[GROOVY-4953] NPE possibly related to PojoWrapper

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.8.1
• Fix Version/s: 1.8.2, 1.9-beta-3, 1.7.11
• Assignee: Jochen Theodorou
• Reporter: Jeff Brown
• Created: 29/Jul/11 15:59
• Updated: 29/Aug/11 14:05
• Resolved: 29/Aug/11 14:05

Description

Widget.groovy

class Widget {
}

testscript.groovy

Widget.metaClass.invokeMethod = { String methodName, Object[] args ->
    
    args.each { a ->
        println a.class
    }
}

w = new Widget()

w.doSometing([] as Object[])

With Groovy 1.8.0:

pojoproblem $ groovy -version
Groovy Version: 1.8.0 JVM: 1.6.0_26
pojoproblem $ groovy testscript.groovy 
class [Ljava.lang.Object;

With Groovy 1.8.1:

pojoproblem $ groovy -version
Groovy Version: 1.8.1 JVM: 1.6.0_26
pojoproblem $ groovy testscript.groovy 
Caught: java.lang.NullPointerException
java.lang.NullPointerException
	at testscript$_run_closure1_closure2.doCall(testscript.groovy:4)
	at testscript$_run_closure1.doCall(testscript.groovy:3)
	at testscript.run(testscript.groovy:10)

I think (not 100% sure) the NPE is related to the delegate property in PojoWrapper being null. PojoWrapper.getProperty(String) is called, which looks like this:

    public Object getProperty(final String property) {
        return this.delegate.getProperty(this.wrapped, property);
    }

Is the wrapper really supposed to be passed into the closure or is it supposed to be the unwrapped object?