[jboss-jira] [JBoss JIRA] (DROOLS-839) Accumulate Function ClassCastException

Eugene Shvartsman (JIRA) issues at jboss.org
Mon Jul 13 09:44:03 EDT 2015 

     [ https://issues.jboss.org/browse/DROOLS-839?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Eugene Shvartsman updated DROOLS-839:
-------------------------------------
    Description: 
I am getting a ClassCastException with the following LHS side of the rule. The sample I am posting is the simplest version of the rule that I could create while still retaining the error. 
{code:title=Rule.drl|borderStyle=solid}
rule "reproducer"
        dialect "mvel" 
	enabled true
	when
		$contract : Contract( $contractRefId : contractRefId, $scope : scope )
		(or 
			$employee : Employee ($scope == ContractScope.EmployeeContract && employeeId == $contractRefId) 
			$employee : Employee ($scope == ContractScope.TeamContract) 
		)
		$contractLine : MinMaxContractLine( contractLineType == ContractLineType.HOURS_PER_DAY, $maxMinutesValue : maximumValue, $weight : maximumWeight, 
											maximumEnabled == true, $contract == contract)
		$info : EmployeeRosterInfo( $type : profileDayType, $firstDayOfWeek : firstDayOfWeek )
		$shiftDate : ShiftDate(isInPlanningWindow($info))
		accumulate ( $shift : ShiftAssignment( employee != null, employee == $employee
								,getDateByProfileDayType($type).equals($shiftDate)
								,$minutes : shiftDurationMinutes)
           			,$minutesInDay  : sum( $shift.getShiftDurationMinutesByProfileType($type, $shiftDate) )
           			,$shiftsInvolved : collectList($shift)
		)
	then
end
{code}


During the execution of the rules I get the following stack trace:

{code:title=StackTrace.java|borderStyle=solid}
java.lang.RuntimeException: java.lang.ClassCastException: com.reproducer.engine.domain.contract.Contract cannot be cast to com.reproducer.engine.domain.EmployeeRosterInfo
	at org.drools.core.rule.MultiAccumulate.accumulate(MultiAccumulate.java:99)
	at org.drools.core.phreak.PhreakAccumulateNode.addMatch(PhreakAccumulateNode.java:751)
	at org.drools.core.phreak.PhreakAccumulateNode.doLeftInserts(PhreakAccumulateNode.java:163)
	at org.drools.core.phreak.PhreakAccumulateNode.doNode(PhreakAccumulateNode.java:80)
	at org.drools.core.phreak.RuleNetworkEvaluator.switchOnDoBetaNode(RuleNetworkEvaluator.java:562)
	at org.drools.core.phreak.RuleNetworkEvaluator.evalBetaNode(RuleNetworkEvaluator.java:533)
	at org.drools.core.phreak.RuleNetworkEvaluator.innerEval(RuleNetworkEvaluator.java:334)
	at org.drools.core.phreak.RuleNetworkEvaluator.outerEval(RuleNetworkEvaluator.java:161)
	at org.drools.core.phreak.RuleNetworkEvaluator.evaluateNetwork(RuleNetworkEvaluator.java:116)
	at org.drools.core.phreak.RuleExecutor.reEvaluateNetwork(RuleExecutor.java:231)
	at org.drools.core.phreak.RuleExecutor.evaluateNetworkAndFire(RuleExecutor.java:106)
	at org.drools.core.common.DefaultAgenda.fireNextItem(DefaultAgenda.java:1008)
	at org.drools.core.common.DefaultAgenda.fireAllRules(DefaultAgenda.java:1294)
	at org.drools.core.impl.StatefulKnowledgeSessionImpl.fireAllRules(StatefulKnowledgeSessionImpl.java:1289)
	at org.drools.core.impl.StatefulKnowledgeSessionImpl.fireAllRules(StatefulKnowledgeSessionImpl.java:1262)
	at com.engine.drools.hardconstraints.MaxHoursPerDayTester.testMaxHoursTwoShiftsViolatedSplitByMidnightType(MaxHoursPerDayTester.java:67)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:606)
	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)
	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)
	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
	at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:28)
	at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:31)
	at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:263)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:69)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:48)
	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231)
	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60)
	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229)
	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50)
	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222)
	at org.junit.runners.ParentRunner.run(ParentRunner.java:292)
	at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
	at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)
Caused by: java.lang.ClassCastException: com.reproducer.engine.domain.contract.Contract cannot be cast to com.reproducer.engine.domain.EmployeeRosterInfo
	at org.drools.base.com.reproducer.engine.domain.EmployeeRosterInfo1136687844$getProfileDayType.getValue(Unknown Source)
	at org.drools.core.base.ClassFieldReader.getValue(ClassFieldReader.java:91)
	at org.drools.core.rule.Declaration.getValue(Declaration.java:228)
	at org.drools.core.base.mvel.MVELCompilationUnit.updateFactory(MVELCompilationUnit.java:359)
	at org.drools.core.base.mvel.MVELCompilationUnit.getFactory(MVELCompilationUnit.java:291)
	at org.drools.core.base.accumulators.MVELAccumulatorFunctionExecutor.accumulate(MVELAccumulatorFunctionExecutor.java:116)
	at org.drools.core.rule.MultiAccumulate.accumulate(MultiAccumulate.java:90)
	... 40 more

