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Mixing an xtext DSL with Java [message #489776]

Mon, 05 October 2009 21:20

Eclipse User

Originally posted by: nomail.email.com

Hi,

I'm new to xtext, I've just spent a few hours playing with grammars and
for now I'm very pleased with it, it's a very neat tool that makes
creating your DSL very easy.

That being said, I'm a bit stuck with my last twisted idea : having a
dsl where you can write java code at some places, maybe by reusing the JDT.

For example something like this :

StateMachine(
State one( do{/* some java code here */}, call(two) )
State two( ... )
)

Do you think my idea is impossible? really hard to implement? or does
xtext already provides some facilities to do this kind of things?

Thanks

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Re: Mixing an xtext DSL with Java [message #489779 is a reply to message #489776]

Mon, 05 October 2009 21:30

Sven Efftinge

Messages: 1823
Registered: July 2009

Senior Member

Jeremy Lavean schrieb:
> Hi,
>
> I'm new to xtext, I've just spent a few hours playing with grammars and
> for now I'm very pleased with it, it's a very neat tool that makes
> creating your DSL very easy.
>
> That being said, I'm a bit stuck with my last twisted idea : having a
> dsl where you can write java code at some places, maybe by reusing the JDT.
>
> For example something like this :
>
> StateMachine(
> State one( do{/* some java code here */}, call(two) )
> State two( ... )
> )
>
> Do you think my idea is impossible? really hard to implement? or does
> xtext already provides some facilities to do this kind of things?

I think the simplest way to do this is to implement Java (at least
statements and expressions) in Xtext and then inherit from that grammar.
Actually, we plan to ship something like that. We call it the base
language. But it won't be Java :-)

Also note that we are working an a Java - EMF bridge which allows for
referencing Java elements from within any Xtext language.

Cheers,
Sven

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

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Re: Mixing an xtext DSL with Java [message #489832 is a reply to message #489776]

Tue, 06 October 2009 07:53

Steven Derrien

Messages: 50
Registered: July 2009

Member

Hi,

I believe that the EMFText project provides what you need. It looks very
promising, but there is very little documentation.

http://www.emftext.org/index.php/EMFText

Steven

Jeremy Lavean a écrit :
> Hi,
>
> I'm new to xtext, I've just spent a few hours playing with grammars and
> for now I'm very pleased with it, it's a very neat tool that makes
> creating your DSL very easy.
>
> That being said, I'm a bit stuck with my last twisted idea : having a
> dsl where you can write java code at some places, maybe by reusing the JDT.
>
> For example something like this :
>
> StateMachine(
> State one( do{/* some java code here */}, call(two) )
> State two( ... )
> )
>
> Do you think my idea is impossible? really hard to implement? or does
> xtext already provides some facilities to do this kind of things?
>
> Thanks

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