[rules-users] Weblogic rules to Drools rules.

[Edson Tirelli]

   Glad to hear things are moving forward!

   How do you feel about writing a quick tutorial on how to implement a
custom evaluator so that others can benefit from your experience? :) We
could post it on the blog and add to the manual with the proper credits.

   Regarding your question, "in" is a special parser syntax sugar we have in
Drools. So:

field in ("aValue", $aVariable, Some.CONSTANT)

   Is exactly the same as:

field == "aValue" || == $aVariable || == Some.CONSTANT

   So, the answer is, without patching Drools, unfortunately, it is not
possible to do the same with custom evaluators. In your case, the best I can
suggest without changing Drools parser is to have your evaluator receive all
possible values as a single String:

code codeChecker "V100-V200, 243327005, 243327005"

    So, your operator would just split the list and check all values there
as appropriate. Obviously, if you would like to submit a patch for Drools
allowing custom evaluators to accept multiple values, we would gladly apply
the patch to the code base and support it from that time forward.

    Cheers,
       Edson

2010/2/1 kashif10 <kash452 at yahoo.com>

>
> Thanks all of you!
>
> We are heading toward  the solution.
>
> i) We start putting interenal data too in WM.
> ii) For time period matching I simply write a method in Fact class, which
> calls using the exact name matching fucntionality.
> iii) For complex code matching including exact number match, Range match,
> wildcard match. I created the customEvalutor, usning new operator
> codeChecker, to handle all required scenarios,   as follows:
>
> exists (Diagnosis(name == "diag3" || ( code codeChecker "V100-V200" &&
> codeSystem == "2.16.840.1.113883.6.96" )  ))
>
>
> Ques: I need suggestion how to use my custom Evaluator codeChecker in
> following suggested OR combination using in. As you know that if we don't
> use "in" then we have to add so many ORed patterns.
>
>        exists (Diagnosis(name in ( "Vibrio abc splendidus" , "kash") || (
> code in
> ( "243327005", "243327005") && codeSystem == "2.16.840.1.113883.6.96" )  )
> )
>
>
>
> -Kash
>
> --
> View this message in context:
> http://n3.nabble.com/Weblogic-rules-to-Drools-rules-tp126265p181432.html
> Sent from the Drools - User mailing list archive at Nabble.com.
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-- 
 Edson Tirelli
 JBoss Drools Core Development
 JBoss by Red Hat @ www.jboss.com
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