[rules-users] count with nested condition

[Edson Tirelli]

    What about:

Number( intValue > 1 ) from accumulate(
        LabEvent( eval( dateWithinLastMonths(effectiveTime,1)), results :
laboratoryResult ) and
        LabResult( value > 1.8 ) from results,
        count( 1 ) )

   Accumulate supports multiple patterns and has the count() function.

   Try it out and let us know.

   []s
   Edson

2008/7/29 Yoni Mazar <y.mazar at gmail.com>

>
> Hi all,
>
> Our object deals with the clinical domain. We have a class LabEvent that
> represents a visit in the laboratory. Each event is associated (using the
> laboratoryResult association) with one or more LabResult objects
> (children),
> each represents the results of a particular test.
> in the rule LHS we want to express the following condition:
> "At least two LabEvents in the last month, with a LabResult with value
> greater than 1.8"
> of note, the application asserts the LabEvent objects to the workingMemory.
>
> in DRL we tried to write it as:
> ArrayList(size>1) from collect(
> LabEvent(eval( dateWithinLastMonths(effectiveTime,1)),
> results:laboratoryResult)
> LabResult( value >1.8) from results)
>
> Of course, the problem is that collect expects a single pattern...
>
> Does anyone has a simple idea how to express this business logic?
>
> Thanks, Yoni
> --
> View this message in context:
> http://www.nabble.com/count-with-nested-condition-tp18710506p18710506.html
> Sent from the drools - user mailing list archive at Nabble.com.
>
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-- 
Edson Tirelli
JBoss Drools Core Development
JBoss, a division of Red Hat @ www.jboss.com
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