[GROOVY-5732] Delegating to an abstract class hierarchy doesn't implement interfaces at a higher level

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.8.6
• Fix Version/s: 2.0.5, 2.1.0-beta-1, 1.8.9
• Component/s: command line processing
• Labels: @Delegate delegation
• Environment: Mac OS X 10.6.8, Eclipse 3.7
• Assignee: Paul King
• Reporter: Paul Bennett
• Created: 28/Sep/12 11:27
• Updated: 04/Oct/12 17:02
• Resolved: 29/Sep/12 02:17

Description

Given:

public interface Field {	
	public void aFieldMethod();
}

and the classes:

public abstract class AbstractBaseClass implements Field {
}

public abstract class DelegatedClass extends AbstractBaseClass {
}

class Delegator {
	@Delegate private DelegatedClass delegate
}

then

assert Field.isAssignableFrom(Delegator)

fails. If Delegator is defined as

class Delegator {
	@Delegate private AbstractBaseClass delegate
}

the test succeeds