/*
* Copyright (c) 2012-2016 Marsha Chechik, Alessio Di Sandro, Michalis Famelis,
* Rick Salay.
* 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:
* Alessio Di Sandro - Implementation.
*/
package edu.toronto.cs.se.mmint.mid.diagram.edit.policies;
import java.util.Iterator;
import org.eclipse.emf.ecore.EAnnotation;
import org.eclipse.gef.commands.Command;
import org.eclipse.gef.commands.UnexecutableCommand;
import org.eclipse.gmf.runtime.diagram.core.commands.DeleteCommand;
import org.eclipse.gmf.runtime.emf.commands.core.command.CompositeTransactionalCommand;
import org.eclipse.gmf.runtime.emf.type.core.requests.CreateRelationshipRequest;
import org.eclipse.gmf.runtime.emf.type.core.requests.DestroyElementRequest;
import org.eclipse.gmf.runtime.emf.type.core.requests.ReorientReferenceRelationshipRequest;
import org.eclipse.gmf.runtime.emf.type.core.requests.ReorientRelationshipRequest;
import org.eclipse.gmf.runtime.notation.Edge;
import org.eclipse.gmf.runtime.notation.View;
import edu.toronto.cs.se.mmint.mid.diagram.edit.commands.BinaryModelRelChangeModelEndpointCommand;
import edu.toronto.cs.se.mmint.mid.diagram.edit.commands.BinaryModelRelNewBinaryRelCommand;
import edu.toronto.cs.se.mmint.mid.diagram.edit.commands.ModelRelAddModelEndpointCommand;
import edu.toronto.cs.se.mmint.mid.diagram.edit.commands.ModelRelChangeModelEndpointCommand;
import edu.toronto.cs.se.mmint.mid.diagram.edit.commands.ModelRelDelCommand;
import edu.toronto.cs.se.mmint.mid.diagram.edit.parts.BinaryModelRelEditPart;
import edu.toronto.cs.se.mmint.mid.diagram.edit.parts.ExtendibleElementSupertypeEditPart;
import edu.toronto.cs.se.mmint.mid.diagram.edit.parts.ModelEndpoint2EditPart;
import edu.toronto.cs.se.mmint.mid.diagram.edit.parts.ModelEndpoint3EditPart;
import edu.toronto.cs.se.mmint.mid.diagram.edit.parts.ModelEndpointEditPart;
import edu.toronto.cs.se.mmint.mid.diagram.part.MIDVisualIDRegistry;
import edu.toronto.cs.se.mmint.mid.diagram.providers.MIDElementTypes;
/**
* The semantic edit policy for created model relationships.
*
* @author Alessio Di Sandro
*
*/
public class ModelRelCreatedSemanticEditPolicy extends ModelRelItemSemanticEditPolicy {
/**
* Gets the command to destroy a model relationship.
*
* @param req
* The request.
* @return The executable command.
