[rules-users] RE: Duplicate check using dialect

Edson, As you said i used inline eval. But am getting erroe message like this can't be used in static context.am using statelesssession to assert my objects. i also put eval(this!=obj1) as follows. $obj1:Object1($id:id,$name:name) $obj2:Object1(id==$id,$name:name==$name, eval( this!=$obj1 )) eval($obj2!= $obj1) Though my references are different the rule is not firing Thanks and Regs Basha From: rules-users-bounces(a)lists.jboss.org on behalf of Edson Tirelli Sent: Tue 11/13/2007 9:35 PM To: Rules Users List Subject: Re: [rules-users] RE: how to find duplicate Sikkandar, The only way to check for identity is to use an inline eval and use java code to check that: when $obj1:Object1($id:id,$name:name) $obj2:Object1(id==$id,$name:name==$name, eval( this!=$obj1 )) then Another option is to configure your rulebase to not allow the same object to be matched by more than one pattern in your rules. To do that you can either set a system property: drools.removeIdentities = true Or you can use drools API: RuleBaseConfiguration conf = new RuleBaseConfiguration(); conf.setRemoveIdentities( true ); RuleBase rulebase = RuleBaseFactory.newRuleBase( conf ); If you do that, your rule can be written as this: when $obj1:Object1($id:id,$name:name) $obj2:Object1(id==$id,$name:name==$name) then Since the engine will never allow the same fact to simultaneously match both patterns. []s Edson