkCreateCommand(CreateRelationshipRequest request, EObject source, EObject target) {
super(request, source, target);
}
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;
}
@Override
public boolean canExecute() {
if(source == null && target == null) {
return false;
}
if(source != null && false == source instanceof Constraint) {
return false;
}
if(target != null && false == target instanceof Namespace) {
return false;
}
if(getSource() == null) {
return true; // link creation is in progress; source is not defined yet
}
if(getSource() != null) {
if(getSource().getContext() != null && target != null) {
if(getSource() instanceof Constraint) {
View viewConstraint = findView((Constraint)getSource());
List sourceConnections = ViewUtil.getSourceConnections(viewConstraint); //get all outgoing connections from constraint view
for(Object connector : sourceConnections) {
if(!(connector instanceof Edge)) {
continue;
}
Edge edge = (Edge)connector;
EObject targetElem = edge.getTarget().getElement();
if(targetElem instanceof Namespace) {
if(("" + ContextLinkEditPart.VISUAL_ID).equals(edge.getType()))
return false; //case of the connector representing a context link
}
}
}
}
}
if(getTarget() != null && (getTarget().getOwnedRules().contains(getTarget()))) {
return false;
}
return true;
}
}
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