[GROOVY-4415] Error implementing a Java or Groovy generic interface

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.7.3
• Fix Version/s: 1.8.5, 2.0-beta-2, 1.7.11
• Environment: Groovy 1.7.3 - Eclipse
• Assignee: Cédric Champeau
• Reporter: Luciano Greiner
• Created: 12/Sep/10 20:44
• Updated: 24/Dec/11 03:08
• Resolved: 29/Nov/11 11:15

Description

Hello.

I have an issue creating a Groovy class implementing an interface coded in Java with Generics:
Here is the code:

/* Java interface */
public interface Entity<T> {
	T getId();	
}

/* Groovy class */
class Car implements Entity<Long> {
      Long id;
}

Car groovy class has a Long getId() method already, but it doesn't recognize it's enough to implement the interface method:
"Can't have an abstract method in a non-abstract class. The class 'Car' must be declared abstract or the method 'java.lang.Object getId()' must be implemented."

The same happens when the interface is coded in Groovy instead of Java.

I believe it's an important thing to support.

I am using Groovy 1.7.3.

Thank you.

Issue Links

• is related to: GROOVY-4645 Convariant returns causes compiler to fail when generating property getters