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redefining types in an Xpand project [message #517132]

Fri, 26 February 2010 06:16

Eclipse User

I want to make a simple test, that would generate

		Typedef int Cap;
		class Plane {
				Cap cap;	
		}

Everything works but for one thing.

In my model.xmi, I created a Datatype Cap, which I'd like to be an Integer, just renamed.
Looking at the documentation, it seems to be called a parameterized type, but I just don't understand how to create/make/use it.

Regards
Maxime

PS : I'm sorry for having been asking what are basic ans dumb questions for the last few days, I just hope there won't be many more.

[Updated on: Fri, 26 February 2010 06:17] by Moderator

Re: redefining types in an Xpand project [message #517136 is a reply to message #517132]

Fri, 26 February 2010 06:26

Eclipse User

Hallo Maxime,

I have not enought information for an answer.
What metamodeling framework do you use:
EMF, UML2 ?

Is a 'parameterized type' part of your (meta-)metamodell,
or a type of your DSL?

Can you provide a more detailled example?

Regards
Darius

Re: redefining types in an Xpand project [message #517156 is a reply to message #517136]

Fri, 26 February 2010 07:19

Eclipse User

>I have not enought information for an answer.
>What metamodeling framework do you use:
>EMF, UML2 ?

I am using M2T, ecore, and I created an Xpand Project, with a sample (the my.generator.project that is used as an example).

>Is a 'parameterized type' part of your (meta-)metamodell,
>or a type of your DSL?

It's a type for my DSL. Right now I'm trying to create a Cap Type, that is just an alias for Integer (documentation seems to be calling that a 'parameterized type').

>Can you provide a more detailled example?

Not really, i'm trying to keep things simple now, before I go to more difficult things.
My model has a Datatype Cap, a Datatype Integer (never used), and an Entity Plane that has a Feature cap (which type I want to be of type Cap)

Thanks

Regards
Maxime

Re: redefining types in an Xpand project [message #517203 is a reply to message #517156]

Fri, 26 February 2010 10:21

Eclipse User

Hello,

hm, do you want somethng like this:

Adding concept 'ParameterizedType' to 'metamodel.ecore' (your DSL).

<eClassifiers xsi:type="ecore:EClass" name="ParameterizedType" eSuperTypes="#//Type">
    <eStructuralFeatures xsi:type="ecore:EReference" name="alias" eType="#//Datatype"/>
  </eClassifiers>

Using the new concept in the model like this:

<?xml version="1.0" encoding="ASCII"?>
<metamodel:Model ...">
  <types xsi:type="metamodel:Datatype" name="int"/>
  <types xsi:type="metamodel:Entity" name="Plane">
    <features name="cap" type="//@types.2"/>
  </types>
  <types xsi:type="metamodel:ParameterizedType" name="Cap" alias="//@types.0"/>
</metamodel:Model>

And Template like this:

«DEFINE javaClass FOR Entity»
	«FILE name+".java"-»
		«FOREACH features.type.typeSelect(ParameterizedType) AS f»
Typedef «f.alias.name» «f.name»;
		«ENDFOREACH-»
class «name» {
		«FOREACH features AS f-»
	«f.type.name»  «f.name»;
		«ENDFOREACH-»
}
	«ENDFILE»
«ENDDEFINE»

will result in:

Typedef int Cap;
class Plane {
	Cap  cap;
}

Regards
Darius

Re: redefining types in an Xpand project [message #517245 is a reply to message #517132]

Fri, 26 February 2010 11:36

Eclipse User

Yes, it's exactly that.

I thought my tutor didn't want me to add concepts at all, so I couldn't find how to do it he told me I could, and so I solved the problem.

Thank you

Regards
Maxime

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