[rules-users] explanation on drl usage

Hi all, i'm quiet new in drools (a french speaking so i appologise for my english mistakes) and i'm surprise by the folowing problem in drools example i found this code ... Example 3.14. Return Value operator Person( girlAge : age, sex == "F" ) Person( age == ( new Integer(girlAge.intValue() + 2) ), sex == 'M' ) This let me think that i can use method of an assigned variable in the equality test this my rule file package be.labocollard.server.rules ; import java.lang.Integer; import java.lang.Double; import be.labocollard.server.types.HumanSexType; import be.labocollard.server.entities.Result; import be.labocollard.server.entities.Resultat; import be.labocollard.server.entities.Prestation; import be.labocollard.server.entities.PrestationFacturable; import be.labocollard.server.entities.Utilisateur; rule "asserteResultatAndPrestation" when PrestationFacturable ( $resultat : resultat , $prestation : prestation) then assert ( $resultat ); assert ($prestation); end rule "findRelevantResult" when $resultat : Resultat() eval($resultat.getResults().size()>0) then assert($resultat.getResults().iterator().next()); end rule "testPsaId" when $prestation : Prestation(id == "psaId") $prestationFacturable : PrestationFacturable (prestation==$prestation, $resultat : resultat) $result : Result (doubleValue < (new Double(12))) Resultat (id == $resultat.getId(), results contains $result ) $resultat.getResults().contains($result) ) Utilisateur (age < (new Integer(55))) || Utilisateur (sex != HumanSexType.MALE) then retract($prestationFacturable); end Is there a drools guru to explain my misunderstanding ???? thanks a lot and thanks to drools developpers for those wonderfull tools JLL -- View this message in context: http://www.nabble.com/explanation-on-drl-usage-tf3535518.html#a9868635 Sent from the drools - user mailing list archive at Nabble.com.