/**
* 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.MMINT;
import edu.toronto.cs.se.mmint.MMINTException;
import edu.toronto.cs.se.mmint.MIDTypeHierarchy;
import edu.toronto.cs.se.mmint.mid.MID;
import edu.toronto.cs.se.mmint.mid.relationship.BinaryModelRel;
/**
* The command to delete a model relationship.
*
* @author Alessio Di Sandro
*
*/
public class BinaryModelRelDelCommand extends DestroyElementCommand {
/**
* Constructor: initialises the superclass.
*
* @param request
* The request.
*/
public BinaryModelRelDelCommand(DestroyElementRequest request) {
super(request);
}
/**
* Overrides superclass to re-initialize diagram type hierarchy.
*/
@Override
protected IStatus doUndo(IProgressMonitor monitor, IAdaptable info) throws ExecutionException {
IStatus status = super.doUndo(monitor, info);
MID mid = (MID) getElementToEdit();
if (mid.isTypesLevel()) {
MMINT.createTypeHierarchy(mid);
}
return status;
}
/**
* Overrides superclass to re-initialize diagram type hierarchy.
*/
@Override
protected IStatus doRedo(IProgressMonitor monitor, IAdaptable info) throws ExecutionException {
IStatus status = super.doRedo(monitor, info);
MID mid = (MID) getElementToEdit();
if (mid.isTypesLevel()) {
MMINT.createTypeHierarchy(mid);
}
return status;
}
/**
* Checks if a binary model relationship can be deleted.
*
* @return True if a binary model relationship can be deleted, false
* otherwise.
*/
@Override
public boolean canExecute() {
MID mid = (MID) getElementToEdit();
return super.canExecute() && (
mid.isInstancesLevel() ||
(mid.isWorkflowsLevel() && mid.getOperators().isEmpty()) ||
!MIDTypeHierarchy.isRootType((BinaryModelRel) getElementToDestroy())
);
}
protected void doExecuteTypesLevel() throws MMINTException {
((BinaryModelRel) getElementToDestroy()).deleteType();
MMINT.createTypeHierarchy((MID) getElementToEdit());
}
protected void doExecuteInstancesLevel() throws MMINTException {
((BinaryModelRel) getElementToDestroy()).deleteInstance();
}
protected void doExecuteWorkflowsLevel() throws MMINTException {
((BinaryModelRel) getElementToDestroy()).deleteWorkflowInstance();
}
/**
* Deletes a model relationship.
*
* @param monitor
* The progress monitor.
* @param info
* Additional parameter, not used.
* @return The ok result.
* @throws ExecutionException
* If the super implementation throws it.
*/
@Override
protected CommandResult doExecuteWithResult(IProgressMonitor monitor, IAdaptable info) throws ExecutionException {
try {
switch (((MID) 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 binary model relationship deleted", e);
return CommandResult.newErrorCommandResult("No binary model relationship deleted");
}
}
}