{code}

If I remove the 'or' clause from the rule by commenting out the lines as below, the error goes away.
{code:title=Error.java|borderStyle=solid}
		$contract : Contract( $contractRefId : contractRefId, $scope : scope )
		// (or
			$employee : Employee ($scope == ContractScope.EmployeeContract && employeeId == $contractRefId) 
			// $employee : Employee ($scope == ContractScope.TeamContract) 
		// )
{code}


  was:
I am getting a ClassCastException with the following LHS side of the rule. The sample I am posting is the simplest version of the rule that I could create while still retaining the error. 
{code:title=Rule.drl|borderStyle=solid}
rule "reproducer"
        dialect "mvel" 
	enabled true
	when
		$contract : Contract( $contractRefId : contractRefId, $scope : scope )
		(or 
			$employee : Employee ($scope == ContractScope.EmployeeContract && employeeId == $contractRefId) 
			$employee : Employee ($scope == ContractScope.TeamContract) 
		)
		$contractLine : MinMaxContractLine( contractLineType == ContractLineType.HOURS_PER_DAY, $maxMinutesValue : maximumValue, $weight : maximumWeight, 
											maximumEnabled == true, $contract == contract)
		$info : EmployeeRosterInfo( $type : profileDayType, $firstDayOfWeek : firstDayOfWeek )
		$shiftDate : ShiftDate(isInPlanningWindow($info))
		accumulate ( $shift : ShiftAssignment( employee != null, employee == $employee
								,getDateByProfileDayType($type).equals($shiftDate)
								,$minutes : shiftDurationMinutes)
           			,$minutesInDay  : sum( $shift.getShiftDurationMinutesByProfileType($type, $shiftDate) )
           			,$shiftsInvolved : collectList($shift)
		)
	then
end
{code}


During the execution of the rules I get the following stack trace:

