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Re: [henshin-user] (no subject)

Vogella has a nice example here (using standard EMF resource sets, you will need to kep using a HenshinResourceSet): http://www.vogella.com/tutorials/EclipseEMFPersistence/article.html#load-an-existing-model . The links in there should take you to more details. I forget what HenshinResourceSet already sets up for you, but recall having issues with it when the rules and corresponding metamodel weren't in the right relative positions.

Steffen


On 08/02/2017 09:42, Loic Gammaitoni wrote:
@Daniel, I think this FAQ doesn't apply as the transformation executes correctly when using the Henshin GUI  in Eclipse.

@Steffen, this might well be the case as nowhere in the code have I imported my ecore model.
I attach my code at the end of this mail ( this code was copy pasted from the henshin interpreter page).
Do I have to add an instruction to import the ecore metamodel ? If so, how to do it ? ( I'm relatively new to the ecore world ).

Thanks for the swift reply,
Cheers,

Loïc

                HenshinResourceSet resourceSet = new HenshinResourceSet(workingDir);
   
                // Load a model:
                Resource model = resourceSet.getResource(input);
                 
                // Load the Henshin module:
                Module module = resourceSet.getModule(transformation);
                 
                // Apply the transformation (see below)...
                 
                // Save the model:
                model.save(null);
               
                // Prepare the engine:
                Engine engine = new EngineImpl();
                 
                // Initialize the graph:
                EGraph graph = new EGraphImpl(model);
               
                 
                // Find the unit to be applied:
                Unit u = module.getUnit(unit);
           
                // Apply the unit:
                UnitApplication application = new UnitApplicationImpl(engine, graph, u, null);
                application.execute(null);

       



On Wed, Feb 8, 2017 at 9:24 AM, Steffen Zschaler <steffen.zschaler@xxxxxxxxx> wrote:

From the stack trace, it looks like this occurs inside ECore. Have you set up your resource set correctly to include all the relevant metamodels?

Many thanks,

Steffen


On 08/02/2017 07:38, Daniel Strüber wrote:
Dear Loic,

there is an a FAQ entry about null pointer exceptions (NPEs) while executing a transformation, have you checked it? https://wiki.eclipse.org/Henshin_FAQ#I_get_NPEs_when_I_try_to_execute_my_transformation

Besides that, if possible, it would help us if you can attach the Java code, so we can look at it (I assume you modified it a bit so that it matches your transformation).

Best regards,
Daniel

Am 07.02.2017 um 23:48 schrieb loic.gammaitoni@xxxxxxxxx:

Dear mailing list readers,

I’m interested in measuring the time needed by Henshin to execute a transformation (see attached cdrefinement.henshin) on a given xmi model ( size10.xmi conforming to CD.ecore). The transformation works great when running through eclipse but unfortunately I can’t see any log of the time it took to be computed.
I thus tried my luck in developing a small java application running the transformation and printing out the time taken and can’t get rid of a NullPointerException...
Here is the stacktrace: (note that I simply reused the code given in the henshin interpreter web page)

Exception in thread "main" java.lang.NullPointerException

                at org.eclipse.emf.ecore.impl.EClassImpl.getFeatureID(EClassImpl.java:1500)

                at org.eclipse.emf.ecore.impl.DynamicEObjectImpl.eDerivedStructuralFeatureID(DynamicEObjectImpl.java:218)

                at org.eclipse.emf.ecore.impl.BasicEObjectImpl.eGet(BasicEObjectImpl.java:1008)

                at org.eclipse.emf.ecore.impl.BasicEObjectImpl.eGet(BasicEObjectImpl.java:1003)

                at org.eclipse.emf.ecore.impl.BasicEObjectImpl.eGet(BasicEObjectImpl.java:998)

                at org.eclipse.emf.henshin.interpreter.impl.ChangeImpl$AttributeChangeImpl.applyAndReverse(ChangeImpl.java:134)

                at org.eclipse.emf.henshin.interpreter.impl.ChangeImpl$CompoundChangeImpl.applyAndReverse(ChangeImpl.java:466)

                at org.eclipse.emf.henshin.interpreter.impl.RuleApplicationImpl.undo(RuleApplicationImpl.java:126)

                at org.eclipse.emf.henshin.interpreter.impl.UnitApplicationImpl.undo(UnitApplicationImpl.java:135)

                at org.eclipse.emf.henshin.interpreter.impl.UnitApplicationImpl.executeSequentialUnit(UnitApplicationImpl.java:230)

                at org.eclipse.emf.henshin.interpreter.impl.UnitApplicationImpl.doExecute(UnitApplicationImpl.java:104)

                at org.eclipse.emf.henshin.interpreter.impl.UnitApplicationImpl.execute(UnitApplicationImpl.java:90)

                at Interpreter.interpret(Interpreter.java:80)

                at Main.main(Main.java:38)


Do you have any idea what causes this error ?

Also, is there a way to get the time taken by henshin to execute a transformation directly in eclipse ( without having to program anything )

Cheers,
Loïc

 

 

 

 



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To change your delivery options, retrieve your password, or unsubscribe from this list, visit
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-- 
Dr. rer. nat. Steffen Zschaler AHEA
Senior Lecturer

King's College London
Department of Informatics

Email szschaler@xxxxxxx
Phone +44 (020) 7848 1513
WWW   http://www.steffen-zschaler.de/