Re: [rules-users] Nested properties and memberOf

Hi Dave, I tried the null-safe navigation as below, rule "Check debtor account number exists" salience 1 when $c : CreditTransferTransactionInformation10(dbtrAcct.?id.?othr.?id not memberOf accountNumbers) eval(!accountNumbers.contains($accountNumber)) then System.err.println($c.getInternalInfo().getStatus()); System.err.println("Rule 2 executed"); end I get the error [29,57]: [ERR 102] Line 29:57 mismatched input '?' expecting 'identifier' in rule "Check debtor account number exists" in pattern CreditTransferTransactionInformation10 [29,61]: [ERR 102] Line 29:61 mismatched input '?' expecting 'identifier' in rule "Check debtor account number exists" in pattern CreditTransferTransactionInformation10 [29,67]: [ERR 102] Line 29:67 mismatched input '?' expecting 'identifier' in rule "Check debtor account number exists" in pattern CreditTransferTransactionInformation10 Thanks Meeraj On Fri, Jul 16, 2010 at 5:04 PM, Meeraj Kunnumpurath < mkunnumpurath(a)googlemail.com&gt; wrote: > 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 >> >> > _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users