/**
* 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 org.eclipse.core.commands.ExecutionException;
import org.eclipse.core.runtime.IAdaptable;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.gmf.runtime.common.core.command.CommandResult;
import org.eclipse.gmf.runtime.emf.type.core.commands.DestroyElementCommand;
import org.eclipse.gmf.runtime.emf.type.core.requests.DestroyElementRequest;
import edu.toronto.cs.se.mmint.MMINTException;
import edu.toronto.cs.se.mmint.MIDTypeHierarchy;
import edu.toronto.cs.se.mmint.mid.relationship.MappingReference;
import edu.toronto.cs.se.mmint.mid.relationship.ModelElementEndpointReference;
/**
* The command to remove a model element reference from a link.
*
* @author Alessio Di Sandro
*
*/
public class MappingReferenceRemoveModelElementEndpointReferenceCommand extends DestroyElementCommand {
public MappingReferenceRemoveModelElementEndpointReferenceCommand(DestroyElementRequest request) {
super(request);
}
@Override
public boolean canExecute() {
MappingReference mappingRef = (MappingReference) getElementToEdit();
return super.canExecute() && (
mappingRef.isInstancesLevel() ||
(mappingRef.isTypesLevel() && !MIDTypeHierarchy.isRootType(((ModelElementEndpointReference) getElementToDestroy()).getObject()))
);
}
protected void doExecuteTypesLevel() throws MMINTException {
((ModelElementEndpointReference) getElementToDestroy()).deleteTypeAndReference(true);
// no need to init type hierarchy, no need for undo/redo
}
protected void doExecuteInstancesLevel() throws MMINTException {
((ModelElementEndpointReference) getElementToDestroy()).deleteInstanceAndReference(true);
}
@Override
protected CommandResult doExecuteWithResult(IProgressMonitor monitor, IAdaptable info) throws ExecutionException {
try {
switch (((MappingReference) getElementToEdit()).getObject().getLevel()) {
case TYPES:
this.doExecuteTypesLevel();
break;
case INSTANCES:
this.doExecuteInstancesLevel();
break;
case WORKFLOWS:
throw new MMINTException("The WORKFLOWS level is not allowed");
default:
throw new MMINTException("The MID level is missing");
}
return super.doExecuteWithResult(monitor, info);
}
catch (MMINTException e) {
MMINTException.print(IStatus.ERROR, "No model element endpoint deleted", e);
return CommandResult.newErrorCommandResult("No model element endpoint deleted");
}
}
}