[jboss-jira] [JBoss JIRA] Updated: (JBRULES-2774) CCE when using undeclared events

[Mark Proctor (JIRA)]

     [ https://issues.jboss.org/browse/JBRULES-2774?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Mark Proctor updated JBRULES-2774:
----------------------------------

    Fix Version/s: 5.2.0.CR1
                       (was: 5.2.0.M1)


> CCE when using undeclared events 
> ---------------------------------
>
>                 Key: JBRULES-2774
>                 URL: https://issues.jboss.org/browse/JBRULES-2774
>             Project: Drools
>          Issue Type: Bug
>      Security Level: Public(Everyone can see) 
>    Affects Versions: 5.1.1.FINAL
>            Reporter: Wolfgang Laun
>            Assignee: Mark Proctor
>             Fix For: 5.2.0.CR1
>
>
> It may not be possible to avoid a runtime error because the parser does not "understand" temporal operators although it should not be impossible to add this. But is should be possible to produce an error message that clearly indicates the problem, e.g., "Cannot use operator xxx on fact type YYY which is not an event" or "YYY must be declared with @role(event) when using temporal operators".
> Omitting the declares for events, as in this DRL:
> /**
> declare CallStart
>   @role( event )
>   @timestamp( time )
> end
> declare CallEnd
>   @role( event )
>   @timestamp( time )
> end
> **/
> rule "match-start-end"
> when
>     $start: CallStart( $s: source, $d: destination, $st: time )
>     not CallStart( this before $start )
>     $end:   CallEnd( source == $s, destination == $d, $et: time )
>     not CallEnd( source == $s, destination == $d, this before $end )
> then
>    //...
> end
> results in a runtime exception:
> Exception in thread "main" java.lang.ClassCastException: org.drools.common.DefaultFactHandle cannot be cast to org.drools.common.EventFactHandle
> 	at org.drools.base.evaluators.BeforeEvaluatorDefinition$BeforeEvaluator.evaluateCachedRight(BeforeEvaluatorDefinition.java:316)
> 	at org.drools.rule.VariableRestriction.isAllowedCachedRight(VariableRestriction.java:117)
> 	at org.drools.rule.VariableConstraint.isAllowedCachedRight(VariableConstraint.java:121)
> 	at org.drools.common.SingleBetaConstraints.isAllowedCachedRight(SingleBetaConstraints.java:151)
> 	at org.drools.reteoo.NotNode.assertObject(NotNode.java:140)
> 	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:1174)
> 	at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:1123)
> 	at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:917)
> 	at org.drools.impl.StatefulKnowledgeSessionImpl.insert(StatefulKnowledgeSessionImpl.java:251)
> 	at call.Main.execute(Main.java:90)
> 	at call.Main.main(Main.java:100)

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