[jboss-jira] [JBoss JIRA] (DROOLS-600) ClassCastException when using FactTemplates

[Stephanie Kroll (JIRA)]

    [ https://issues.jboss.org/browse/DROOLS-600?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13005524#comment-13005524 ] 

Stephanie Kroll commented on DROOLS-600:
----------------------------------------

As an aside, any chance of making FactTemplates part of the public API again?  It is a good feature and necessary when facts don't conform to the standard pattern.

> ClassCastException when using FactTemplates
> -------------------------------------------
>
>                 Key: DROOLS-600
>                 URL: https://issues.jboss.org/browse/DROOLS-600
>             Project: Drools
>          Issue Type: Bug
>    Affects Versions: 6.1.0.Final
>            Reporter: Stephanie Kroll
>            Assignee: Mark Proctor
>
> We have embedded Drools in our project and use FactTemplates.  While attempting to upgrade from Drools 5.3 to 6.1, we are receiving a ClassCastException in org.drools.compiler.rule.builder.PatternBuilder when loading and compiling rules.
> The problem is evident upon inspection of the code.  In method build(RuleBuildContext, BaseDescr, Pattern), the local var objectType can be either a FactTemplateObjectType or a ClassObjectType, but line 258 does not check the type before attempting the cast.
> {noformat}
> java.lang.ClassCastException: org.drools.core.facttemplates.FactTemplateObjectType cannot be cast to org.drools.core.base.ClassObjectType
> 	at org.drools.compiler.rule.builder.PatternBuilder.build(PatternBuilder.java:258)
> 	at org.drools.compiler.rule.builder.PatternBuilder.build(PatternBuilder.java:138)
> 	at org.drools.compiler.rule.builder.GroupElementBuilder.build(GroupElementBuilder.java:66)
> 	at org.drools.compiler.rule.builder.RuleBuilder.build(RuleBuilder.java:89)
> 	at org.drools.compiler.builder.impl.KnowledgeBuilderImpl.addRule(KnowledgeBuilderImpl.java:1652)
> 	at org.drools.compiler.builder.impl.KnowledgeBuilderImpl.compileRules(KnowledgeBuilderImpl.java:968)
> 	at org.drools.compiler.builder.impl.KnowledgeBuilderImpl.compileAllRules(KnowledgeBuilderImpl.java:844)
> 	at org.drools.compiler.builder.impl.KnowledgeBuilderImpl.addPackage(KnowledgeBuilderImpl.java:838)
> 	at org.drools.compiler.builder.impl.KnowledgeBuilderImpl.addPackageFromDrl(KnowledgeBuilderImpl.java:339)
> 	at org.drools.compiler.builder.impl.KnowledgeBuilderImpl.addPackageFromDrl(KnowledgeBuilderImpl.java:315)
> 	...{noformat}



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