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JVM model inferrer for non-xbase models [message #757895]

Mon, 21 November 2011 15:56

Kai Kreuzer

Messages: 42
Registered: July 2009

Member

Hi,

I have an an entity model, whose DSL does not extend Xbase (and I cannot
change this). Nonetheless, I would like to reference these entities from
Xbase-based models - for this, it would be nice if I could simply
implement a JvmModelInferrer for the non-Xbase model - but how would I
best do this? The whole "inferring" infrastructure is only generated for
Xbase-based DSLs. Is there an easy way to achieve this nonetheless?

Glad for any hints!
Kai

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Re: JVM model inferrer for non-xbase models [message #758273 is a reply to message #757895]

Tue, 22 November 2011 14:20

Meinte Boersma

Messages: 434
Registered: July 2009
Location: Leiden, Netherlands

Senior Member

To reference entities in your DSL in an Xbase-based DSL you just need to import your DSL's meta model into the grammar for the Xbase-based DSL and make sure you have cross-references to the entity concept. The JvmModelInferrer is used to define a mapping from DSL concepts to Java types so that's only useful if your entity concept has a JVM counterpart (e.g., through code generation), in which case it can be used as target in the Xbase-based DSL without explicitly creating cross-references to that type.

Xtext blogs: executable models...again? | workshop material | custom scoping with Xtend

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Re: JVM model inferrer for non-xbase models [message #758282 is a reply to message #758273]

Tue, 22 November 2011 14:41

Kai Kreuzer

Messages: 42
Registered: July 2009

Member

> so that's only useful if your entity concept has a JVM counterpart

I am not sure about that. What I would like to achieve is to be able to
travers my (non-xbase) entity model within my xbase-DSL with feature calls.
Example: I have Entity "a" in the scope, I would like to be able to do a
"a.b.c" expression.
As far as I understand, Xbase requires me to have JvmTypes for these
entities/properties (unless I am re-implementing XAbstractFeatureCall
myself). Note that I do not have a "real" JVM counterpart for these
JvmTypes, they would only exist "virtually".

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Re: JVM model inferrer for non-xbase models [message #758293 is a reply to message #758282]

Tue, 22 November 2011 15:18

Meinte Boersma

Messages: 434
Registered: July 2009
Location: Leiden, Netherlands

Senior Member

I should have said that JvmModelInferrer only caters for the situation that your DSL concepts have JVM counterparts. Having Xbase-type functionality for your concepts would indeed be useful. I think that overriding XAbstractFeatureCall to include references to your DSL concepts (and features thereof) is probably the way to go. You'll have to override/extend Xbase scoping as well.

Xtext blogs: executable models...again? | workshop material | custom scoping with Xtend

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