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Browse a type passed to AbstractModelInferrer [message #1220890]

Sun, 15 December 2013 16:08

Cioran Naroic

Messages: 18
Registered: December 2013

Junior Member

Hi everyone,

I'm designing a DSL with Xtext, using an AbstractModelInferrer to map the concepts of my DSL to the Java concepts.

One of my grammar rule looks as follows:

...
EcorePkgDecl:
    'from' pkg = JvmTypeReference
;
...

The classical usage is as follows (somedsl.SomedslPackage is a user package generated by EMF):

...
from somedsl.SomedslPackage
...

In my AbstractModelInferrer, I want to be able to browse (ie. use reflection) on the JvmTypeReference that represents the somedsl.SomedslPackage. My goal is to generate Java interfaces for the package itself and for each EClass contained in the package. I was planning to use reflection on the EPackage to get this information and generate my interfaces.

Unfortunately, I don't see anyway to do that. Maybe I should use another rule in my grammar (something else than JvmTypeReference). Or maybe there's a trick in the AbstractModelInferrer to emulate such behavior.

Thank you for your help Smile

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Re: Browse a type passed to AbstractModelInferrer [message #1231555 is a reply to message #1220890]

Tue, 14 January 2014 23:52

Anil Bhatia

Messages: 23
Registered: February 2011

Junior Member

Were you able to resolve this, and could you please share the solution..?

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Re: Browse a type passed to AbstractModelInferrer [message #1231678 is a reply to message #1220890]

Wed, 15 January 2014 07:26

Sven Efftinge

Messages: 1823
Registered: July 2009

Senior Member

during 'preIndexingPhase' you are only able to look up types sitting in
upstream projects and jars. If the EPackage is local you won't see it.

And you won't get the java.lang.Class but a JvmGenericType, which will
allow you to inspect it.

Am 16/12/13 20:24, schrieb Cioran Naroic:
> Hi everyone,
>
> I'm designing a DSL with Xtext, using an AbstractModelInferrer to map
> the concepts of my DSL to the Java concepts.
>
> One of my grammar rule looks as follows:
>
> ...
> EcorePkgDecl:
> 'from' pkg = JvmTypeReference
> ;
> ...
>
>
> The classical usage is as follows (somedsl.SomedslPackage is a user
> package generated by EMF):
>
> ...
> from somedsl.SomedslPackage
> ...
>
>
> In my AbstractModelInferrer, I want to be able to browse (ie. use
> reflection) on the JvmTypeReference that represents the
> somedsl.SomedslPackage. My goal is to generate Java interfaces for the
> package itself and for each EClass contained in the package. I was
> planning to use reflection on the EPackage to get this information and
> generate my interfaces.
>
> Unfortunately, I don't see anyway to do that. Maybe I should use another
> rule in my grammar (something else than JvmTypeReference). Or maybe
> there's a trick in the AbstractModelInferrer to emulate such behavior.
>
> Thank you for your help :)

--
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Go to: http://xtext.itemis.com
Twitter : @svenefftinge
Blog : http://blog.efftinge.de

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