[jboss-jira] [JBoss JIRA] Updated: (JBRULES-2871) KnowledgeAgent: unable to determine operator for symbol [after]

[Geoffrey De Smet (JIRA)]

     [ https://issues.jboss.org/browse/JBRULES-2871?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Geoffrey De Smet updated JBRULES-2871:
--------------------------------------

    Fix Version/s: 5.3.0.Final
                       (was: 5.3.0.CR1)


> KnowledgeAgent: unable to determine operator for symbol [after]
> ---------------------------------------------------------------
>
>                 Key: JBRULES-2871
>                 URL: https://issues.jboss.org/browse/JBRULES-2871
>             Project: Drools
>          Issue Type: Bug
>      Security Level: Public(Everyone can see) 
>          Components: drools-core
>    Affects Versions: 5.1.1.FINAL
>            Reporter: Oscar de Groot
>            Assignee: Esteban Aliverti
>             Fix For: 5.3.0.Final
>
>
> When loading a knowledge base via a KnowledgeAgent, only the operators defined in org.drools.base.evaluators.Operator (== != >= < <= <) are supported. When loading the same knowledge base via a KnowledgeBuilder, all operators are supported.
> Upon loading a knowledge base that contains another operator (e.g. "after", "before"), the following error is printed:
> [2011:01:19 14:01:44:exception]
> java.lang.RuntimeException: KnowledgeAgent exception while trying to deserialize KnowledgeDefinitionsPackage  
> 	at org.drools.agent.impl.KnowledgeAgentImpl.createPackageFromResource(KnowledgeAgentImpl.java:674)
> 	at org.drools.agent.impl.KnowledgeAgentImpl.addResourcesToKnowledgeBase(KnowledgeAgentImpl.java:899)
> ...
> Caused by: org.drools.RuntimeDroolsException: unable to determine operator for symbol [after]
> 	at org.drools.base.evaluators.Operator.determineOperator(Operator.java:87)
> 	at org.drools.base.evaluators.Operator.readResolve(Operator.java:122)
> Using Eclipse's debugging feature, I have determined that KnowledgeBuilder loads the rest of the operators through EvaluatorRegistry, while KnowledgeAgent does nothing to load any operators into org.drools.base.evaluators.Operator. I have tried modifying KnowledgeAgent by adding the code below to the constructor of KnowledgeAgentImpl. This resolves the problem: with this addition, the knowledge base with "after"-operator works as intended when loaded via a KnowledgeAgent.
> // Load all of Drools' default evaluators instead of just the ones defined
> // in org.drools.base.evaluators.Operator
> new EvaluatorRegistry();

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