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Xtext/xtend generating an intf for type [message #843390]

Thu, 12 April 2012 22:13

Eclipse User

I am using Indigo w/xtext&xtend 2.2.1, xbase and mwe2 to develop a dsl.

I am struggling with ability to have xtend code generate an additional interface file.

I have tried creating additional xtend files along with a specific mwe2 file but closest I get is code generation of files way other than my model and it gets done at typedef time rather than when in launched eclipse rt when plugin is installed and operational.

I am also curious if there is a way in which the intf/impl and other xtend templates from eclipse plugin can be actually exposed to the user in resulting project so they could be tweaked by advanced users.

I read on this site "Xtend just does classes and nothing else"...does this mean I must use Xpand or Jet for my intf definitions generated from dsl?

Thanks in advance...mike.

[Updated on: Thu, 12 April 2012 23:16] by Moderator

Re: Xtext/xtend generating an intf for type [message #843481 is a reply to message #843390]

Fri, 13 April 2012 00:35

Eclipse User

hi,

if you are using xbase, i guess you should override AbstractModelInferrer to infer your Jvm model
here is a code sample to infer an interface and an implementation for a DSL model element:

   	def dispatch infer(Entity e, IAcceptor<JvmDeclaredType> acceptor, boolean isPrelinkingPhase) {

		if(e.fullyQualifiedName==null) return

		val iface = e.toInterface(e.fullyQualifiedName.toString)[
		]
		
		val impl = e.toClass(e.implFullyQualifiedName.toString)[
			superTypes += iface.createTypeRef()
			createDefaultConstructor(e)
		]
		
		acceptor.accept(iface)
		acceptor.accept(impl)
	}

Re: Xtext/xtend generating an intf for type [message #844484 is a reply to message #843481]

Fri, 13 April 2012 23:03

Eclipse User

This is already being done (per new xtext project)...and modifying project's primary/sole xtend file won't get me an additional intf file produced I believe.

I am looking for more xtext-xtend unified means of producing all artifacts (w/my own codegen) I need to implement "type" definition. The ability to use something like xbase to more easily produce/xform "handler" methods in my model is appealing.

Ecore produces an intf/impl for codegen (I realize there are 'n' ways to do this) but I am looking for additional lang features xtext provides. Am still pretty new to using eclipse for modeling and it took days to get past old versions, read of numerous docs, etc.

My language for describing models is akin to an "expanded ecore". I only expect textual editing of models to be most appropriate. I hope to use gef/gmf later for the application model.

From my current read of things I am expecting to modify my mwe2 workflow file to process an additional pipeline for interface artifact.

Re: Xtext/xtend generating an intf for type [message #844732 is a reply to message #844484]

Sat, 14 April 2012 05:37

Eclipse User

Hi,

what about posting your mew2 including a comment so that we can understand what you really want to do.

~Christian

Re: Xtext/xtend generating an intf for type [message #845112 is a reply to message #844732]

Sat, 14 April 2012 15:11

Eclipse User

As I am unsure how to modify my mwe2 to produce/codegen a 2nd file for intf I am unsure of good this would do.

I'm assuming my question is posed correctly...if I'm modeling entities I would think more than 1:1 entity->classImpl mapping w/be required by many folks. I may want to generate additional files for intfs, data adapters, event handling, etc.

I am looking how/where to hookup a 2nd xtend file (if I understand xtend cg correctly) to produce this 2nd intf file when plugin gets installed/run. Right now only an impl gets generated.

So my type I've defined is foo with a property bar::string I would expect impl w/attr and getter/setter (already provided via xtext/xtend) and a 2nd file for the methods only.

[Updated on: Sat, 14 April 2012 15:12] by Moderator

Re: Xtext/xtend generating an intf for type [message #845132 is a reply to message #845112]

Sat, 14 April 2012 15:42

Eclipse User

Hi,

there are lots of possibilities to do this. dpending if you want to hook in via workflow or builder or whatever

(1) Infer the Stuff using JvmModelInferrer
(2) Subclass JvmModelGenerator and hook into the doGenerate Method (you habe to change the IGenerator Binding)
(3) bind a second/different IGenerator in a second ISetup / Special RuntimeModule and declare a second Generator Component in the Workflow.

(2) and (3) are Independent from using Xbase/Jvm Model Inferring

A Similar Question is handled in
http://www.eclipse.org/forums/index.php/mv/msg/262341/757455/#msg_757455

~<Christian

[Updated on: Sat, 14 April 2012 15:43] by Moderator

Re: Xtext/xtend generating an intf for type [message #846057 is a reply to message #845132]

Sun, 15 April 2012 14:11

Eclipse User

Thanks so much for assistance Christian/all.

I will look into all of these points.

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