[GROOVY-6041] Cannot implement method from java interface with varargs and generics

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.0.7, 2.1.1
• Fix Version/s: 2.1.2, 2.0.8
• Component/s: Compiler
• Assignee: Cédric Champeau
• Reporter: Graeme Rocher
• Created: 11/Mar/13 04:41
• Updated: 15/Oct/15 18:19
• Resolved: 13/Mar/13 03:50

Description

If Java interface defines a method like

<T> Promise<java.util.List<T>> createPromise(Promise<T>...promises);

It is impossible to implement this in Groovy due to a compilation error such as

Groovyc: Can't have an abstract method in a non-abstract class. The class 'org.grails.async.factory.gpars.GparsPromiseFactory' must be declared abstract or the method 'grails.async.Promise createPromise([Lgrails.async.Promise;)' must be implemented.