[rules-users] Help Problem with kind of minimization

Hi, I’m a new user of JBossRules, and I have difficulties to solve a problem using jBossRules. I have two classes (AClass.java & Bclass.java). Each one have a number (an "int" value (AClass.getNum() & BClass.getNum()) , and I want to extract a Aclass & a Bclass witch have the closest numbers. In fact I want to minimize the value: Math.abs(AClass.getNum() - BClass.getNum()). I tried to write a rule like this: rule "My rule" when ACl : Agent ($AClNum : num , $AClNom : nom) BCl : Poste ($BClNum : num , $BClNom : nom) BCl2 : Poste () not Agent($ACl2Num : num -> (Aminor(CalculAbsolue($ACl2Num.intValue(),BCl2.getNum()) , CalculAbsolue($AClNum.intValue(),$BClNum.intValue()) ))) then System.out.println("Selected : "+ ACl.getName() +" "+BCl.getName()+" diff: "+ CalculAbsolue(ACl.getNum(),BCl.getNum())); retract(ACl); retract(BCl); end function int CalculAbsolue(int a, int b){ return Math.abs(b-a); } function boolean Aminor(int a, int b){ return a < b; } --> But the rule doesn't work. Does anyone have an idea to solve my problem? Thank you very much for your help. Olivier Lafon PS : (excuse my English, I’m French) _________________________________________________________________ Exprimez-vous : créez la page d'accueil qui vous ressemble avec Live.com. http://www.live.com/getstarted