Skip to main content


Eclipse Community Forums
Forum Search:

Search      Help    Register    Login    Home
Home » Modeling » TMF (Xtext) » JvmModelInferrer and InferredTypes
JvmModelInferrer and InferredTypes [message #1022422] Thu, 21 March 2013 21:01 Go to next message
Christian Dietrich is currently offline Christian DietrichFriend
Messages: 13319
Registered: July 2009
Senior Member
Hi,

i a playing around with xbase' new typesystem.

here is my grammar

Model:
	elements+=Element*;
	
Element:
	"field" name=ID "=" init=XExpression; 


I want to create a javabean out of this. here is my inferrer

class MyDslJvmModelInferrer extends AbstractModelInferrer {

	@Inject extension JvmTypesBuilder
	@Inject extension TypeReferences


	
   	def dispatch void infer(Model model, IJvmDeclaredTypeAcceptor acceptor, boolean isPreIndexingPhase) {
   		acceptor.accept(model.toClass("my.company.greeting.MyGreetings"))
   			.initializeLater([
   				for (e : model.elements.filter(x|x.name != null && x.init != null)) {
   					val f = e.toField(e.name, inferredType) [
   						initializer = e.init
   					]
   					members += f
   					members += e.toGetter(e.name, inferredType(e.init))
   					members += e.toSetter(e.name, inferredType(e.init))
   					
   					
   				}
   			])
   	}
}



somehow the inferring is not working

field xxxx = "aaaa"
@SuppressWarnings("all")
public class MyGreetings {
  private String xxxx = "aaaa";
  
  public Object getXxxx() {
    return this.xxxx;
  }
  
  public void setXxxx(final String xxxx) {
    this.xxxx = xxxx;
  }
}


what am i missing?

another question is: can i use an inferred type without
actually reusing the xexpression the inferrer
(e.g. leave out initializer = e.init)

val f = e.toField(e.name, inferredType(e.init)) []
   					members += f
   					members += e.toGetter(e.name, inferredType(e.init))
   					members += e.toSetter(e.name, inferredType(e.init))

this gives me

Cannot infer type from recursive usage. Type 'Object' is used.

or should i use a "typeprovider" diectly in this case. if so what would be the replacement for the deprecated old one.

Thanks
Christian


Need professional support for Xtext, Xpand, EMF?
Go to: https://www.itemis.com/en/xtext/
Twitter : @chrdietrich
Blog : https://www.dietrich-it.de
Re: JvmModelInferrer and InferredTypes [message #1022776 is a reply to message #1022422] Fri, 22 March 2013 13:54 Go to previous message
Sebastian Zarnekow is currently offline Sebastian ZarnekowFriend
Messages: 3107
Registered: July 2009
Senior Member
Hi Christian,

there is no API for that purpose available yet, but you could try to use
the type of the field itself, e.g. this inferrer works for me:

@Inject extension JvmTypesBuilder

def dispatch void infer(Model model, IJvmDeclaredTypeAcceptor acceptor,
boolean isPreIndexingPhase) {
acceptor.accept(model.toClass("my.company.greeting.MyGreetings")).initializeLater(
[
for (e : model.elements.filter(x|x.name != null && x.init != null)) {
val f = e.toField(e.name, inferredType(e.init)) [
initializer = e.init
]
members += f
members += e.toGetter(e.name, f.type)
members += e.toSetter(e.name, f.type)

}

])
}

Regarding your second question: No, currently it's not easily possible
to have an inferred type without an associated expression, though we
definitely want to support that. The API as is is still rough and not
yet settled though your feedback is very valuable to use. Could you
collect that in a bugzilla ticket? We want to improve on that for all
Xbase clients until the bundles are sealed for the Kepler release.

Best regards,
Sebastian
--
Looking for professional support for Xtext, Xtend or Eclipse Modeling?
Go visit: http://xtext.itemis.com

Am 21.03.13 22:01, schrieb Christian Dietrich:
> Hi,
>
> i a playing around with xbase' new typesystem.
>
> here is my grammar
>
>
> Model:
> elements+=Element*;
>
> Element:
> "field" name=ID "=" init=XExpression;
>
> I want to create a javabean out of this. here is my inferrer
>
>
> class MyDslJvmModelInferrer extends AbstractModelInferrer {
>
> @Inject extension JvmTypesBuilder
> @Inject extension TypeReferences
>
>
>
> def dispatch void infer(Model model, IJvmDeclaredTypeAcceptor
> acceptor, boolean isPreIndexingPhase) {
>
> acceptor.accept(model.toClass("my.company.greeting.MyGreetings"))
> .initializeLater([
> for (e : model.elements.filter(x|x.name != null &&
> x.init != null)) {
> val f = e.toField(e.name, inferredType) [
> initializer = e.init
> ]
> members += f
> members += e.toGetter(e.name, inferredType(e.init))
> members += e.toSetter(e.name, inferredType(e.init))
>
>
> }
> ])
> }
> }
>
>
>
> somehow the inferring is not working
>
> field xxxx = "aaaa"
>
> @SuppressWarnings("all")
> public class MyGreetings {
> private String xxxx = "aaaa";
>
> public Object getXxxx() {
> return this.xxxx;
> }
>
> public void setXxxx(final String xxxx) {
> this.xxxx = xxxx;
> }
> }
>
>
> what am i missing?
>
> another question is: can i use an inferred type without actually reusing
> the xexpression the inferrer
> (e.g. leave out initializer = e.init)
>
> val f = e.toField(e.name, inferredType(e.init)) []
> members += f
> members += e.toGetter(e.name, inferredType(e.init))
> members += e.toSetter(e.name, inferredType(e.init))
> this gives me
>
> Cannot infer type from recursive usage. Type 'Object' is used.
> or should i use a "typeprovider" diectly in this case. if so what would
> be the replacement for the deprecated old one.
>
> Thanks
> Christian
>
Previous Topic:Check Type of Element
Next Topic:Updating completely hosed my environment
Goto Forum:
  


Current Time: Tue Jan 28 07:13:46 GMT 2020

Powered by FUDForum. Page generated in 0.02132 seconds
.:: Contact :: Home ::.

Powered by: FUDforum 3.0.2.
Copyright ©2001-2010 FUDforum Bulletin Board Software

Back to the top