[jboss-jira] [JBoss JIRA] (DROOLS-1265) OOPath use in accumulate throws ClassCastException at runtime

[Mario Fusco (JIRA)]

    [ https://issues.jboss.org/browse/DROOLS-1265?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13286258#comment-13286258 ] 

Mario Fusco commented on DROOLS-1265:
-------------------------------------

Fix cherry-picked to branch 6.5.x with https://github.com/droolsjbpm/drools/commit/0eba6498a

> OOPath use in accumulate throws ClassCastException at runtime
> -------------------------------------------------------------
>
>                 Key: DROOLS-1265
>                 URL: https://issues.jboss.org/browse/DROOLS-1265
>             Project: Drools
>          Issue Type: Bug
>          Components: core engine
>            Reporter: Matteo Mortari
>            Assignee: Matteo Mortari
>             Fix For: 6.5.0.Final, 7.0.0.Beta2
>
>
> A rule with the following ClassCastException at runtime
> {code:java}
> rule R when
>   accumulate ( Adult( $child: /children ) ; $avg: average ($child.getAge()) )
> then
>   ...
> {code}
> would fail with the 
> {code:java}
> java.lang.RuntimeException: java.lang.ClassCastException: org.drools.core.reteoo.SubnetworkTuple cannot be cast to org.drools.compiler.xpath.Child
> 	at org.drools.core.rule.SingleAccumulate.accumulate(SingleAccumulate.java:106)
> 	at org.drools.core.phreak.PhreakAccumulateNode.addMatch(PhreakAccumulateNode.java:769)
> 	at org.drools.core.phreak.PhreakAccumulateNode.doLeftInserts(PhreakAccumulateNode.java:176)
> 	at org.drools.core.phreak.PhreakAccumulateNode.doNode(PhreakAccumulateNode.java:97)
> 	at org.drools.core.phreak.RuleNetworkEvaluator.switchOnDoBetaNode(RuleNetworkEvaluator.java:534)
> 	at org.drools.core.phreak.RuleNetworkEvaluator.evalBetaNode(RuleNetworkEvaluator.java:505)
> 	at org.drools.core.phreak.RuleNetworkEvaluator.evalNode(RuleNetworkEvaluator.java:341)
> 	at org.drools.core.phreak.RuleNetworkEvaluator.innerEval(RuleNetworkEvaluator.java:301)
> 	at org.drools.core.phreak.RuleNetworkEvaluator.evalStackEntry(RuleNetworkEvaluator.java:198)
> 	at org.drools.core.phreak.RuleNetworkEvaluator.outerEval(RuleNetworkEvaluator.java:141)
> 	at org.drools.core.phreak.RuleNetworkEvaluator.evaluateNetwork(RuleNetworkEvaluator.java:94)
> 	at org.drools.core.phreak.RuleExecutor.reEvaluateNetwork(RuleExecutor.java:194)
> 	at org.drools.core.phreak.RuleExecutor.evaluateNetworkAndFire(RuleExecutor.java:73)
> 	at org.drools.core.common.DefaultAgenda.fireNextItem(DefaultAgenda.java:969)
> 	at org.drools.core.common.DefaultAgenda.fireLoop(DefaultAgenda.java:1311)
> 	at org.drools.core.common.DefaultAgenda.fireAllRules(DefaultAgenda.java:1250)
> 	at org.drools.core.impl.StatefulKnowledgeSessionImpl.internalFireAllRules(StatefulKnowledgeSessionImpl.java:1353)
> 	at org.drools.core.impl.StatefulKnowledgeSessionImpl.fireAllRules(StatefulKnowledgeSessionImpl.java:1344)
> 	at org.drools.core.impl.StatefulKnowledgeSessionImpl.fireAllRules(StatefulKnowledgeSessionImpl.java:1325)
> 	at org.drools.compiler.xpath.XpathTest.testAccumulate(XpathTest.java:991)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> 	at java.lang.reflect.Method.invoke(Method.java:498)
> 	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
> 	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
> 	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
> 	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
> 	at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
> 	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
> 	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
> 	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
> 	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
> 	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
> 	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
> 	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
> 	at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
> 	at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86)
> 	at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
> 	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)
> 	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:678)
> 	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
> 	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)
> Caused by: java.lang.ClassCastException: org.drools.core.reteoo.SubnetworkTuple cannot be cast to org.drools.compiler.xpath.Child
> 	at defaultpkg.Rule_R138182734AccumulateExpression0Invoker.evaluate(Rule_R138182734AccumulateExpression0Invoker.java:19)
> 	at org.drools.core.base.accumulators.JavaAccumulatorFunctionExecutor.accumulate(JavaAccumulatorFunctionExecutor.java:109)
> 	at org.drools.core.rule.SingleAccumulate.accumulate(SingleAccumulate.java:98)
> 	... 42 more
> {code}



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