Hi, Yes, it should work. I am pretty sure I used it before. Can you please confirm what versions of Drools and MVEL are you using? Edson 2009/11/12 Zohar Etzioni <zohar.etzioni(a)gmail.com&gt; -- Edson Tirelli JBoss Drools Core Development JBoss by Red Hat @ www.jboss.com

If you are checking for class in the LHS would it not be better to define a separate rule for the subclass? I assume you're doing something like:- rule "current" when MyClass(class == MySubClassOfMyClass.class) then //Something specific to the subclass end When something like this might be more suited? rule "super" when MyClass() then //Do generic stuff end rule "sub" when MySubClassOfMyClass() then //Do something more specific end I don't know whether this would cause two activations or whether the more generic would swallow the Fact in the first ObjectType node in the RETE network; Edson? ________________________________ From: rules-users-bounces(a)lists.jboss.org [mailto:rules-users-bounces@lists.jboss.org] On Behalf Of Wolfgang Laun Sent: 12 November 2009 16:48 To: Rules Users List Subject: Re: [rules-users] Java beans inheritance Are you using MVEL at all in this rule? Anyway, better would be class == SomeClass.class which avoids string handling. -W On Thu, Nov 12, 2009 at 3:25 PM, Zohar Etzioni <zohar.etzioni(a)gmail.com&gt; wrote: Hi, I have a class hierarchy of objects that I'm inserting as facts. Lets say X, Y extends X and Z extends Y. I have a rule that is defined on X and therefore applies to all of them, however in the rule I want to ask about the class name and I'm referring to it as class.name=="some.class". This should work as far as I understand coz it keeps the java beans format, however it is not directly defined in the class X but rather in Object. The error I'm getting is "Error: could not access: name". Any idea what I'm doing wrong? Thanks, Dawg _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users