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: [EMAIL PROTECTED] [mailto:rules-users-
[EMAIL PROTECTED] 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 < [EMAIL PROTECTED]>:
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: [EMAIL PROTECTED] [mailto: rules-users-
[EMAIL PROTECTED] 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 < [EMAIL PROTECTED]>:
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
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Office: +55 11 3529-6000
Mobile: +55 11 9287-5646
JBoss, a division of Red Hat @ www.jboss.com
_______________________________________________
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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
[email protected]
https://lists.jboss.org/mailman/listinfo/rules-users
Felipe Piccolini M.
[EMAIL PROTECTED]
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