{code:title=StackTrace.java|borderStyle=solid}
java.lang.RuntimeException: java.lang.ClassCastException: com.reproducer.engine.domain.contract.Contract cannot be cast to com.reproducer.engine.domain.EmployeeRosterInfo
	at org.drools.core.rule.MultiAccumulate.accumulate(MultiAccumulate.java:99)
	at org.drools.core.phreak.PhreakAccumulateNode.addMatch(PhreakAccumulateNode.java:751)
	at org.drools.core.phreak.PhreakAccumulateNode.doLeftInserts(PhreakAccumulateNode.java:163)
	at org.drools.core.phreak.PhreakAccumulateNode.doNode(PhreakAccumulateNode.java:80)
	at org.drools.core.phreak.RuleNetworkEvaluator.switchOnDoBetaNode(RuleNetworkEvaluator.java:562)
	at org.drools.core.phreak.RuleNetworkEvaluator.evalBetaNode(RuleNetworkEvaluator.java:533)
	at org.drools.core.phreak.RuleNetworkEvaluator.innerEval(RuleNetworkEvaluator.java:334)
	at org.drools.core.phreak.RuleNetworkEvaluator.outerEval(RuleNetworkEvaluator.java:161)
	at org.drools.core.phreak.RuleNetworkEvaluator.evaluateNetwork(RuleNetworkEvaluator.java:116)
	at org.drools.core.phreak.RuleExecutor.reEvaluateNetwork(RuleExecutor.java:231)
	at org.drools.core.phreak.RuleExecutor.evaluateNetworkAndFire(RuleExecutor.java:106)
	at org.drools.core.common.DefaultAgenda.fireNextItem(DefaultAgenda.java:1008)
	at org.drools.core.common.DefaultAgenda.fireAllRules(DefaultAgenda.java:1294)
	at org.drools.core.impl.StatefulKnowledgeSessionImpl.fireAllRules(StatefulKnowledgeSessionImpl.java:1289)
	at org.drools.core.impl.StatefulKnowledgeSessionImpl.fireAllRules(StatefulKnowledgeSessionImpl.java:1262)
	at com.engine.drools.hardconstraints.MaxHoursPerDayTester.testMaxHoursTwoShiftsViolatedSplitByMidnightType(MaxHoursPerDayTester.java:67)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:606)
	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)
	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)
	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
	at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:28)
	at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:31)
	at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:263)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:69)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:48)
	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231)
	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60)
	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229)
	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50)
	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222)
	at org.junit.runners.ParentRunner.run(ParentRunner.java:292)
	at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
	at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)
Caused by: java.lang.ClassCastException: com.reproducer.engine.domain.contract.Contract cannot be cast to com.reproducer.engine.domain.EmployeeRosterInfo
	at org.drools.base.com.reproducer.engine.domain.EmployeeRosterInfo1136687844$getProfileDayType.getValue(Unknown Source)
	at org.drools.core.base.ClassFieldReader.getValue(ClassFieldReader.java:91)
	at org.drools.core.rule.Declaration.getValue(Declaration.java:228)
	at org.drools.core.base.mvel.MVELCompilationUnit.updateFactory(MVELCompilationUnit.java:359)
	at org.drools.core.base.mvel.MVELCompilationUnit.getFactory(MVELCompilationUnit.java:291)
	at org.drools.core.base.accumulators.MVELAccumulatorFunctionExecutor.accumulate(MVELAccumulatorFunctionExecutor.java:116)
	at org.drools.core.rule.MultiAccumulate.accumulate(MultiAccumulate.java:90)
	... 40 more

{code}

If I remove the 'or' clause from the rule by deleting the lines below in bold, the error goes away.
{code:title=Error.java|borderStyle=solid}
		$contract : Contract( $contractRefId : contractRefId, $scope : scope )
		*(or*
			$employee : Employee ($scope == ContractScope.EmployeeContract && employeeId == $contractRefId) 
			*$employee : Employee ($scope == ContractScope.TeamContract) *
		*)*
{code}




