/**
* 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.relationship.diagram.edit.commands;
import java.util.List;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.gmf.runtime.common.core.command.CommandResult;
import org.eclipse.gmf.runtime.emf.type.core.requests.ReorientRelationshipRequest;
import edu.toronto.cs.se.mmint.MMINTException;
import edu.toronto.cs.se.mmint.MIDTypeHierarchy;
import edu.toronto.cs.se.mmint.mid.reasoning.MIDConstraintChecker;
import edu.toronto.cs.se.mmint.mid.relationship.BinaryMappingReference;
import edu.toronto.cs.se.mmint.mid.relationship.ModelElementEndpoint;
import edu.toronto.cs.se.mmint.mid.relationship.ModelElementEndpointReference;
import edu.toronto.cs.se.mmint.mid.relationship.ModelElementReference;
import edu.toronto.cs.se.mmint.mid.ui.MIDDialogs;
import edu.toronto.cs.se.mmint.mid.ui.MIDDialogCancellation;
/**
* The command to change a model element reference of a binary mapping link.
*
* @author Alessio Di Sandro
*
*/
public class BinaryMappingReferenceChangeModelElementReferenceCommand extends BinaryMappingReferenceReorientCommand {
private List<String> modelElemTypeEndpointUris;
/**
* Constructor: initialises the superclass.
*
* @param request
* The request.
*/
public BinaryMappingReferenceChangeModelElementReferenceCommand(ReorientRelationshipRequest request) {
super(request);
modelElemTypeEndpointUris = null;
}
/**
* Checks if a model element reference can be changed.
*
* @return True if a model element reference can be changed, false
* otherwise.
*/
@Override
public boolean canExecute() {
BinaryMappingReference mappingRef = getLink();
return super.canExecute() && (
mappingRef.isInstancesLevel() ||
(mappingRef.isTypesLevel() && !MIDTypeHierarchy.isRootType(mappingRef.getObject()))
);
}
/**
* Checks if the source model element reference can be reoriented.
*
* @return True if the source model element reference can be reoriented,
* false otherwise.
*/
@Override
protected boolean canReorientSource() {
BinaryMappingReference mappingRef = getLink();
return
super.canReorientSource() && ((
mappingRef.isInstancesLevel() &&
(modelElemTypeEndpointUris = MIDConstraintChecker.getAllowedModelElementEndpointReferences(mappingRef, mappingRef.getModelElemEndpointRefs().get(0), getNewSource())) != null
) || (
mappingRef.isTypesLevel() &&
MIDConstraintChecker.isAllowedModelElementTypeEndpointReference(mappingRef, getNewSource(), null)
));
}
/**
* Checks if the target model element reference can be reoriented.
*
* @return True if the target model element reference can be reoriented,
* false otherwise.
*/
@Override
protected boolean canReorientTarget() {
BinaryMappingReference mappingRef = getLink();
return
super.canReorientTarget() && ((
mappingRef.isInstancesLevel() &&
(modelElemTypeEndpointUris = MIDConstraintChecker.getAllowedModelElementEndpointReferences(mappingRef, mappingRef.getModelElemEndpointRefs().get(1), getNewTarget())) != null
) || (
mappingRef.isTypesLevel() &&
MIDConstraintChecker.isAllowedModelElementTypeEndpointReference(mappingRef, null, getNewTarget())
));
}
protected void doExecuteTypesLevel(BinaryMappingReference containerMappingTypeRef, ModelElementReference targetModelElemTypeRef, boolean isBinarySrc) throws MMINTException, MIDDialogCancellation {
boolean wasOverriding = false;
ModelElementEndpointReference oldModelElemTypeEndpointRef = null;
if (containerMappingTypeRef.getModelElemEndpointRefs().size() == 2) {
oldModelElemTypeEndpointRef = (isBinarySrc) ?
containerMappingTypeRef.getModelElemEndpointRefs().get(0) :
containerMappingTypeRef.getModelElemEndpointRefs().get(1);
wasOverriding = true;
}
else if (containerMappingTypeRef.getModelElemEndpointRefs().size() == 1) {
ModelElementEndpointReference singleModelElemTypeEndpointRef = containerMappingTypeRef.getModelElemEndpointRefs().get(0);
wasOverriding = (isBinarySrc) ?
