Re: [rules-users] list operations in "then" part

Can I maybe do a for loop in the "then" part? Is there a documentation regarding what is possible/impossible in the "then" part? Thanks. -Simon On Fri, Jun 3, 2011 at 3:23 PM, Simon Chen <simonchennj(a)gmail.com&gt; wrote: > No, this doesn't work... > > Drools-5.2 doesn't help either :-( > > 2011/6/2 Joe White <Joe.White(a)recondotech.com&gt;: >> If you cast $b on the RHS it will probably work. We’ve had to do this in the >> past for rules like this. >> >> >> >> …. >> >> then: >> Test fact = new Test(); >> >> Book rhsBook = (Book)$b; >> fact.getList().addAll( rhsBook.authors ); >> insert(fact); >> end >> >> >> >> >> >> From: rules-users-bounces(a)lists.jboss.org >> [mailto:rules-users-bounces@lists.jboss.org] On Behalf Of Mark Proctor >> Sent: Thursday, June 02, 2011 8:52 AM >> To: rules-users(a)lists.jboss.org >> Subject: Re: [rules-users] list operations in "then" part >> >> >> >> On 02/06/2011 08:14, Wolfgang Laun wrote: >> >> On 1 June 2011 21:43, Simon Chen <simonchennj(a)gmail.com&gt; wrote: >> >> Hi all, >> >> I am always confused about what we can do in the "then" part of the rule. >> >> In particular, I have problem duplicate a list. For example: >> >> when: >> $b: Book( "james" memberOf authors ) >> then: >> Test fact = new Test(); >> fact.getList().addAll( $b.authors ); >> insert(fact); >> end >> >> The error message reads like this: >> >> BuildError: Unable to build expression for 'consequence': [Error: >> Failed to compile: 2 compilation error(s): >> - (1,7) unqualified type in strict mode for: $b >> - (1,12) unqualified type in strict mode for: authors] >> >> What is the right way to do this? >> >> Granted - the error message is a puzzle in itself, but basically, the RHS >> must be written according to Java rules. Hence, if $b is an object of type >> Book, $b.authors depends on the (Java!) visibility of member authors. If it >> isn't public, you must use the getter. >> >> I believe he's using "mvel" judging by the error. >> >> mark >> >> >> -W >> >> >> Thanks. >> -Simon >> _______________________________________________ >> rules-users mailing list >> rules-users(a)lists.jboss.org >> https://lists.jboss.org/mailman/listinfo/rules-users >> >> >> >> >> >> _______________________________________________ >> >> rules-users mailing list >> >> rules-users(a)lists.jboss.org >> >> https://lists.jboss.org/mailman/listinfo/rules-users >> >> >> >> _______________________________________________ >> rules-users mailing list >> rules-users(a)lists.jboss.org >> https://lists.jboss.org/mailman/listinfo/rules-users >> >> > _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users