groovy
  1. groovy
  2. GROOVY-4415

Error implementing a Java or Groovy generic interface

    Details

    • Type: Bug Bug
    • Status: Closed Closed
    • Priority: Major Major
    • Resolution: Fixed
    • Affects Version/s: 1.7.3
    • Fix Version/s: 1.8.5, 2.0-beta-2, 1.7.11
    • Component/s: None
    • Labels:
      None
    • Environment:
      Groovy 1.7.3 - Eclipse
    • Number of attachments :
      0

      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.

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            • Assignee:
              CÚdric Champeau
              Reporter:
              Luciano Greiner
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              • Created:
                Updated:
                Resolved: