[rules-users] newbie question on "when" condition syntax

[Edson Tirelli]

   Yes, newest mvel version works fine, but that problem only happened when
using mvel dialect. For java, just do as Chris mentioned:

when
   Test( y == (x+1) )
then

   And it will work. The () is needed to tell the engine that what is inside
is a semantic code block, i.e., an expression that will return a value to be
compared to y.

   []s
   Edson



2008/5/2 Chris Woodrow <woodrow.chris at gmail.com>:

> Hi,
> even
> Test (y == (x + 1))
> works.
>
> Richard : I think you should take a look at this before planning doing
> complicated calculations with drools
> http://lists.jboss.org/pipermail/rules-users/2008-April/005247.html but it
> might be fixed now.
>
> Chris
>
>
> 2008/5/2 Raffi Khatchadourian <khatchad at cse.ohio-state.edu>:
>
> On Fri  2.May'08 at 10:05:20 +0100, Anstis, Michael (M.) wrote:
> >
> > > The "when" section matches fact (object) patterns, so your requirement
> > > could be written as:-
> > >
> > > when there is a Test Fact 'A' and another Test Fact 'B' where "the 'x'
> > > property of 'A'" equals "the 'y' property of fact 'B' plus 1"
> > > then.....
> > >
> > > This would become:-
> > >
> > > rule "Rule 1"
> > > when
> > >   Test( $y : y )
> > >   Test( x == ($y + 1) )
> > >
> >
> > Could you combine these conditions? As in:
> >
> > when
> >        Test($y : y, x == $y + 1)
> > //...
> > _______________________________________________
> > rules-users mailing list
> > rules-users at lists.jboss.org
> > https://lists.jboss.org/mailman/listinfo/rules-users
> >
>
>
> _______________________________________________
> rules-users mailing list
> rules-users at lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/rules-users
>
>


-- 
Edson Tirelli
JBoss Drools Core Development
Office: +55 11 3529-6000
Mobile: +55 11 9287-5646
JBoss, a division of Red Hat @ www.jboss.com
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.jboss.org/pipermail/rules-users/attachments/20080502/a1cbec56/attachment.html