[rules-users] Why won't this work? (Conjunction + Disjunction over a set)

[Edson Tirelli]

   Looks like a bug on the offset calculation of the last "from"
pattern. Can you please open a JIRA with the information from your
e-mail?

   Meanwhile, as a workaround, try to use the "or" as the last CE in
your rule, i.e.:

when
    $ldes : Set(size == 2) from collect(LoopDetectorEvent() over
window:length(2))
    LoopDetectorEvent($t3 : transportation == "BUS", $id3 : eventID) from $ldes
    (or LoopDetectorEvent($t1 : transportation == "LKW", $id1 :
eventID) from $ldes
         LoopDetectorEvent($t2 : transportation == "PKW", $id2 :
eventID) from $ldes)


    Edson


2011/1/10 OlliSee <o.roess at seeburger.de>:
>
> Hello there and a happy new year to everyone reading :)
>
> Why am I here again? Yep, got a problem. Don't know why it doesn't work. I'm
> using the latest snapshot version.
> So here it goes.
>
> A simple rule with conjunction and disjunction but over a set of events.
>
>        when
>                $ldes : Set(size == 2) from collect(LoopDetectorEvent() over
> window:length(2))
>                (or LoopDetectorEvent($t1 : transportation == "LKW", $id1 : eventID) from
> $ldes
>                LoopDetectorEvent($t2 : transportation == "PKW", $id2 : eventID) from
> $ldes)
>                LoopDetectorEvent($t3 : transportation == "BUS", $id3 : eventID) from
> $ldes
>
> So, what the rule says: fire when there's a BUS event plus either a LKW or
> PKW event in the set.
>
> But, instead I get a big exception. It's posted at the end.
>
> Interestingly, it works if I don't use the Set, like this...
>
>        when
>                (or $e1 : LoopDetectorEvent($t1 : transportation == "PKW", $id1 : eventID)
> over window:length(1)
>                $e2 : LoopDetectorEvent($t2 : transportation == "LKW", $id2 : eventID)
> over window:length(1))
>                LoopDetectorEvent($t3 : transportation == "BUS", $id3 : eventID) over
> window:length(1)
>
> but that rule does not have the same meaning. So it's useless for me.
> Besides, it DOES work with the set if I just cut the third event out (the
> BUS event).
>
> What is wrong here?
>
> Thanks in advance.
> Kind regards!
> Oliver
>
>
> Exception in thread "Thread-2" java.lang.ClassCastException:
> org.drools.reteoo.InitialFactImpl cannot be cast to
> trafficsys.domain.events.LoopDetectorEvent
>        at
> org.drools.base.trafficsys.domain.events.LoopDetectorEvent446196$getTransportation.getValue(Unknown
> Source)
>        at org.drools.base.ClassFieldReader.getValue(ClassFieldReader.java:91)
>        at
> org.drools.base.evaluators.EqualityEvaluatorsDefinition$StringEqualEvaluator.evaluate(EqualityEvaluatorsDefinition.java:1961)
>        at org.drools.rule.LiteralRestriction.isAllowed(LiteralRestriction.java:92)
>        at org.drools.rule.LiteralConstraint.isAllowed(LiteralConstraint.java:109)
>        at
> org.drools.reteoo.FromNode.checkConstraintsAndPropagate(FromNode.java:264)
>        at org.drools.reteoo.FromNode.assertLeftTuple(FromNode.java:138)
>        at
> org.drools.reteoo.SingleLeftTupleSinkAdapter.doPropagateAssertLeftTuple(SingleLeftTupleSinkAdapter.java:189)
>        at
> org.drools.reteoo.SingleLeftTupleSinkAdapter.propagateAssertLeftTuple(SingleLeftTupleSinkAdapter.java:64)
>        at
> org.drools.reteoo.FromNode.checkConstraintsAndPropagate(FromNode.java:279)
>        at org.drools.reteoo.FromNode.assertLeftTuple(FromNode.java:138)
>        at
> org.drools.reteoo.SingleLeftTupleSinkAdapter.doPropagateAssertLeftTuple(SingleLeftTupleSinkAdapter.java:189)
>        at
> org.drools.reteoo.SingleLeftTupleSinkAdapter.propagateAssertLeftTuple(SingleLeftTupleSinkAdapter.java:64)
>        at
> org.drools.reteoo.AccumulateNode.evaluateResultConstraints(AccumulateNode.java:662)
>        at org.drools.reteoo.AccumulateNode.assertObject(AccumulateNode.java:270)
>        at
> org.drools.reteoo.CompositeObjectSinkAdapter.doPropagateAssertObject(CompositeObjectSinkAdapter.java:450)
>        at
> org.drools.reteoo.CompositeObjectSinkAdapter.propagateAssertObject(CompositeObjectSinkAdapter.java:378)
>        at org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:190)
>        at org.drools.reteoo.EntryPointNode.assertObject(EntryPointNode.java:145)
>        at
> org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:1187)
>        at
> org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:1089)
>        at
> org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:893)
>        at
> org.drools.impl.StatefulKnowledgeSessionImpl.insert(StatefulKnowledgeSessionImpl.java:238)
>        at trafficsys.SessionInterface.insertAndFire(SessionInterface.java:133)
> --
> View this message in context: http://drools-java-rules-engine.46999.n3.nabble.com/Why-won-t-this-work-Conjunction-Disjunction-over-a-set-tp2227002p2227002.html
> Sent from the Drools - User mailing list archive at Nabble.com.
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-- 
  Edson Tirelli
  JBoss Drools Core Development
  JBoss by Red Hat @ www.jboss.com