2007/8/21, Felipe Piccolini <felipe.piccolini@bluesoft.cl>:

Edson,

What about sugar to be able to write DSLs dor this:
DLS:
      A Person
         - having age equals to 10
         - or equals to 15
         - or greather than 20

DRL:
p: Person( age == 10
               || == 15
               || > 20)

Right now, the " - <expression>" put a 'comma' at the end of the line making this:

p: Person( age == 10, || == 15, || > 20)

What throws errors...

Is it possible to do that? I love the || == <value> thing in each line...

Thanks.

On 21-08-2007, at 16:14, Saleem Lakhani wrote:

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@lists.jboss.org [mailto:rules-users-bounces@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@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@lists.jboss.org [mailto: rules-users-bounces@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@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

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rules-users mailing list
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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

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rules-users mailing list
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https://lists.jboss.org/mailman/listinfo/rules-users


Felipe Piccolini M.
felipe.piccolini@bluesoft.cl

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