[rules-users] nested accessors with Sets

[mark.mcnally at comcast.net]

My rule now appears to be working after switching from the "excludes"  operator to the newer "not contains".

This works:
    $ca:CandidateAssociation(nurseDetails.stateLicensures not contains patientDetails.state  )			

This does not:
    $ca:CandidateAssociation(nurseDetails.stateLicensures excludes  patientDetails.state  )			


Mark

 -------------- Original message ----------------------
From: mark.mcnally at comcast.net
> Hello,
> 
> Please excuse me if I have double posted - my first did not seem to appear.
> 
> I am wondering if the following is valid rule syntax. I am getting  a stacktrace 
> when the rules fire that points to a ClassCastException on a HashSet
> 
> I am using v4.0 GA. 
> 
> Thank you, Mark
> 
> 
> rule StateMatch
> 	when
> 	$ca:CandidateAssociation(nurseDetails.stateLicensures excludes 
> patientDetails.state  )			
> 	then 	
> 		retract( $ca );
> end
> 
> 
> public class CandidateAssociation {
> 	private PatientDetails patientDetails;
> 	private NurseDetails   nurseDetails;
> 	private int overlapHours;
> 
> 	public CandidateAssociation( PatientDetails patientDetails, NurseDetails 
> nurseDetails) {
> 		super();
> 		this.patientDetails = patientDetails;
> 		this.nurseDetails = nurseDetails;
> 		overlapHours = 
> participantDetails.getNumberOverlapHourCnt(nurseDetails);
> 	}
> [...]
> }
> 
> public class NurseDetails {
> 	private Set stateLicensures = new HashSet();
> 	[...]
> }
> public class PatientDetails {
> 	private String state;
> 	[...]
> }
> 
> ------------------------------------------------------
> Firing Rules 
> **********
> org.drools.RuntimeDroolsException: Exception executing predicate 
> org.drools.base.mvel.MVELPredicateExpression at 27d6bfb
> 	at 
> org.drools.rule.PredicateConstraint.isAllowed(PredicateConstraint.java:197)
> 	at org.drools.reteoo.AlphaNode.assertObject(AlphaNode.java:121)
> 	at 
> org.drools.reteoo.CompositeObjectSinkAdapter.propagateAssertObject(CompositeObje
> ctSinkAdapter.java:317)
> 	at 
> org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:159)
> 	at org.drools.reteoo.Rete.assertObject(Rete.java:175)
> 	at 
> org.drools.reteoo.ReteooRuleBase.assertObject(ReteooRuleBase.java:190)
> 	at 
> org.drools.reteoo.ReteooWorkingMemory.doInsert(ReteooWorkingMemory.java:70)
> 	at 
> org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:772)
> 	at 
> org.drools.base.DefaultKnowledgeHelper.insert(DefaultKnowledgeHelper.java:64)
> 	at 
> org.drools.base.DefaultKnowledgeHelper.insert(DefaultKnowledgeHelper.java:58)
> 	at 
> org.drools.examples.Rule_InitializeCandidateForEachNurse_0.consequence(Rule_Init
> ializeCandidateForEachNurse_0.java:13)
> 	at 
> org.drools.examples.Rule_InitializeCandidateForEachNurse_0ConsequenceInvoker.eva
> luate(Rule_InitializeCandidateForEachNurse_0ConsequenceInvoker.java:25)
> 	at 
> org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:503)
> 	at org.drools.common.DefaultAgenda.fireNextItem(DefaultAgenda.java:467)
> 	at 
> org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:
> 403)
> 	at 
> org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:
> 384)
> 	at 
> primarynursePOC.PrimaryNursePOC.selectPrimaryNurse(PrimaryNursePOC.java:136)
> 	at primarynursePOC.PrimaryNursePOC.main(PrimaryNursePOC.java:91)
> Caused by: java.lang.ClassCastException: java.util.HashSet
> 	at 
> org.drools.base.mvel.MVELPredicateExpression.evaluate(MVELPredicateExpression.ja
> va:35)
> 	at 
> org.drools.rule.PredicateConstraint.isAllowed(PredicateConstraint.java:191)
> 	... 17 more
> org.drools.RuntimeDroolsException: Exception executing predicate 
> org.drools.base.mvel.MVELPredicateExpression at 27d6bfb
> 	at 
> org.drools.rule.PredicateConstraint.isAllowed(PredicateConstraint.java:197)
> 	at org.drools.reteoo.AlphaNode.assertObject(AlphaNode.java:121)
> 	at 
> org.drools.reteoo.CompositeObjectSinkAdapter.propagateAssertObject(CompositeObje
> ctSinkAdapter.java:317)
> 	at 
