[rules-users] return value restriction: not all expressions supported?

[Wolfgang Laun]

Java.
-W

On 16 December 2010 16:43, Edson Tirelli <ed.tirelli at gmail.com> wrote:

>   MVEL or Java?
>
>   Edson
>
> 2010/12/16 Wolfgang Laun <wolfgang.laun at gmail.com>:
> > 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
> >
> >
> > _______________________________________________
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> > rules-users at lists.jboss.org
> > https://lists.jboss.org/mailman/listinfo/rules-users
> >
> >
>
>
>
> --
>   Edson Tirelli
>   JBoss Drools Core Development
>   JBoss by Red Hat @ www.jboss.com
>
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>
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