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

[Stephanie Kroll (JIRA)]

Stephanie Kroll created DROOLS-600:
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             Summary: 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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