[rules-users] variables confusion Java/MVEL

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-tp3493632... Sent from the Drools: User forum mailing list archive at Nabble.com.