Using 5.1.1 and knowing that "a Return Value restriction is a parenthesized expression composed from literals, any valid Java primitive or object, previously bound variables, function calls, and operators" I wrote   OperatorOrder( $code: code, $id1: elId1, $id2: elId2 )   CommandCode( code == $code, operands != ( $id1!=null ? ($id2!=null ? 2 : 1) : 0 ) ) and got the erroneous error message:    Rule Compilation error : [Rule name='operator command: invalid number of elements'] appl/domain/element/Rule_operator_command__invalid_number_of_elements_0.java (9:714) : $id2 cannot be resolved Variations in the return value restriction show that it is the nesting of -?-:- which causes the bug; a similar (but not equivalent) expression    operands != ( ($id1!=null ? 1:0) + ($id2!=null ? 1:0) ) is accepted. -W _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users

Java. -W On 16 December 2010 16:43, Edson Tirelli <ed.tirelli(a)gmail.com&gt; wrote: > >   MVEL or Java? > >   Edson > > 2010/12/16 Wolfgang Laun <wolfgang.laun(a)gmail.com&gt;: > > Using 5.1.1 and knowing that "a Return Value restriction is a > > parenthesized > > expression composed from literals, any valid Java primitive or object, > > previously bound variables, function calls, and operators" I wrote > > > >   OperatorOrder( $code: code, $id1: elId1, $id2: elId2 ) > >   CommandCode( code == $code, operands != ( $id1!=null ? ($id2!=null ? 2 > > : > > 1) : 0 ) ) > > > > and got the erroneous error message: > >    Rule Compilation error : [Rule name='operator command: invalid number > > of > > elements'] > > > > > > appl/domain/element/Rule_operator_command__invalid_number_of_elements_0.java > > (9:714) : $id2 cannot be resolved > > > > Variations in the return value restriction show that it is the nesting > > of > > -?-:- which causes the bug; a similar (but not equivalent) expression > > > >    operands != ( ($id1!=null ? 1:0) + ($id2!=null ? 1:0) ) > > > > is accepted. > > -W > > > > > > _______________________________________________ > > rules-users mailing list > > rules-users(a)lists.jboss.org > > https://lists.jboss.org/mailman/listinfo/rules-users > > > > > > > > -- >   Edson Tirelli >   JBoss Drools Core Development >   JBoss by Red Hat @ www.jboss.com > > _______________________________________________ > 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