[jboss-jira] [JBoss JIRA] (DROOLS-4447) ClassCastException in mvel when updating a List property with modify

[Edson Tirelli (Jira)]

     [ https://issues.jboss.org/browse/DROOLS-4447?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Edson Tirelli updated DROOLS-4447:
----------------------------------
    Priority: Critical  (was: Major)


> ClassCastException in mvel when updating a List property with modify
> --------------------------------------------------------------------
>
>                 Key: DROOLS-4447
>                 URL: https://issues.jboss.org/browse/DROOLS-4447
>             Project: Drools
>          Issue Type: Bug
>          Components: core engine
>    Affects Versions: 7.25.0.Final
>            Reporter: Martin Weiler
>            Assignee: Mario Fusco
>            Priority: Critical
>              Labels: support
>
> The following code in the RHS of a rule fails with mvel dialect:
> {noformat}
> +                "    modify($p) { addresses.add(address) }\n" +
> +                "    //$p.getAddresses().add(address); update($p);\n" +
> {noformat}
> Exception:
> {noformat}
> Exception executing consequence for rule "addAddress" in defaultpkg: java.lang.ClassCastException: org.mvel2.optimizers.impl.refl.nodes.GetterAccessor cannot be cast to org.mvel2.optimizers.impl.refl.nodes.MethodAccessor
> 	at org.drools.core.runtime.rule.impl.DefaultConsequenceExceptionHandler.handleException(DefaultConsequenceExceptionHandler.java:39)
> 	at org.drools.core.common.DefaultAgenda.handleException(DefaultAgenda.java:1242)
> 	at org.drools.core.phreak.RuleExecutor.innerFireActivation(RuleExecutor.java:439)
> 	at org.drools.core.phreak.RuleExecutor.fireActivation(RuleExecutor.java:380)
> 	at org.drools.core.phreak.RuleExecutor.fire(RuleExecutor.java:136)
> 	at org.drools.core.phreak.RuleExecutor.evaluateNetworkAndFire(RuleExecutor.java:89)
> 	at org.drools.core.concurrent.AbstractRuleEvaluator.internalEvaluateAndFire(AbstractRuleEvaluator.java:34)
> 	at org.drools.core.concurrent.SequentialRuleEvaluator.evaluateAndFire(SequentialRuleEvaluator.java:43)
> 	at org.drools.core.common.DefaultAgenda.fireLoop(DefaultAgenda.java:1062)
> 	at org.drools.core.common.DefaultAgenda.internalFireAllRules(DefaultAgenda.java:1009)
> 	at org.drools.core.common.DefaultAgenda.fireAllRules(DefaultAgenda.java:1001)
> 	at org.drools.core.impl.StatefulKnowledgeSessionImpl.internalFireAllRules(StatefulKnowledgeSessionImpl.java:1330)
> 	at org.drools.core.impl.StatefulKnowledgeSessionImpl.fireAllRules(StatefulKnowledgeSessionImpl.java:1321)
> 	at org.drools.core.impl.StatefulKnowledgeSessionImpl.fireAllRules(StatefulKnowledgeSessionImpl.java:1305)
> 	at org.drools.compiler.integrationtests.Misc2Test.testModifyAddToList(Misc2Test.java:9139)
> {noformat}
> Notes:
> * The same rule worked in Drools 6.5.x
> * The alternative syntax (commented out in the snippet above) works



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