[jboss-jira] [JBoss JIRA] (DROOLS-1243) ClassCastException at runtime when trying to match "from" and a built-in accumulate function.

[Mario Fusco (JIRA)]

    [ https://issues.jboss.org/browse/DROOLS-1243?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13274343#comment-13274343 ] 

Mario Fusco commented on DROOLS-1243:
-------------------------------------

Also this commit is necessary https://github.com/droolsjbpm/drools/commit/049a67a78

> ClassCastException at runtime when trying to match "from" and a built-in accumulate function.
> ---------------------------------------------------------------------------------------------
>
>                 Key: DROOLS-1243
>                 URL: https://issues.jboss.org/browse/DROOLS-1243
>             Project: Drools
>          Issue Type: Bug
>          Components: core engine
>            Reporter: Matteo Mortari
>            Assignee: Mario Fusco
>            Priority: Minor
>             Fix For: 7.0.0.Beta2
>
>
> A rule like this
> {code:java}
> global java.util.List list;
> rule R when
>   $theFrom : Double() from accumulate(MyPerson( $val : age ); 
>                                           sum( $val ) )
> then
>   list.add($theFrom);
> end
> {code}
> works fine but if modified like:
> {code:java}
> import java.math.BigDecimal;
> global java.util.List list;
> rule R when
>   $theFrom : BigDecimal() from accumulate(MyPerson( $val : age ); 
>                                           sum( $val ) )
> then
>   list.add($theFrom);
> end
> {code}
> then it breaks at runtime, with {{ClassCastException}}.
> Suggested correct behavior:
> {quote}it should either raise a compilation error (if it is a typed function, like sum()) or just fail to match at runtime, as BigDecimal() does not match the result of sum(){quote}
> full stack trace for reference:
> {code:java}
> Exception executing consequence for rule "R" in defaultpkg: java.lang.ClassCastException: java.lang.Double cannot be cast to java.math.BigDecimal
> 	at org.drools.core.runtime.rule.impl.DefaultConsequenceExceptionHandler.handleException(DefaultConsequenceExceptionHandler.java:39)
> 	at org.drools.core.common.DefaultAgenda.fireActivation(DefaultAgenda.java:1110)
> 	at org.drools.core.phreak.RuleExecutor.fire(RuleExecutor.java:121)
> 	at org.drools.core.phreak.RuleExecutor.evaluateNetworkAndFire(RuleExecutor.java:74)
> 	at org.drools.core.common.DefaultAgenda.fireNextItem(DefaultAgenda.java:1017)
> 	at org.drools.core.common.DefaultAgenda.fireLoop(DefaultAgenda.java:1360)
> 	at org.drools.core.common.DefaultAgenda.fireAllRules(DefaultAgenda.java:1298)
> 	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.integrationtests.AccumulateTest.testCCEAtRuntimeFromAccumulate(AccumulateTest.java:3116)
> 	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: java.lang.Double cannot be cast to java.math.BigDecimal
> 	at defaultpkg.Rule_R880096074DefaultConsequenceInvokerGenerated.evaluate(Unknown Source)
> 	at defaultpkg.Rule_R880096074DefaultConsequenceInvoker.evaluate(Unknown Source)
> 	at org.drools.core.common.DefaultAgenda.fireActivation(DefaultAgenda.java:1099)
> 	... 32 more
> {code}
> Will submit test case for reproducing the error.



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