Edson, am getting the following output [ b, a ] [ a, b ] only the order of the output is different. so if i check a equal to b according to the cross product law the then part execute 2 times? thats y i check the reference in the then part. how to use eval to variable comparison of objects in a single line Thanks and regs, Basha ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// Message: 3 Date: Sat, 19 May 2007 09:53:29 -0300 From: "Edson Tirelli" <tirelli(a)post.com&gt; Subject: Re: [rules-users] [rule-users]how to create object properties in single stmnt To: "Rules Users List" <rules-users(a)lists.jboss.org&gt; Message-ID: <e6dd5ba30705190553p1f5f794ct91ad250fb1ad3753(a)mail.gmail.com&gt; Content-Type: text/plain; charset="iso-8859-1" Sikkandar, In 3.0.6, if you have 2 strings in the working memory ("a" and "b" ) and you write: rule "cross product" when $s1: String() $s2: String() then System.out.println("[ "+$s1+", "+$s2+" ]"); end The result MUST be: [ a, b ] [ b, a ] If it is not that, then we have a bug, but our integration tests that test this specific situation are working fine. Plz let us know if it is different for you. In 4.0, the result must be: [ a, b ] [ b, a ] [ a, a ] [ b, b ] So a fact (by default) may match multiple simultaneous patterns. Regarding your second question, comparing properties of the same object is also something we added for 4.0. In 3.0.x you need eval() too. []s Edson 2007/5/19, Sikkandar Nawabjan <Sikkandar.Nawabjan(a)ustri.com&gt;: > > Hi , > The very reason i used to compare two object reference is that i got then > executed multiple time when i do duplicate check between object properties. > so i beleive the pattern match happen more than a time > for example > when > $obj1:object($code:code,$stdate:startdate); > $obj2:object(code==$code,startdate=$stdate); > then > if(obj1!=obj2) > System.out.println("Fired"); > > My questions are > > 1) In 3.0.6 is there any other way to avoid this multiple check other than > using eval(which affects performance i beleive). i can't use this operator > in 3.0.6 > > 2) related to this i have one more query. how to check properties within > the object itself > > for example i want to do > when > $obj1:object($code:code,$stdate:startdate,$enddate:enddate > $stdate, > reasoncode == $code); > then > System.out.println("Fired"); > i beleive the above throws error in 3.0.6 (nullpointer related to alpha > node) > > Earlier reply is highly appreciated > > Thanks and Regs, > Bassha > > _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users