> org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:159)
> 	at org.drools.reteoo.Rete.assertObject(Rete.java:175)
> 	at 
> org.drools.reteoo.ReteooRuleBase.assertObject(ReteooRuleBase.java:190)
> 	at 
> org.drools.reteoo.ReteooWorkingMemory.doInsert(ReteooWorkingMemory.java:70)
> 	at 
> org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:772)
> 	at 
> org.drools.base.DefaultKnowledgeHelper.insert(DefaultKnowledgeHelper.java:64)
> 	at 
> org.drools.base.DefaultKnowledgeHelper.insert(DefaultKnowledgeHelper.java:58)
> 	at 
> org.drools.examples.Rule_InitializeCandidateForEachNurse_0.consequence(Rule_Init
> ializeCandidateForEachNurse_0.java:13)
> 	at 
> org.drools.examples.Rule_InitializeCandidateForEachNurse_0ConsequenceInvoker.eva
> luate(Rule_InitializeCandidateForEachNurse_0ConsequenceInvoker.java:25)
> 	at 
> org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:503)
> 	at org.drools.common.DefaultAgenda.fireNextItem(DefaultAgenda.java:467)
> 	at 
> org.drools.common.AbstractWorkingMemory.doOtherwise(AbstractWorkingMemory.java:4
> 30)
> 	at 
> org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:
> 412)
> 	at 
> org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:
> 384)
> 	at 
> primarynursePOC.PrimaryNursePOC.selectPrimaryNurse(PrimaryNursePOC.java:136)
> 	at primarynursePOC.PrimaryNursePOC.main(PrimaryNursePOC.java:91)
> Caused by: java.lang.ClassCastException: java.util.HashSet
> 	at 
> org.drools.base.mvel.MVELPredicateExpression.evaluate(MVELPredicateExpression.ja
> va:35)
> 	at 
> org.drools.rule.PredicateConstraint.isAllowed(PredicateConstraint.java:191)
> 	... 18 more
> Exception in thread "main" org.drools.spi.ConsequenceException: 
> org.drools.RuntimeDroolsException: Exception executing predicate 
> org.drools.base.mvel.MVELPredicateExpression at 27d6bfb
> 	at 
> org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:507)
> 	at org.drools.common.DefaultAgenda.fireNextItem(DefaultAgenda.java:467)
> 	at 
> org.drools.common.AbstractWorkingMemory.doOtherwise(AbstractWorkingMemory.java:4
> 30)
> 	at 
> org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:
> 412)
> 	at 
> org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:
> 384)
> 	at 
> primarynursePOC.PrimaryNursePOC.selectPrimaryNurse(PrimaryNursePOC.java:136)
> 	at primarynursePOC.PrimaryNursePOC.main(PrimaryNursePOC.java:91)
> Caused by: org.drools.RuntimeDroolsException: Exception executing predicate 
> org.drools.base.mvel.MVELPredicateExpression at 27d6bfb
> 	at 
> org.drools.rule.PredicateConstraint.isAllowed(PredicateConstraint.java:197)
> 	at org.drools.reteoo.AlphaNode.assertObject(AlphaNode.java:121)
> 	at 
> org.drools.reteoo.CompositeObjectSinkAdapter.propagateAssertObject(CompositeObje
> ctSinkAdapter.java:317)
> 	at 
> org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:159)
> 	at org.drools.reteoo.Rete.assertObject(Rete.java:175)
> 	at 
> org.drools.reteoo.ReteooRuleBase.assertObject(ReteooRuleBase.java:190)
> 	at 
> org.drools.reteoo.ReteooWorkingMemory.doInsert(ReteooWorkingMemory.java:70)
> 	at 
> org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:772)
> 	at 
> org.drools.base.DefaultKnowledgeHelper.insert(DefaultKnowledgeHelper.java:64)
> 	at 
> org.drools.base.DefaultKnowledgeHelper.insert(DefaultKnowledgeHelper.java:58)
> 	at 
> org.drools.examples.Rule_InitializeCandidateForEachNurse_0.consequence(Rule_Init
> ializeCandidateForEachNurse_0.java:13)
> 	at 
> org.drools.examples.Rule_InitializeCandidateForEachNurse_0ConsequenceInvoker.eva
> luate(Rule_InitializeCandidateForEachNurse_0ConsequenceInvoker.java:25)
> 	at 
> org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:503)
> 	... 6 more
> Caused by: java.lang.ClassCastException: java.util.HashSet
> 	at 
> org.drools.base.mvel.MVELPredicateExpression.evaluate(MVELPredicateExpression.ja
> va:35)
> 	at 
> org.drools.rule.PredicateConstraint.isAllowed(PredicateConstraint.java:191)
> 	... 18 more
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