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  1. JDK
  2. JDK-8140633

Method.getAnnotatedReturnType() returns empty annotations if return type is an a

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    Details

    • Type: Bug
    • Status: Resolved
    • Priority: P4
    • Resolution: Not an Issue
    • Affects Version/s: 8, 9
    • Fix Version/s: None
    • Component/s: core-libs
    • Labels:

      Description

      FULL PRODUCT VERSION :
      java version "1.8.0_60"
      Java(TM) SE Runtime Environment (build 1.8.0_60-b27)
      Java HotSpot(TM) 64-Bit Server VM (build 25.60-b23, mixed mode)

      ADDITIONAL OS VERSION INFORMATION :
      Microsoft Windows [Version 6.1.7601]

      A DESCRIPTION OF THE PROBLEM :
      If the return type of a method is an array it's not possible to get its type annotations with the method java.lang.reflect.Method.getAnnotatedReturnType()


      STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
      Run the source code attached below.


      EXPECTED VERSUS ACTUAL BEHAVIOR :
      EXPECTED -
      sayHello:@AnnotationTest$MyAnnotation(value=sayHello)
      sayHello1:@AnnotationTest$MyAnnotation(value=sayHello1)
      sayHello2:@AnnotationTest$MyAnnotation(value=sayHello2)
      ACTUAL -
      sayHello:@AnnotationTest$MyAnnotation(value=sayHello)
      sayHello1:@AnnotationTest$MyAnnotation(value=sayHello1)

      REPRODUCIBILITY :
      This bug can be reproduced always.

      ---------- BEGIN SOURCE ----------
      import java.lang.annotation.Annotation;
      import java.lang.annotation.ElementType;
      import java.lang.annotation.Retention;
      import java.lang.annotation.RetentionPolicy;
      import java.lang.annotation.Target;
      import java.lang.reflect.AnnotatedType;
      import java.lang.reflect.Method;
      import java.util.List;

      public class AnnotationTest {

        @Target({ ElementType.TYPE_PARAMETER, ElementType.TYPE_USE })
        @Retention(RetentionPolicy.RUNTIME)
        public @interface MyAnnotation {
          String value();
        }

        public interface ToImplement {

          public @MyAnnotation("sayHello") String sayHello();

          public @MyAnnotation("sayHello1") List<String> sayHello1();

          public @MyAnnotation("sayHello2") String[] sayHello2();
        }

        public static void main(String[] args) throws Exception {
          for (Method m : ToImplement.class.getMethods()) {
            AnnotatedType returnType = m.getAnnotatedReturnType();
            for (Annotation a : returnType.getAnnotations()) {
              System.out.println(m.getName() + ":" + a);
            }
          }

        }

      }
      ---------- END SOURCE ----------

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            Assignee:
            jfranck Joel Borggrén-Franck
            Reporter:
            webbuggrp Webbug Group
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              Dates

              Created:
              Updated:
              Resolved: