Re: [rules-users] Nested properties and memberOf

Thanks Dave. I think the '||' on rule 1 is getting short-circuited. However, it is the '&&' on rule 2 that is not getting short circuited. Kind regards Meeraj 2010/7/16 David Sinclair <dsinclair(a)chariotsolutions.com&gt; Drools doesn't use short circuit evaluation, so all of those ORs are going > to be evaluated. You may want to consider re-writing your rules or you can > use MVEL's null safe navigation for this. dbtrAcct.?id == null, > dbtrAcct.?id.?othr == nulll, etc. > > dave > > > > 2010/7/16 Meeraj Kunnumpurath <mkunnumpurath(a)googlemail.com&gt; > >> Hi, >> >> I have the following rules, >> >> global java.util.Set accountNumbers; >> >> rule "rule 1" >> when >> $d : Document() >> $c : CreditTransferTransactionInformation (dbtrAcct == null || >> dbtrAcct.id == null || dbtrAcct.id.othr == null || dbtrAcct.id.othr.id== null) from $d.cstmrCdtTrfInitn.cdtTrfTxInf >> $i : InternalInfo() from $c.internalInfo >> then >> $i.setStatus(PaymentStatus.INVALID); >> $i.setErrorCode("PR002"); >> $i.setAdditionalInfo("Account number is null"); >> end >> >> rule "rule 2" >> when >> $d : Document() >> $c : CreditTransferTransactionInformation(internalInfo.status != >> PaymentStatus.INVALID && dbtrAcct.id.othr.id not memberOf >> accountNumbers) from $d.cstmrCdtTrfInitn.cdtTrfTxInf >> $i : InternalInfo() from $c.internalInfo >> then >> $i.setStatus(PaymentStatus.INVALID); >> $i.setErrorCode("PR002"); >> $i.setAdditionalInfo("Account number not available in the routing >> table"); >> end >> >> My assumption is rule 1 and rule 2 will be executed in the order they >> appear. Rule 1 checks all the nested attributes are not null and set the >> status as invalid if any of them is null. Rule 2 uses the and operator and >> checks the nested attribute is in the collection defined by the global, only >> if the object is valid. I assume the LHS of rule 2 will be short circuited >> if the object is invalid. However, if any of the nested property is null I >> get the following exception from MVEL. >> >> Caused by: [Error: unable to access property (null parent): id] >> [Near : {... Unknown ....}] >> ^ >> [Line: 1, Column: 0] >> at >> org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.getMethod(ReflectiveAccessorOptimizer.java:861) >> >> Regards >> Meeraj >> >> _______________________________________________ >> 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 > >