[jboss-jira] [JBoss JIRA] Created: (JBRULES-1784) Class Cast exception when using from

[Dave Sinclair (JIRA)]

Class Cast exception when using from
------------------------------------

                 Key: JBRULES-1784
                 URL: https://jira.jboss.org/jira/browse/JBRULES-1784
             Project: JBoss Drools
          Issue Type: Bug
      Security Level: Public (Everyone can see)
    Affects Versions: 4.0.7
         Environment: Windows XP
            Reporter: Dave Sinclair
            Assignee: Mark Proctor


I have the following rule that should fire for each element in the set from $Chassis

rule 'ChassisSlotCollectionFieldWalker'
    agenda-group "Traversal"
    no-loop true    
    dialect "mvel"
when
	$Chassis : Chassis ()
        $SlotElement : Slot () from  $Chassis.slots
then
        insert($SlotElement);    
end

But whenever I insert a Chassis into memory, I get the following expcetion

Caused by: java.lang.ClassCastException: com.sungard.ams.persistence.model.objects.BladeServerSlot cannot be cast to com.sungard.ams.persistence.model
.objects.BladeChassis$$EnhancerByCGLIB$$e5aeb667
        at ASMAccessorImpl_248066451222360199260.getValue(Unknown Source)
        at org.mvel.ast.VariableDeepPropertyNode.getReducedValueAccelerated(VariableDeepPropertyNode.java:22)
        at org.mvel.ast.PropertyASTNode.getReducedValueAccelerated(PropertyASTNode.java:21)
        at org.mvel.MVELRuntime.execute(MVELRuntime.java:90)
        at org.mvel.CompiledExpression.getValue(CompiledExpression.java:111)
        at org.mvel.MVEL.executeExpression(MVEL.java:252)
        at org.drools.base.dataproviders.MVELDataProvider.getResults(MVELDataProvider.java:55)
        at org.drools.reteoo.FromNode.assertTuple(FromNode.java:68)
        at org.drools.reteoo.SingleTupleSinkAdapter.createAndPropagateAssertTuple(SingleTupleSinkAdapter.java:55)
        at org.drools.reteoo.LeftInputAdapterNode.assertObject(LeftInputAdapterNode.java:116)
        at org.drools.reteoo.CompositeObjectSinkAdapter.propagateAssertObject(CompositeObjectSinkAdapter.java:318)
        at org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:162)
        at org.drools.reteoo.Rete.assertObject(Rete.java:175)
        at org.drools.reteoo.ReteooRuleBase.assertObject(ReteooRuleBase.java:192)
        at org.drools.reteoo.ReteooWorkingMemory.doInsert(ReteooWorkingMemory.java:71)
        at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:911)
        at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:883)
        at org.drools.base.DefaultKnowledgeHelper.insert(DefaultKnowledgeHelper.java:67)
        at org.drools.base.DefaultKnowledgeHelper.insert(DefaultKnowledgeHelper.java:61)

BladeServerSlot is a subclass of Slot and is contained in a Chassis.

Here is the debug from insertion

[ObjectInserted: handle=[fid:1:1:ClassName:[BladeChassis], GUID:[CF0A4E63-94B2-8505-9CD2-56B4CBB52A01], Revision#:[10], Creation Date:[2008-09-24 11:2
5:59.687], ModDate:[2008-09-24 14:44:55.859], ModBy:[david.sinclair], CommonName:[blade chassis 1]]; object=ClassName:[BladeChassis], GUID:[CF0A4E63-9
4B2-8505-9CD2-56B4CBB52A01], Revision#:[10], Creation Date:[2008-09-24 11:25:59.687], ModDate:[2008-09-24 14:44:55.859], ModBy:[david.sinclair], Commo
nName:[blade chassis 1]]

and before activation fired

[BeforeActivationFired(0): rule=ChassisSlotCollectionFieldWalker; tuple=[fid:3:3:ClassName:[BladeServerSlot], GUID:[AE26671E-BF95-B58A-A6AB-DA13BEED6B
D5], Revision#:[0], Creation Date:[2008-09-24 16:10:11.062], ModDate:[2008-09-24 16:10:11.062], ModBy:[david.sinclair], CommonName:[blade server slot
2]]
[fid:1:1:ClassName:[BladeChassis], GUID:[CF0A4E63-94B2-8505-9CD2-56B4CBB52A01], Revision#:[10], Creation Date:[2008-09-24 11:25:59.687], ModDate:[2008
-09-24 14:44:55.859], ModBy:[david.sinclair], CommonName:[blade chassis 1]]
]

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