how to use type annotations in xtext?

Question

How can I add a field like the following using the JvmModelInferrer?

public final @IdInstance long id;

What I already have is this:

members += domainId.toField('id', Long.TYPE.typeRef()) [
    visibility = JvmVisibility.PUBLIC
    final = true
]

which produces this java code:

public final long id;

But I cannot figure out how to add the IdInstance annotation to the type.

Note: adding the annotation to the field works, but is not what I want:

members += domainId.toField('id', Long.TYPE.typeRef()) [
    visibility = JvmVisibility.PUBLIC
    final = true
    annotations += 'com.tmtron.dscontrol2.qual.IdInstance'.annotationRef()
]

produces:

@IdInstance
public final long id;

Answer 1

xbase does not support type annotations yet: see xtext#218

But there is an easy way to generate what we want:

JvmTypeReferenceBuilder.typeRef('@IdInstance long')

This will create a JvmUnknownTypeReference which just writes the provided string literally to the output (so make sure to get the imports right or use the fully qualified annotation).