/*******************************************************************************
* Copyright (c) 2014 Willink Transformations and others.
* 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:
* E.D.Willink - Initial API and implementation
*******************************************************************************/
package org.eclipse.ocl.examples.debug.stepper;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.jdt.annotation.NonNull;
import org.eclipse.jdt.annotation.Nullable;
import org.eclipse.ocl.examples.debug.vm.evaluator.VMEvaluationStepper;
import org.eclipse.ocl.pivot.Element;
import org.eclipse.ocl.pivot.IterateExp;
import org.eclipse.ocl.pivot.Variable;
public class IterateExpStepper extends LoopExpStepper
{
public static @NonNull IterateExpStepper INSTANCE = new IterateExpStepper();
@Override
public @Nullable Element isPostStoppable(@NonNull VMEvaluationStepper vmEvaluationVisitor, @NonNull Element childElement, @Nullable Object result) {
EObject parentElement = childElement.eContainer();
if (parentElement instanceof Variable) {
parentElement = parentElement.eContainer();
}
if (parentElement instanceof IterateExp) {
IterateExp iterateExp = (IterateExp)parentElement;
if (childElement == iterateExp.getOwnedSource()) {
Variable accumulator = iterateExp.getOwnedResult();
if (accumulator != null) {
return getFirstElement(vmEvaluationVisitor, accumulator);
}
}
}
return super.isPostStoppable(vmEvaluationVisitor, childElement, result);
}
}