[jboss-jira] [JBoss JIRA] Updated: (JBRULES-3134) Parenthesized class name causes NPE in RuleBuilder (MVEL)

[Mark Proctor (JIRA)]

     [ https://issues.jboss.org/browse/JBRULES-3134?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Mark Proctor updated JBRULES-3134:
----------------------------------

    Assignee: Edson Tirelli  (was: Mark Proctor)


> Parenthesized class name causes NPE in RuleBuilder (MVEL)
> ---------------------------------------------------------
>
>                 Key: JBRULES-3134
>                 URL: https://issues.jboss.org/browse/JBRULES-3134
>             Project: Drools
>          Issue Type: Bug
>      Security Level: Public(Everyone can see) 
>    Affects Versions: 5.2.0.Final
>            Reporter: Wolfgang Laun
>            Assignee: Edson Tirelli
>             Fix For: 5.2.1.Final
>
>
> declare Foo
>   clazz : Class
> end
> rule testFoo
> when
>     Foo( clazz == (java.lang.Object)  )
> then
>     System.out.println( "Foo is Object" );
> end
> causes
> Exception in thread "main" [Error: not a statement, or badly formed structure]
> [Near : {... (java.lang.Object) ....}]
>                                ^
> [Line: 1, Column: 19]
> 	at org.mvel2.compiler.ExpressionCompiler._compile(ExpressionCompiler.java:307)
> 	at org.mvel2.compiler.ExpressionCompiler.compile(ExpressionCompiler.java:69)
> 	at org.mvel2.MVEL.analysisCompile(MVEL.java:668)
> 	at org.mvel2.MVEL.analysisCompile(MVEL.java:672)
> 	at org.drools.rule.builder.PatternBuilder.setInputs(PatternBuilder.java:779)
> 	at org.drools.rule.builder.PatternBuilder.build(PatternBuilder.java:540)
> 	at org.drools.rule.builder.PatternBuilder.processConstraintsAndBinds(PatternBuilder.java:349)
> 	at org.drools.rule.builder.PatternBuilder.build(PatternBuilder.java:264)
> 	at org.drools.rule.builder.PatternBuilder.build(PatternBuilder.java:122)
> 	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:1889)
> 	at org.drools.compiler.PackageBuilder.addPackage(PackageBuilder.java:755)
> 	at org.drools.compiler.PackageBuilder.addPackageFromDrl(PackageBuilder.java:365)
> 	at org.drools.compiler.PackageBuilder.addKnowledgeResource(PackageBuilder.java:543)
> 	at org.drools.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.java:28)
> 	at listofthree.Main.setup(Main.java:55)
> 	at listofthree.Main.main(Main.java:107)
> Caused by: java.lang.NullPointerException
> 	at java.lang.Class.isAssignableFrom(Native Method)
> 	at org.mvel2.DataConversion.canConvert(DataConversion.java:104)
> 	at org.mvel2.ast.TypeCast.<init>(TypeCast.java:47)
> 	at org.mvel2.compiler.AbstractParser.nextToken(AbstractParser.java:1034)
> 	at org.mvel2.compiler.ExpressionCompiler._compile(ExpressionCompiler.java:135)
> 	... 17 more

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