[GROOVY-3493] Cannot override methods via metaclass that are part of an interface implementation

• Type: Bug
• Status: Closed
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 1.6.2
• Fix Version/s: 4.0.0-rc-2
• Component/s: groovy-runtime
• Assignee: Eric Milles
• Reporter: Luke Daley
• Created: 28/Apr/09 18:53
• Updated: 03/Feb/22 22:29
• Resolved: 13/Dec/21 19:44

Description

The following works...

class T {
       def doIt() { true }
}

def t = new T()

assert t.doIt()
t.metaClass.doIt = { -> false }
assert !t.doIt()

But this fails...

interface I {
       def doIt()
}

class T implements I {
       def doIt() { true }
}

def t = new T()

assert t.doIt()
t.metaClass.doIt = { -> false }
assert !t.doIt()

Issue Links

• is duplicated by: GROOVY-4210 String(Buffer|Builder).metaClass.toString ignored