> Accumulate Function ClassCastException
> --------------------------------------
>
>                 Key: DROOLS-839
>                 URL: https://issues.jboss.org/browse/DROOLS-839
>             Project: Drools
>          Issue Type: Bug
>          Components: core engine
>    Affects Versions: 6.2.0.CR4, 6.3.0.Beta1
>         Environment: Mac OS X 10.10.3
>            Reporter: Eugene Shvartsman
>            Assignee: Mario Fusco
>         Attachments: Drools-839-Reproducer.zip
>
>
> I am getting a ClassCastException with the following LHS side of the rule. The sample I am posting is the simplest version of the rule that I could create while still retaining the error. 
> {code:title=Rule.drl|borderStyle=solid}
> rule "reproducer"
>         dialect "mvel" 
> 	enabled true
> 	when
> 		$contract : Contract( $contractRefId : contractRefId, $scope : scope )
> 		(or 
> 			$employee : Employee ($scope == ContractScope.EmployeeContract && employeeId == $contractRefId) 
> 			$employee : Employee ($scope == ContractScope.TeamContract) 
> 		)
> 		$contractLine : MinMaxContractLine( contractLineType == ContractLineType.HOURS_PER_DAY, $maxMinutesValue : maximumValue, $weight : maximumWeight, 
> 											maximumEnabled == true, $contract == contract)
> 		$info : EmployeeRosterInfo( $type : profileDayType, $firstDayOfWeek : firstDayOfWeek )
> 		$shiftDate : ShiftDate(isInPlanningWindow($info))
> 		accumulate ( $shift : ShiftAssignment( employee != null, employee == $employee
> 								,getDateByProfileDayType($type).equals($shiftDate)
> 								,$minutes : shiftDurationMinutes)
>            			,$minutesInDay  : sum( $shift.getShiftDurationMinutesByProfileType($type, $shiftDate) )
>            			,$shiftsInvolved : collectList($shift)
> 		)
> 	then
> end
> {code}
> During the execution of the rules I get the following stack trace:
> {code:title=StackTrace.java|borderStyle=solid}
> java.lang.RuntimeException: java.lang.ClassCastException: com.reproducer.engine.domain.contract.Contract cannot be cast to com.reproducer.engine.domain.EmployeeRosterInfo
> 	at org.drools.core.rule.MultiAccumulate.accumulate(MultiAccumulate.java:99)
> 	at org.drools.core.phreak.PhreakAccumulateNode.addMatch(PhreakAccumulateNode.java:751)
> 	at org.drools.core.phreak.PhreakAccumulateNode.doLeftInserts(PhreakAccumulateNode.java:163)
> 	at org.drools.core.phreak.PhreakAccumulateNode.doNode(PhreakAccumulateNode.java:80)
> 	at org.drools.core.phreak.RuleNetworkEvaluator.switchOnDoBetaNode(RuleNetworkEvaluator.java:562)
> 	at org.drools.core.phreak.RuleNetworkEvaluator.evalBetaNode(RuleNetworkEvaluator.java:533)
> 	at org.drools.core.phreak.RuleNetworkEvaluator.innerEval(RuleNetworkEvaluator.java:334)
> 	at org.drools.core.phreak.RuleNetworkEvaluator.outerEval(RuleNetworkEvaluator.java:161)
> 	at org.drools.core.phreak.RuleNetworkEvaluator.evaluateNetwork(RuleNetworkEvaluator.java:116)
> 	at org.drools.core.phreak.RuleExecutor.reEvaluateNetwork(RuleExecutor.java:231)
> 	at org.drools.core.phreak.RuleExecutor.evaluateNetworkAndFire(RuleExecutor.java:106)
> 	at org.drools.core.common.DefaultAgenda.fireNextItem(DefaultAgenda.java:1008)
> 	at org.drools.core.common.DefaultAgenda.fireAllRules(DefaultAgenda.java:1294)
> 	at org.drools.core.impl.StatefulKnowledgeSessionImpl.fireAllRules(StatefulKnowledgeSessionImpl.java:1289)
> 	at org.drools.core.impl.StatefulKnowledgeSessionImpl.fireAllRules(StatefulKnowledgeSessionImpl.java:1262)
> 	at com.engine.drools.hardconstraints.MaxHoursPerDayTester.testMaxHoursTwoShiftsViolatedSplitByMidnightType(MaxHoursPerDayTester.java:67)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> 	at java.lang.reflect.Method.invoke(Method.java:606)
> 	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)
> 	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
> 	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)
> 	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
> 	at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:28)
> 	at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:31)
> 	at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:263)
> 	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:69)
> 	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:48)
> 	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231)
> 	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60)
> 	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229)
> 	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50)
> 	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222)
> 	at org.junit.runners.ParentRunner.run(ParentRunner.java:292)
> 	at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
> 	at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
> 	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)
> 	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675)
> 	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
> 	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)
> Caused by: java.lang.ClassCastException: com.reproducer.engine.domain.contract.Contract cannot be cast to com.reproducer.engine.domain.EmployeeRosterInfo
> 	at org.drools.base.com.reproducer.engine.domain.EmployeeRosterInfo1136687844$getProfileDayType.getValue(Unknown Source)
> 	at org.drools.core.base.ClassFieldReader.getValue(ClassFieldReader.java:91)
> 	at org.drools.core.rule.Declaration.getValue(Declaration.java:228)
> 	at org.drools.core.base.mvel.MVELCompilationUnit.updateFactory(MVELCompilationUnit.java:359)
> 	at org.drools.core.base.mvel.MVELCompilationUnit.getFactory(MVELCompilationUnit.java:291)
> 	at org.drools.core.base.accumulators.MVELAccumulatorFunctionExecutor.accumulate(MVELAccumulatorFunctionExecutor.java:116)
> 	at org.drools.core.rule.MultiAccumulate.accumulate(MultiAccumulate.java:90)
> 	... 40 more
> {code}
> If I remove the 'or' clause from the rule by commenting out the lines as below, the error goes away.
> {code:title=Error.java|borderStyle=solid}
> 		$contract : Contract( $contractRefId : contractRefId, $scope : scope )
> 		// (or
> 			$employee : Employee ($scope == ContractScope.EmployeeContract && employeeId == $contractRefId) 
> 			// $employee : Employee ($scope == ContractScope.TeamContract) 
> 		// )
> {code}



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