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Use extension for main JvmModelInferrer [message #1740477]

Sun, 14 August 2016 14:27

Oleg Cohen

Messages: 28
Registered: August 2016

Junior Member

Greetings,

Our main JvmModelInferrer class is becoming rather long and I would like to create a number of additional extension classes to delegate infer logic for different elements and types in our model.

I have this class:

class AcmeDslJvmModelInferrer extends AbstractModelInferrer

I created another one:

class TypeXDslJvmModelInferrer extends AbstractModelInferrer

def inferTypeX(TypeX typeX, extension IJvmDeclaredTypeAcceptor acceptor, boolean prelinkingPhase) { ... }

and added this to the AcmeDslJvmModelInferrer class:

@Inject extension TypeXDslJvmModelInferrer typeXDslJvmModelInferrer

The extension is called correctly but when I do:

accept(...) [

typeX.superTypes += ....
]

I get a NullPointerException. Is there a particular way an extension has to be implemented and wired in?

Thank you!
Oleg

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Re: Use extension for main JvmModelInferrer [message #1740540 is a reply to message #1740477]

Mon, 15 August 2016 14:25

Christian Dietrich

Messages: 13887
Registered: July 2009

Senior Member

have a look at org.eclipse.xtext.xbase.jvmmodel.AbstractModelInferrer.setContext(Resource)

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Re: Use extension for main JvmModelInferrer [message #1740567 is a reply to message #1740540]

Mon, 15 August 2016 18:23

Oleg Cohen

Messages: 28
Registered: August 2016

Junior Member

Hi Christian,

Thank you for replying. Which component calls this method and how can I actually call it for my extension class?

I would appreciate additional info!

Best,
Oleg

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Re: Use extension for main JvmModelInferrer [message #1740570 is a reply to message #1740567]

Mon, 15 August 2016 18:27

Christian Dietrich

Messages: 13887
Registered: July 2009

Senior Member

i assume you have to overide this in your code and to the same for stuff in your extension (init annotationTypesBuilder and typeReferenceBuilder there manually)
(dont know your exact structure, what you try to do is rather ununusal)

Need professional support for Xtext, Xpand, EMF?
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Re: Use extension for main JvmModelInferrer [message #1740579 is a reply to message #1740570]

Mon, 15 August 2016 19:24

Oleg Cohen

Messages: 28
Registered: August 2016

Junior Member

Thank you for the suggestion, it worked!

The reason I am trying to split and use extensions is because my JvmModelInferrer class is becoming really large and I would like to split it into multiple files. Is there perhaps a better way to do so?

Thanks,
Oleg

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