You cannot create variables on the Left Hand Side; there you can only bind (!)
variable names (!) to matched facts or their attributes.
-W

On 9 November 2011 15:14, elsdestickere <elsdestickere@yahoo.com> wrote:

Hi,

I'm confused about when en where to use Java or MVEL in a rule.
In the example below I want to replace "
openRes.getMasterExemplaar().getBruikbareExemplaren()" with a variable.
RHD: works with JAva expression:
List<Exemplaar> bruikEx =
openRes.getMasterExemplaar().getBruikbareExemplaren();
but I prefer to create the variable in the LHS, but Java doesn't work here.
Should this be a MVEL expression or should JAVA allways be possible?

rule "GarandeerReservaties"
when
garRes : GarandeerReservatieTaak();
openRes : Reservatie() from
repFact.getReservatieRepository().findVandaagOpenstaandeReservaties();
List<Exemplaar> bruikEx
=openRes.getMasterExemplaar().getBruikbareExemplaren();
eval(Reservatie.getVandaagOpenstaandeReservaties().size() > 0 &&
openRes.getMasterExemplaar().getBruikbareExemplaren().size() != 0)
then
//List<Exemplaar> bruikEx =
openRes.getMasterExemplaar().getBruikbareExemplaren();
bruikEx.get(0).setStatus(ExemplaarStatus.MOMENTEEL_GERESERVEERD);
openRes.setStatus(ReservatieStatus.GEGARANDEERD);
System.out.println( "Drools "+drools.getRule().getName()+": ocr:
"+openRes.getAantalVandaagOpenstaandeConcurReservaties() + " bruikex: "
+bruikEx.size() );
end
(written in Dutch, but I think it will be ok to understand)
br,
Els

--
View this message in context: http://drools.46999.n3.nabble.com/variables-confusion-Java-MVEL-tp3493632p3493632.html
Sent from the Drools: User forum mailing list archive at Nabble.com.
_______________________________________________
rules-users mailing list
rules-users@lists.jboss.org
https://lists.jboss.org/mailman/listinfo/rules-users