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(a)citizensfla.com&gt;: 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(a)lists.jboss.org [mailto:rules-users- bounces(a)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(a)citizensfla.com&gt;: 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(a)lists.jboss.org [mailto: rules-users- bounces(a)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(a)citizensfla.com&gt;: 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, _______________________________________________ rules-users mailing list rules-users(a)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(a)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(a)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(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users

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(a)lists.jboss.org [ mailto:rules-users-bounces@lists.jboss.org<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(a)citizensfla.com&gt;: 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(a)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(a)citizensfla.com&gt;: 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, _______________________________________________ rules-users mailing list rules-users(a)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(a)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(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users *Felipe Piccolini M.* felipe.piccolini(a)bluesoft.cl _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users