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[XPand2] Unknown type 'ecore::EClass' [message #662869]

Fri, 01 April 2011 06:14

Eclipse User

I'd like to transform EMF models to text. The special thing about my meta-model is that it contains references to the Ecore meta-model itself. Hence, it is not only an instance of Ecore, but in addition, has references to parts of Ecore. More precisely, an EClass in my meta-model has a reference to EClassifier.

Within my XPand template, I want to access the EClassifier via the respective reference from my meta-model. Since I am only interested in EClasses among the EClassifiers, I perform the appropriate typeSelect.

I have ne errors marked in the template, but on execution I get the following error message: Unknown type 'ecore::EClass'

This is a simplified version of my template. "Base" is an EClass of my meta-model which indirectly references "EClassifier".

«IMPORT xyz»

«DEFINE main FOR Base»
«EXPAND sub FOREACH this.baseref.ref.typeSelect(ecore::EClass)»
«ENDDEFINE»

«DEFINE sub FOR ecore::EClass»
«this.name»
«ENDDEFINE»

Can anyone imagine the problem? Can I solve the issue on the XPand site?

Re: [XPand2] Unknown type 'ecore::EClass' [message #662873 is a reply to message #662869]

Fri, 01 April 2011 06:46

Eclipse User

Hi,

can you show us how you call the XPand Template?

~Christian

Re: [XPand2] Unknown type 'ecore::EClass' [message #662875 is a reply to message #662869]

Fri, 01 April 2011 06:52

Eclipse User

I am currently using an MWE2 workflow file.

module xyz.generator

import org.eclipse.xtend.typesystem.emf.*
import org.eclipse.emf.mwe.utils.*
import org.eclipse.xpand2.*

var projectName = "my.generation"
var sourceFolder = "platform:/resource/${projectName}/src"
var sourceGenFolder = "../${projectName}/src-gen"

var xyzPackage = "xyz.XyzPackage"

var model = "${sourceFolder}/My.xyz"

Workflow {
	
	bean = StandaloneSetup {
		platformUri = ".."
	}
		
	bean = EmfMetaModel : mm_emf {
		metaModelPackage = "${xyzPackage}"
	}
	
	component = Reader {
		uri = "${model}"
		modelSlot = "model"
	}
			
	component = Generator {
		metaModel = mm_emf
		expand = "template::mydomain::main FOR model"
		outlet = {
			path = "${sourceGenFolder}" 
			append = true
		}
		fileEncoding = "UTF8"
	}

}

Thanks for the reply!

[Updated on: Fri, 01 April 2011 06:53] by Moderator

Re: [XPand2] Unknown type 'ecore::EClass' [message #662884 is a reply to message #662875]

Fri, 01 April 2011 07:33

Eclipse User

Hi,

you use the EmfMetaModel for your dsl in your workflow
maybe you have configure one for ecore itself too.

(pseudo code)

bean = EmfMetaModel : mm_ecore {
		metaModelPackage = "org.eclipse.emf.ecore.EcorePackage"
	}

metaModel = mm_ecore

~Christian

Re: [XPand2] Unknown type 'ecore::EClass' [message #662987 is a reply to message #662869]

Fri, 01 April 2011 14:14

Eclipse User

Yes, thank you very much!

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