[jboss-jira] [JBoss JIRA] Commented: (JBRULES-3047) NPE (fatal) when using bound var to non-existing field in eval

[Wolfgang Laun (JIRA)]

    [ https://issues.jboss.org/browse/JBRULES-3047?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12603661#comment-12603661 ] 

Wolfgang Laun commented on JBRULES-3047:
----------------------------------------

Simply substitute java.lang.Object for the Class in DeclarationTypeFixer.fix when declaration.getExtractor() is null does not work. Perhaps the binding variable must be dropped when there's no matching field.



> NPE (fatal) when using bound var to non-existing field in eval
> --------------------------------------------------------------
>
>                 Key: JBRULES-3047
>                 URL: https://issues.jboss.org/browse/JBRULES-3047
>             Project: Drools
>          Issue Type: Bug
>      Security Level: Public(Everyone can see) 
>    Affects Versions: 5.2.0.M2
>            Reporter: Wolfgang Laun
>            Assignee: Mark Proctor
>             Fix For: 5.2.0.CR1
>
>
> rule foo
> when
>     Integer( $i : noSuchValue )
>     eval( $i > 0 )
> then
> end
> Exception in thread "main" java.lang.NullPointerException
> 	at org.drools.rule.builder.dialect.java.DeclarationTypeFixer.fix(DeclarationTypeFixer.java:9)
> 	at org.drools.rule.builder.dialect.java.AbstractJavaRuleBuilder.createVariableContext(AbstractJavaRuleBuilder.java:95)
> 	at org.drools.rule.builder.dialect.java.JavaEvalBuilder.build(JavaEvalBuilder.java:79)
> 	at org.drools.rule.builder.dialect.java.JavaEvalBuilder.build(JavaEvalBuilder.java:40)
> 	at org.drools.rule.builder.GroupElementBuilder.build(GroupElementBuilder.java:65)
> 	at org.drools.rule.builder.RuleBuilder.build(RuleBuilder.java:81)
> 	at org.drools.compiler.PackageBuilder.addRule(PackageBuilder.java:1648)
> 	at org.drools.compiler.PackageBuilder.addPackage(PackageBuilder.java:699)
> 	at org.drools.compiler.PackageBuilder.addPackageFromDrl(PackageBuilder.java:317)
> 	at org.drools.compiler.PackageBuilder.addKnowledgeResource(PackageBuilder.java:495)
> 	at org.drools.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.java:28)

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