[rules-users] Minor Issue in writing DSL

[Edson Tirelli]

   Saleem,

   In 4.0GA, you need to bind families first:

ObjectA( $f : families, units != $f )

   We will add syntax sugar to avoid the need for bind.

   []s
   Edson

2007/8/21, Saleem Lakhani <Saleem.Lakhani at citizensfla.com>:
>
>  Thanks Edson. That helped. One more thing, can't we execute something
> simple like: ObjectA(units != families)
>
> When both units & families are defined as int in ObjectA with their public
> get and set methods. This is the exception I am receiving.
>
>
>
> org.drools.rule.InvalidRulePackage: Unable to return Declaration for
> identifier 'families' : [Rule name=Rule6, agendaGroup=Rating, salience=0,
> no-loop=false] Its even showing correctly in drl editor. If I swap the
> positions of units & families then the same exception is thrown for 'units'.
>
>
>
>
> regards,
>
> saleem
>
> -----Original Message-----
> *From:* rules-users-bounces at lists.jboss.org [mailto:
> rules-users-bounces at lists.jboss.org] *On Behalf Of *Edson Tirelli
> *Sent:* Tuesday, August 21, 2007 1:56 PM
>
> *To:* Rules Users List
> *Subject:* Re: [rules-users] Minor Issue in writing DSL
>
>
>
>
>    Saleem,
>
>    For sure, your mapping must have some typo or mistake. A rule like this
> works and is correct:
>
> rule XYZ
> when
>     ObjectA( application==true || banker==true || officer==true )
> then
>   // do something
> end
>
>     Drools does NOT inspect object fields... only public methods.
>
>     If you are using a DSL, make sure your "drl" file is named "dslr"
> (this is new in 4.0), so when you open it in eclipse, you have a tab that
> shows you the result of the DSL template processing. This way you will be
> able to see any eventual mapping mistake.
>
>     []s
>     Edson
>
>
> 2007/8/21, Saleem Lakhani < Saleem.Lakhani at citizensfla.com>:
>
> When I use the syntax below and write like:
>
>
>
> [when]ABC=ObjectA(application==true || banker==true || officer==true)
>
>
>
> on drl it gives me the following error:
>
>
>
> Multiple markers at this line:
>
> -        unknown:116:39 Unexpected token '=='
>
> -        unknown:116:25 Unexpected token '||'
>
> -        unknown:116:64 Unexpected token '=='
>
>
>
> Again, there are NO attributes in ObjectA named application, banker or
> officer.
>
>
>
> Thanks
>
>
>
>
>
>
>
> -----Original Message-----
> *From:* rules-users-bounces at lists.jboss.org [mailto:rules-users-bounces at lists.jboss.org]
> *On Behalf Of *Edson Tirelli
> *Sent:* Tuesday, August 21, 2007 9:49 AM
> *To:* Rules Users List
> *Subject:* Re: [rules-users] Minor Issue in writing DSL
>
>
>
>
>    Drools respects encapsulation, so it works with javabean method name
> conventions. If you have a method isApplication() that returns a boolean,
> does not matter how your class calculates the return value. Same for any
> other method. In 4.0, you can write:
>
> ObjectA( application == true || banker == true )
>
>    To map that as a DSL, just follow your usual procedure and syntax.
>
>    []s
>    Edson
>
> 2007/8/21, Saleem Lakhani < Saleem.Lakhani at citizensfla.com>:
>
> Hi,
>
>
>
> If I had a rule written in DSL using Drools 3.0 like;
>
>
>
> 1.      [when] when1=r : ObjectA( )
>
> 2.      [when] when2=eval(r.isApplication() || r.isBanker())
>
>
>
> There are no attributes in class Object with name application and banker
> but there are methods in ObjectA with names isApplication() & isBanker()
> which does some work and return Boolean based on some facts.
>
>
>
> What is the correct way of writing the same rule using Drools 4.0 ?
>
>
>
> Also, if the above attributes were present in ObjectA what would have been
> the best way to write it in DSL using Drools 4.0
>
>
>
> Thanks,
>
>
>
>
>
>
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>
>
>
>
> --
>   Edson Tirelli
>   Software Engineer - JBoss Rules Core Developer
>   Office: +55 11 3529-6000
>   Mobile: +55 11 9287-5646
>   JBoss, a division of Red Hat @ www.jboss.com
>
>
> _______________________________________________
> rules-users mailing list
> rules-users at lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/rules-users
>
>
>
>
> --
>   Edson Tirelli
>   Software Engineer - JBoss Rules Core Developer
>   Office: +55 11 3529-6000
>   Mobile: +55 11 9287-5646
>   JBoss, a division of Red Hat @ www.jboss.com
>
> _______________________________________________
> rules-users mailing list
> rules-users at lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/rules-users
>
>


-- 
  Edson Tirelli
  Software Engineer - JBoss Rules Core Developer
  Office: +55 11 3529-6000
  Mobile: +55 11 9287-5646
  JBoss, a division of Red Hat @ www.jboss.com
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