Eclipse Community Forums: TMF (Xtext) » Nested annotations using XbaseWithAnnotations

Home » Modeling » TMF (Xtext) » Nested annotations using XbaseWithAnnotations(How can I use nested annotations with XbaseWithAnnotations?)

Show: Today's Messages :: Show Polls :: Message Navigator

Nested annotations using XbaseWithAnnotations [message #1089802]

Mon, 19 August 2013 09:04

Michel de Blok

Messages: 8
Registered: August 2013

Junior Member

Hi all,

I am using a grammar that extends XbaseWithAnnotations and several parser rules contain the folowing definition:

annotations+=XAnnotation*

Which allows me to use Java Bean Validation annotations on my entities, e.g:

@javax.validation.constraints.AssertFalse

This works fine, but how can I specify multiple nested annotations within an annotation using XbaseWithAnnotations?

e.g. I can do this:

@AssertFalse.List(@AssertFalse)

which is accepted by the DSL editor and translates to Java perfectly. But if I try to specify multiple nested annotations, similar to the following:

@AssertFalse.List(@AssertFalse, @AssertFalse)
@AssertFalse.List({ @AssertFalse, @AssertFalse })
@AssertFalse.List(#{ @AssertFalse, @AssertFalse })

then the DSL editor always complains about mismatched input.

What is the correct syntax to specify multiple nested annotations with Xbase?
Or is it not (yet) possible to define such constructs?

NOTE: I know my example isn't functionally very usable, but I used it for simplicity. A more common use case is e.g. the @JoinColumns annotation in JPA.

Report message to a moderator

Re: Nested annotations using XbaseWithAnnotations [message #1090629 is a reply to message #1089802]

Tue, 20 August 2013 12:22

Jan Koehnlein

Messages: 760
Registered: July 2009
Location: Hamburg

Senior Member

Did you try
@AssertFalse.List(#[ @AssertFalse, @AssertFalse])

Am 19.08.13 16:14, schrieb Michel de Blok:
> Hi all,
>
> I am using a grammar that extends XbaseWithAnnotations and several
> parser rules contain the folowing definition:
>
> annotations+=XAnnotation*
>
> Which allows me to use Java Bean Validation annotations on my entities,
> e.g:
>
> @javax.validation.constraints.AssertFalse
>
> This works fine, but how can I specify multiple nested annotations
> within an annotation using XbaseWithAnnotations?
>
> e.g. I can do this:
>
> @AssertFalse.List(@AssertFalse)
>
> which is accepted by the DSL editor and translates to Java perfectly.
> But if I try to specify multiple nested annotations, similar to the
> following:
>
>
> @AssertFalse.List(@AssertFalse, @AssertFalse)
> @AssertFalse.List({ @AssertFalse, @AssertFalse })
> @AssertFalse.List(#{ @AssertFalse, @AssertFalse })
>
>
> then the DSL editor always complains about mismatched input.
>
> What is the correct syntax to specify multiple nested annotations with
> Xbase?
> Or is it not (yet) possible to define such constructs?
>
>
> NOTE: I know my example isn't functionally very usable, but I used it
> for simplicity. A more common use case is e.g. the @JoinColumns
> annotation in JPA.
>

--
Need professional support for Eclipse Modeling?
Go visit: http://xtext.itemis.com

---
Get professional support from the Xtext committers at www.typefox.io

Report message to a moderator