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JvmTypesBuilder extension injection does not work in static inner classes [message #1746322]

Wed, 26 October 2016 22:03

Olaf Bigalk

Messages: 155
Registered: July 2009
Location: Berlin

Senior Member

I want to create a template class for my JvmInferrer but the injection of the JvmTypesBuilder does not work in static inner classes.

	
	static class IndexReaderBuildTemplate {

		@Inject extension JvmTypesBuilder

                ...
			acceptor.accept(element.toClass(fqIndexReaderInterfacename)) [
 		
			members += element.toMethod("open", typeRef(void)) [

The typeRef function is unknown to the class.

What can I do ?

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Re: JvmTypesBuilder extension injection does not work in static inner classes [message #1746327 is a reply to message #1746322]

Thu, 27 October 2016 04:51

Christian Dietrich

Messages: 14497
Registered: July 2009

Senior Member

hi from my point of view it makes no sense to have a inner class here.

since you would have to do the same as

@Inject extension JvmTypesBuilder org.eclipse.xtext.xbase.jvmmodel.AbstractModelInferrer.setContext(Resource)

does for your actual inferrer for your inner classes

=> inject JvmTypeReferenceBuilder
=> call setContext on instances JvmTypeReferenceBuilder members

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Re: JvmTypesBuilder extension injection does not work in static inner classes [message #1746442 is a reply to message #1746327]

Fri, 28 October 2016 18:39

Sven Efftinge

Messages: 83
Registered: January 2016
Location: Kiel

Member

So instead of using injection you could make it a simple property that you initialize via constructor.
E.g.:

new IndexReaderBuildTemplate(_jvmTypesBuilder)

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Re: JvmTypesBuilder extension injection does not work in static inner classes [message #1746443 is a reply to message #1746442]

Fri, 28 October 2016 18:47

Sven Efftinge

Messages: 83
Registered: January 2016
Location: Kiel

Member

Also the injection only works on instances created by an injector (or explicitly provided to an injector for injection).
So you could inject an instance of your static class into the inferrer, and then injection would work transitively in that object as well.
But because of Christian's point you should not do it in this case.

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