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[Xtend2] Problem Creating JvmTypeReference to Existing Classes [message #758393]

Wed, 23 November 2011 05:32

Boris Pfahringer

Messages: 7
Registered: November 2011

Junior Member

Hey,

I'm trying to have all the classes I generate implement a specific interface. For simplicity let me demonstrate what I want to with the "Five simple steps to your JVM language" Tutorial as a basis.

I want all my classes to implement one interface, IEntity (just a dummy for demonstration):

package org.eclipse.xtext.example.domainmodel.runtime
public interface IEntity {}

I'm trying to do this by adding the interface to the list of superclasses of all the classes I generate like so (in DomainmodelJvmModelInferrer.xtend):

[...]
import org.eclipse.xtext.example.domainmodel.runtime.IEntity
[...]
def dispatch infer(Entity e, IAcceptor<JvmDeclaredType> acceptor, boolean prelinkingPhase) {
		acceptor.accept(
			e.toClass( e.fullyQualifiedName ) [
				// Always returns null :(
				superTypes += e.newTypeRef(typeof(IEntity))
[...]

Which always throws an AssertionError Sad

What am I doing wrong? Is ``newTypeRef()'' the wrong function to use?

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Re: [Xtend2] Problem Creating JvmTypeReference to Existing Classes [message #758407 is a reply to message #758393]

Wed, 23 November 2011 07:23

rjarana Missing name

Messages: 12
Registered: November 2011

Junior Member

Are you adding the interface IEntity to the classpath of the project? You have to add this interface (or any other class) to both the plug-in project and the model project.

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Re: [Xtend2] Problem Creating JvmTypeReference to Existing Classes [message #758610 is a reply to message #758407]

Wed, 23 November 2011 21:08

Boris Pfahringer

Messages: 7
Registered: November 2011

Junior Member

Currently IEntity is in the org.eclipse.xtext.example.domainmodel.runtime package inside the domainmodel plugin. The manifest of domainmodel is set to export org.eclipse.xtext.example.domainmodel.runtime:

Manifest-Version: 1.0
Bundle-ManifestVersion: 2
Bundle-Name: Xtext Domainmodel Example
Bundle-Vendor: Eclipse Modeling Project
Bundle-Version: 2.2.0.qualifier
Bundle-SymbolicName: org.eclipse.xtext.example.domainmodel; singleton:=true
[...]
Export-Package: org.eclipse.xtext.example.domainmodel,
 org.eclipse.xtext.example.domainmodel.runtime,
[...]

The domainmodel.ui plugin requires the domainmodel plugin:

Manifest-Version: 1.0
Bundle-ManifestVersion: 2
Bundle-Name: Xtext Domainmodel Example UI
Bundle-Vendor: Eclipse Modeling Project
Bundle-Version: 2.2.0.qualifier
Bundle-SymbolicName: org.eclipse.xtext.example.domainmodel.ui; singleton:=true
Bundle-ActivationPolicy: lazy
Require-Bundle: org.eclipse.xtext.example.domainmodel;bundle-version="2.0.0",
[...]

Is that what you mean by adding it to the classpath?

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Re: [Xtend2] Problem Creating JvmTypeReference to Existing Classes [message #758612 is a reply to message #758610]

Wed, 23 November 2011 21:32

Christian Dietrich

Messages: 13770
Registered: July 2009

Senior Member

Hi,

as you have to add xbase.lib to the classpath of the project the model file is contained you have to add the plugin that contains your IEntity as well

~Christian

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