(containerMappingTypeRef.getSourceModelElemRef() == singleModelElemTypeEndpointRef.getModelElemRef()) :
(containerMappingTypeRef.getTargetModelElemRef() == singleModelElemTypeEndpointRef.getModelElemRef());
if (wasOverriding) {
oldModelElemTypeEndpointRef = singleModelElemTypeEndpointRef;
}
}
ModelElementEndpoint modelElemTypeEndpoint = MIDTypeHierarchy.getOverriddenModelElementTypeEndpoint(containerMappingTypeRef, targetModelElemTypeRef);
if (modelElemTypeEndpoint == null) {
if (wasOverriding) { // was overriding, becomes non-overriding
oldModelElemTypeEndpointRef.deleteTypeAndReference(true);
}
// was overriding, becomes non-overriding
// was non-overriding, remains non-overriding
containerMappingTypeRef.addModelElementTypeReference(targetModelElemTypeRef, isBinarySrc);
}
else {
if (wasOverriding) { // was overriding, remains overriding
modelElemTypeEndpoint.replaceSubtypeAndReference(oldModelElemTypeEndpointRef, oldModelElemTypeEndpointRef.getObject().getName(), targetModelElemTypeRef);
}
else { // was non-overriding, becomes overriding
String detail = (isBinarySrc) ? "source" : "target";
String newModelElemTypeEndpointName = MIDDialogs.getStringInput("Create new " + detail + " model element type endpoint", "Insert new " + detail + " model element type endpoint role", targetModelElemTypeRef.getObject().getName());
if (isBinarySrc && containerMappingTypeRef.getModelElemEndpointRefs().size() == 1) { // guarantee that src endpoint comes before tgt endpoint
ModelElementEndpointReference tgtModelElemTypeEndpointRef = containerMappingTypeRef.getModelElemEndpointRefs().get(0);
tgtModelElemTypeEndpointRef.deleteTypeAndReference(true);
modelElemTypeEndpoint.createSubtypeAndReference(newModelElemTypeEndpointName, targetModelElemTypeRef, true, containerMappingTypeRef);
tgtModelElemTypeEndpointRef.getObject().getSupertype().createSubtypeAndReference(tgtModelElemTypeEndpointRef.getObject().getName(), tgtModelElemTypeEndpointRef.getModelElemRef(), false, containerMappingTypeRef);
}
else {
modelElemTypeEndpoint.createSubtypeAndReference(newModelElemTypeEndpointName, targetModelElemTypeRef, isBinarySrc, containerMappingTypeRef);
}
}
}
// no need to init type hierarchy, no need for undo/redo
}
protected void doExecuteInstancesLevel(BinaryMappingReference containerMappingRef, ModelElementReference targetModelElemRef, boolean isBinarySrc) throws MMINTException, MIDDialogCancellation {
ModelElementEndpointReference oldModelElemEndpointRef = (isBinarySrc) ?
containerMappingRef.getModelElemEndpointRefs().get(0) :
containerMappingRef.getModelElemEndpointRefs().get(1);
ModelElementEndpointReference modelElemTypeEndpointRef = MIDDialogs.selectModelElementTypeEndpointToCreate(containerMappingRef, modelElemTypeEndpointUris);
modelElemTypeEndpointRef.getObject().replaceInstanceAndReference(oldModelElemEndpointRef, targetModelElemRef);
}
/**
* Changes the source model element reference of a binary link.
*
* @return The ok result.
* @throws ExecutionException
* Never thrown.
*/
@Override
protected CommandResult reorientSource() throws ExecutionException {
try {
switch (getLink().getObject().getLevel()) {
case TYPES:
this.doExecuteTypesLevel(getLink(), getNewSource(), true);
break;
case INSTANCES:
this.doExecuteInstancesLevel(getLink(), getNewSource(), true);
break;
case WORKFLOWS:
throw new MMINTException("The WORKFLOWS level is not allowed");
default:
throw new MMINTException("The MID level is missing");
}
return CommandResult.newOKCommandResult(getLink());
}
catch (MIDDialogCancellation e) {
return CommandResult.newCancelledCommandResult();
}
catch (MMINTException e) {
MMINTException.print(IStatus.ERROR, "No model element endpoint changed", e);
return CommandResult.newErrorCommandResult("No model element endpoint changed");
}
}
/**
* Changes the target model element reference of a binary link.
*
* @return The ok result.
* @throws ExecutionException
* Never thrown.
*/
@Override
protected CommandResult reorientTarget() throws ExecutionException {
try {
switch (getLink().getObject().getLevel()) {
case TYPES:
this.doExecuteTypesLevel(getLink(), getNewTarget(), false);
break;
case INSTANCES:
this.doExecuteInstancesLevel(getLink(), getNewTarget(), false);
break;
case WORKFLOWS:
throw new MMINTException("The WORKFLOWS level is not allowed");
default:
throw new MMINTException("The MID level is missing");
}
return CommandResult.newOKCommandResult(getLink());
}
catch (MIDDialogCancellation e) {
return CommandResult.newCancelledCommandResult();
}
catch (MMINTException e) {
MMINTException.print(IStatus.ERROR, "No model element endpoint changed", e);
return CommandResult.newErrorCommandResult("No model element endpoint changed");
}
}
}