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Referencing ecore primitive types in Xtend [message #546006]

Fri, 09 July 2010 20:59

Edwin Park

Messages: 124
Registered: July 2009

Senior Member

Hi,

I'm trying to do some M2M transformation of an Xtext metamodel to Ecore using Xtend. But when I try to e.g. set the EType of an EAttribute to EDate:

create EAttribute eAttribute(Property property):
setEType(EDate);

It fails with "Couldn't find operation 'setEType(xpand2::Type)' for ecore::EAttribute". It turns out whenever I try referencing Ecore primitive types like EString, EBoolean, EDate, they are automaticaly translated into their Java equivalents (String, Boolean, java::util::Date).

Is there some way I can access the actual ecore::EDate type (or other ecore primitive types) so that I can set it in my EAttribute?

Thanks,
Edwin

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Re: Referencing ecore primitive types in Xtend [message #546038 is a reply to message #546006]

Sat, 10 July 2010 08:14

Christian Dietrich

Messages: 13313
Registered: July 2009

Senior Member

Hello,

yes there is a way. e.g. use a JAVA Extension

package template;

import org.eclipse.emf.ecore.EDataType;
import org.eclipse.emf.ecore.EcorePackage;

public class Helper {
	
	public static EDataType getEDate() {
		return EcorePackage.Literals.EDATE;
	}

}

create ecore::EAttribute this getEAttr() :
	this.setEType(getEDate()) ->
	this.setName("attr");
	
ecore::EDataType getEDate() :
	JAVA template.Helper.getEDate();

Regards
Christian

Need professional support for Xtext, Xpand, EMF?
Go to: https://www.itemis.com/en/xtext/
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