@Documented @Retention(value=RUNTIME) @Target(value=ANNOTATION_TYPE) public @interface SubtypeOf
QualifierHierarchy
or TypeHierarchy
.)
Example:
@SubtypeOf( { Nullable.class } ) public @interface NonNull { }
For the top qualifier in the qualifier hierarchy (i.e., the qualifier that is a supertype of all other qualifiers in the given hierarchy), use an empty set of values:
@SubtypeOf( { } )
public @interface Nullable { }
@SubtypeOf( {} )
public @interface MaybeAliased { }
Together, all the @SubtypeOf meta-annotations fully describe the type qualifier hierarchy.
Modifier and Type | Required Element and Description |
---|---|
Class<? extends Annotation>[] |
value
An array of the supertype qualifiers of the annotated qualifier.
|
public abstract Class<? extends Annotation>[] value