Problems with ElementType.TYPE_USE and reflection

[Kasper Nielsen]

Hi,

I'm trying to understand exactly how ElementType.TYPE_USE should work.

I'm asking because the following program only prints that s has one 2
annotation.
I believe it should either print 3 or be flagged at compilation time.

public class TestClass {

    @X
    @Y
    @Z
    String s;

    public static void main(String[] args) throws Exception {

System.out.println(TestClass.class.getDeclaredField("s").getAnnotations().length);
    }

    @Retention(RetentionPolicy.RUNTIME)
    @Target(ElementType.TYPE_USE)
    @interface X {}

    @Retention(RetentionPolicy.RUNTIME)
    @Target(ElementType.FIELD)
    @interface Y {}

    @Retention(RetentionPolicy.RUNTIME)
    @Target({ ElementType.FIELD, ElementType.TYPE_USE })
    @interface Z {}
}

ElementType.TYPE_USE alone isn't enough for the annotation information to
be retained at runtime.

/Kasper