Re: [rules-users] Please help - losing hair

in theory for nested accessors it should switch to the MVEL dialect automatically. You only need to specify the MVEL dialect explicitely for eval, return value and consequences. Mark Manjax23 wrote: > I think you should use dialect "mvel" when accessing the nested accessors. > and I had some trouble with "mvel" dialect in 4M2 release. > > Please let me know if it works for you.. > > Thanks, > Manjax23 > > > Richard Hoberman wrote: > >> I'm using Drools 4 (M2), which is supposed to support nested accessors* >> >> This works: when Claim( submissionInfo == null), but not this: when >> Claim( submissionInfo.date == null) >> >> Rule file, SubmissionInfo.java and exception are below. >> >> What am I missing? >> >> Richard >> >> >> >> >> * See >> http://article.gmane.org/gmane.comp.java.drools.user/8079/match=nested+pr..., >> which states "Support to nested accessors, property navigation and >> simplified collection, arrays and maps syntax" >> >> Rule File >> >> --------------------------------------------------------------------------------------- >> package mvanamibia.claim; >> >> import java.lang.Object; >> import java.lang.String; >> import java.lang.Double; >> import java.util.Date; >> import java.util.List; >> import java.util.ArrayList; >> import com.sadalbari.mvanamibia.beans.Claim; >> import com.sadalbari.mvanamibia.beans.Mandate; >> import com.sadalbari.mvanamibia.beans.SubmissionInfo; >> import com.sadalbari.mvanamibia.inspector.ClaimEvaluation; >> >> global ClaimEvaluation evaluation; >> >> rule "hasDateReceived" >> >> when >> Claim( submissionInfo.date == null ) >> then >> evaluation.getFailures().add("missing: date received"); >> end >> >> ----------------------------------------------------------------------------------- >> >> Exception >> ----------------------------------------------------------------------------------- >> org.drools.rule.InvalidRulePackage: [19,23]: unknown:19:23 mismatched >> token: [@137,471:471='.',<69>,19:23]; expecting type RIGHT_PAREN >> at org.drools.rule.Package.checkValidity(Package.java:368) >> at >> org.drools.common.AbstractRuleBase.addPackage(AbstractRuleBase.java:250) >> at >> com.sadalbari.mvanamibia.model.UnregisteredClaimValidationTest.setupWorkingMemory(UnregisteredClaimValidationTest.java:33) >> at >> com.sadalbari.mvanamibia.model.UnregisteredClaimValidationTest.testMandateClaim(UnregisteredClaimValidationTest.java:56) >> ... Removed 22 stack frames >> FAILED: testEmptyClaim >> org.drools.rule.InvalidRulePackage: [19,23]: unknown:19:23 mismatched >> token: [@137,471:471='.',<69>,19:23]; expecting type RIGHT_PAREN >> at org.drools.rule.Package.checkValidity(Package.java:368) >> at >> org.drools.common.AbstractRuleBase.addPackage(AbstractRuleBase.java:250) >> at >> com.sadalbari.mvanamibia.model.UnregisteredClaimValidationTest.setupWorkingMemory(UnregisteredClaimValidationTest.java:33) >> at >> com.sadalbari.mvanamibia.model.UnregisteredClaimValidationTest.testEmptyClaim(UnregisteredClaimValidationTest.java:42) >> ... Removed 22 stack frames >> >> >> ------------------------------------------------------ >> SubmissionInfo (relevant bits) >> >> public class SubmissionInfo implements Serializable { >> >> private Date date; >> >> public Date getDate() { >> return date; >> } >> >> public void setDate(Date date) { >> this.date = date; >> } >> >> >> _______________________________________________ >> 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