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Xtext DSL used as a Java Scripting Engine language [message #1245291]

Thu, 13 February 2014 15:35

claudio rosati

Messages: 5
Registered: June 2013

Junior Member

Hi everybody,
I working on an "assessment builder" and I need to store in certain cases some rules to auto-answer to questions (Ex. the simplest one is to answer with the current year or date). The rule would be stored on a db table.

My first choice was to write the rule in "javascript" and run it via java ScriptingEngine. But...

I'm starting to use xtext to build a rule language for another module of the same application so I'm guessing if it's possible to use the same new "DSL" as a ScriptingEngine language instead of Javascript.

Thanks,
Claudio

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Re: Xtext DSL used as a Java Scripting Engine language [message #1245744 is a reply to message #1245291]

Fri, 14 February 2014 07:32

Uli Merkel

Messages: 248
Registered: June 2013

Senior Member

what about extending your DSL so it covers the complete assesment builder?

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Re: Xtext DSL used as a Java Scripting Engine language [message #1249875 is a reply to message #1245744]

Tue, 18 February 2014 18:27

claudio rosati

Messages: 5
Registered: June 2013

Junior Member

Uli Merkel wrote on Fri, 14 February 2014 02:32

what about extending your DSL so it covers the complete assesment builder?

This is somenthing we were tempted to do but finally there were other interaction (with other applications) that brought us to the decision of a old "db configuration".

So at the moment we have to configure the rules onto db columns and they have to be executed at runtime (depending on client answers on the assesment).

Thanks,
Claudio

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Re: Xtext DSL used as a Java Scripting Engine language [message #1250792 is a reply to message #1245291]

Wed, 19 February 2014 16:04

Sven Efftinge

Messages: 1823
Registered: July 2009

Senior Member

Am 13/02/14 16:35, schrieb claudio rosati:

> I'm starting to use xtext to build a rule language for another module of
> the same application so I'm guessing if it's possible to use the same
> new "DSL" as a ScriptingEngine language instead of Javascript.

Sure, all you need to have is an interpreter for your rules.
A simple exmaple for an interpreter is included within the simple
arithmetics example. A more advanced one is shipped with Xbase.

Sven

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