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

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: Edson Tirelli Fix For: 5.5.0.Beta1 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)