[GROOVY-2412] Need to access the metaClass of a subclass before receiving the dynamic methods that are added to the superclass

• Type: Sub-task
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.5
• Component/s: groovy-runtime
• Environment: Groovy Version: 1.5.0 JVM: 1.6.0_03-b05
• Assignee: Unassigned
• Reporter: René de Bloois
• Created: 18/Dec/07 06:07
• Updated: 22/Dec/23 11:38
• Resolved: 11/Jul/23 21:18

Description

This script works:

class Super
{
	def test2() { println "test2" }
}

Super.metaClass.test3 = { println "test3" }

class Sub extends Super
{
	def test4() { println "test4"; super.test3() }
}

Sub.metaClass // Does not work without this line

new Super().test2()
new Super().test3()
new Sub().test2()
new Sub().test3()
new Sub().test4()

It outputs:

test2
test3
test2
test3
test4
test3

But when I remove the commented line (Sub.metaClass), it does not work anymore. You get the following stacktrace:

test2
test3
test2
Caught: groovy.lang.MissingMethodException: No signature of method: Sub.test3() is applicable for argument types: () values: {}
        at Super.invokeMethod(test1.groovy)
        at test1.run(test1.groovy:18)
        at test1.main(test1.groovy)

I think that calling Sub.metaClass should not have such a sideeffect.
The script should work with or without it.

Issue Links

• depends upon: GROOVY-2503 MOP 2.0 design inflluencing issues