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EClass from Ecore model in xtext runtime editor [message #676990]

Tue, 07 June 2011 07:50

Markus Schindler

Messages: 30
Registered: July 2009

Member

Hi,

As far as I know, Xtext offers the possibility, to import ecore models to use in the DSL. At runtime I can now use EOBjects of the ecore model in the DSL.

In my case I would like to use the EClass(es) (not the EObject Instances of these) at runtime in my DSL.
For example:
In my ecore model I define a EClass Book and Author.
In my dsl (runtime) I would like to use Book and Author (with content assist), and NOT "Dan Brown" and "The Da Vinci Code"

Any hints to do this?

Regards,
Markus

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Re: EClass from Ecore model in xtext runtime editor [message #677001 is a reply to message #676990]

Tue, 07 June 2011 09:30

Christian Dietrich

Messages: 14665
Registered: July 2009

Senior Member

Hi,

simply import "http://www.eclipse.org/emf/2002/Ecore" as ecore and reference to a ecore::EClass. at runtime the .ecore simply has to be on the path of the model project.

~Christian

Twitter : @chrdietrich
Blog : https://www.dietrich-it.de

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Re: EClass from Ecore model in xtext runtime editor [message #677023 is a reply to message #677001]

Tue, 07 June 2011 10:47

Markus Schindler

Messages: 30
Registered: July 2009

Member

Hi Christian,

Thanks a lot for your reply!
One question further, can I do some kind of restrictions on which ecore model, EClass(es) etc.?

Best regards,
Markus (from Stuttgart to Stuttgart ;-)

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Re: EClass from Ecore model in xtext runtime editor [message #677032 is a reply to message #677023]

Tue, 07 June 2011 11:20

Christian Dietrich

Messages: 14665
Registered: July 2009

Senior Member

Hi,

no by default it takes all Eclasses from the index. of Course you could write a local scoping method the just adds the Eclasses you want explicitely.

~Christian

Twitter : @chrdietrich
Blog : https://www.dietrich-it.de

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Re: EClass from Ecore model in xtext runtime editor [message #677034 is a reply to message #677023]

Tue, 07 June 2011 11:22

Alexander Nittka

Messages: 1193
Registered: July 2009

Senior Member

Hi,

here the short answer:

The quick way is via adapting the scoping (see documentation and about every 5th thread in this forum), but we do not recommend that (the user gets "could not resolve reference"-Errors for elements that if fact exist).

We recommend adapting validation (checking whether the referenced object is allowed to be referenced) and content assist (e.g. by using a filter in the resolveCrossReference method).

Alex

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Re: EClass from Ecore model in xtext runtime editor [message #677081 is a reply to message #677023]

Tue, 07 June 2011 14:10

Lorenzo Bettini

Messages: 1812
Registered: July 2009
Location: Firenze, Italy

Senior Member

On 06/07/2011 12:47 PM, Markus Schindler wrote:
> Hi Christian,
>
> Thanks a lot for your reply!
> One question further, can I do some kind of restrictions on which ecore
> model, EClass(es) etc.?
>
> Best regards,
> Markus (from Stuttgart to Stuttgart ;-)
>
>

Hi Markus

I've used EClasses from an ecore imported explicitly in my DSL in this
project

http://xtypes.sourceforge.net/

then the scoping will take care of filtering only the EClasses of the
imported ecore file

hope this (and the sources :) helps
cheers
Lore

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