*/
@Override
protected Command getDestroyElementCommand(DestroyElementRequest req) {
View view = (View) getHost().getModel();
CompositeTransactionalCommand cmd = new CompositeTransactionalCommand(
getEditingDomain(), null);
cmd.setTransactionNestingEnabled(true);
for (Iterator<?> it = view.getTargetEdges().iterator(); it.hasNext();) {
Edge incomingLink = (Edge) it.next();
if (MIDVisualIDRegistry.getVisualID(incomingLink) == ExtendibleElementSupertypeEditPart.VISUAL_ID) {
cmd.add(new DeleteCommand(getEditingDomain(), incomingLink));
continue;
}
if (MIDVisualIDRegistry.getVisualID(incomingLink) == ModelEndpointEditPart.VISUAL_ID) {
cmd.add(new DeleteCommand(getEditingDomain(), incomingLink));
continue;
}
if (MIDVisualIDRegistry.getVisualID(incomingLink) == BinaryModelRelEditPart.VISUAL_ID) {
cmd.add(new DeleteCommand(getEditingDomain(), incomingLink));
continue;
}
if (MIDVisualIDRegistry.getVisualID(incomingLink) == ModelEndpoint2EditPart.VISUAL_ID) {
cmd.add(new DeleteCommand(getEditingDomain(), incomingLink));
continue;
}
if (MIDVisualIDRegistry.getVisualID(incomingLink) == ModelEndpoint3EditPart.VISUAL_ID) {
cmd.add(new DeleteCommand(getEditingDomain(), incomingLink));
continue;
}
}
for (Iterator<?> it = view.getSourceEdges().iterator(); it.hasNext();) {
Edge outgoingLink = (Edge) it.next();
if (MIDVisualIDRegistry.getVisualID(outgoingLink) == ExtendibleElementSupertypeEditPart.VISUAL_ID) {
cmd.add(new DeleteCommand(getEditingDomain(), outgoingLink));
continue;
}
if (MIDVisualIDRegistry.getVisualID(outgoingLink) == ModelEndpointEditPart.VISUAL_ID) {
cmd.add(new DeleteCommand(getEditingDomain(), outgoingLink));
continue;
}
if (MIDVisualIDRegistry.getVisualID(outgoingLink) == BinaryModelRelEditPart.VISUAL_ID) {
cmd.add(new DeleteCommand(getEditingDomain(), outgoingLink));
continue;
}
}
EAnnotation annotation = view.getEAnnotation("Shortcut"); //$NON-NLS-1$
if (annotation == null) {
// there are indirectly referenced children, need extra commands: false
addDestroyShortcutsCommand(cmd, view);
// delete host element
cmd.add(new ModelRelDelCommand(req));
} else {
cmd.add(new DeleteCommand(getEditingDomain(), view));
}
return getGEFWrapper(cmd.reduce());
}
/**
* Gets the command to start creating a new link originating from a model
* relationship.
*
* @param req
* The request.
* @return The executable command.
*/
@Override
protected Command getStartCreateRelationshipCommand(CreateRelationshipRequest req) {
if (MIDElementTypes.ModelEndpoint_4002 == req.getElementType()) {
return getGEFWrapper(new ModelRelAddModelEndpointCommand(req,
req.getSource(), req.getTarget()));
}
if (MIDElementTypes.BinaryModelRel_4003 == req.getElementType()) {
return getGEFWrapper(new BinaryModelRelNewBinaryRelCommand(req,
req.getSource(), req.getTarget()));
}
return null;
}
/**
* Gets the command to complete the creation of a new link originating from
* a model relationship.
*
* @param req
* The request.
* @return The executable command.
*/
@Override
protected Command getCompleteCreateRelationshipCommand(CreateRelationshipRequest req) {
if (MIDElementTypes.ModelEndpoint_4002 == req.getElementType()) {
return getGEFWrapper(new ModelRelAddModelEndpointCommand(req,
req.getSource(), req.getTarget()));
}
if (MIDElementTypes.BinaryModelRel_4003 == req.getElementType()) {
return getGEFWrapper(new BinaryModelRelNewBinaryRelCommand(req,
req.getSource(), req.getTarget()));
}
return null;
}
/**
* Gets the command to reorient a link (implemented with an EClass)
* originating from a model relationship.
*
* @param req
* The request.
* @return The executable command.
*/
@Override
protected Command getReorientRelationshipCommand(ReorientRelationshipRequest req) {
switch (getVisualID(req)) {
case ModelEndpointEditPart.VISUAL_ID:
return getGEFWrapper(new ModelRelChangeModelEndpointCommand(req));
case BinaryModelRelEditPart.VISUAL_ID:
return getGEFWrapper(new BinaryModelRelChangeModelEndpointCommand(req));
}
return UnexecutableCommand.INSTANCE;
}
/**
* Gets the command to reorient a link (implemented with an EReference)
* originating from a model relationship.
*
* @param req
* The request.
* @return The executable command.
*/
@Override
protected Command getReorientReferenceRelationshipCommand(ReorientReferenceRelationshipRequest req) {
return UnexecutableCommand.INSTANCE;
}
}