/**
* 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.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.ModelEndpoint;
import edu.toronto.cs.se.mmint.mid.relationship.ModelRel;
/**
* The command to remove a model from a model relationship.
*
* @author Alessio Di Sandro
*
*/
public class ModelRelRemoveModelEndpointCommand extends DestroyElementCommand {
/**
* Constructor: initialises the superclass.
*
* @param request
* The request.
*/
public ModelRelRemoveModelEndpointCommand(DestroyElementRequest request) {
super(request);
}
/**
* Checks if a model can be removed.
*
* @return True if a model can be removed, false otherwise.
*/
@Override
public boolean canExecute() {
ModelRel modelRel = (ModelRel) getElementToEdit();
return super.canExecute() && (
modelRel.isInstancesLevel() ||
(modelRel.isWorkflowsLevel() && modelRel.getMIDContainer().getOperators().isEmpty()) ||
!MIDTypeHierarchy.isRootType((ModelEndpoint) getElementToDestroy())
);
}
protected void doExecuteTypesLevel() throws MMINTException {
((ModelEndpoint) getElementToDestroy()).deleteType(true);
// no need to init type hierarchy, no need for undo/redo
}
protected void doExecuteInstancesLevel() throws MMINTException {
((ModelEndpoint) getElementToDestroy()).deleteInstance(true);
}
protected void doExecuteWorkflowsLevel() throws MMINTException {
((ModelEndpoint) getElementToDestroy()).deleteWorkflowInstance();
}
/**
* Removes a model from a model relationship.
*
* @param monitor
* The progress monitor.
* @param info
* Additional parameter, not used.
* @return The ok result.
* @throws ExecutionException
* Never thrown.
*/
@Override
protected CommandResult doExecuteWithResult(IProgressMonitor monitor, IAdaptable info) throws ExecutionException {
try {
switch (((ModelRel) getElementToEdit()).getLevel()) {
case TYPES:
this.doExecuteTypesLevel();
break;
case INSTANCES:
this.doExecuteInstancesLevel();
break;
case WORKFLOWS:
this.doExecuteWorkflowsLevel();
break;
default:
throw new MMINTException("The MID level is missing");
}
return super.doExecuteWithResult(monitor, info);
}
catch (MMINTException e) {
MMINTException.print(IStatus.ERROR, "No model endpoint deleted", e);
return CommandResult.newErrorCommandResult("No model endpoint deleted");
}
}
}