Annotation is not inherited from interface method
From the @Inherited javadoc:
Note that this meta-annotation type has no effect if the annotated type is used to annotate anything other than a class. Note also that this meta-annotation only causes annotations to be inherited from superclasses; annotations on implemented interfaces have no effect.`
In summary, it doesn't apply to methods.
Alternatively, you can use reflection to derive the same information. The method printMethodAnnotations
can be rewritten as:
private static void printMethodAnnotations(Method m) {
Class<?> methodDeclaredKlass = m.getDeclaringClass();
List<Class<?>> interfases = org.apache.commons.lang3.ClassUtils.getAllInterfaces(methodDeclaredKlass);
List<Annotation> annotations = new ArrayList<>();
annotations.addAll(Arrays.asList(m.getAnnotations()));
for (Class<?> interfase : interfases) {
for (Method interfaseMethod : interfase.getMethods()) {
if (areMethodsEqual(interfaseMethod, m)) {
annotations.addAll(Arrays.asList(interfaseMethod.getAnnotations()));
continue;
}
}
}
System.out.println(m + "*: " + annotations);
}
private static boolean areMethodsEqual(Method m1, Method m2) {
// return type, Modifiers are not required to check, if they are not appropriate match then it will be a compile
// time error. This needs enhancements for Generic types parameter ?
return m1.getName().equals(m2.getName()) && Arrays.equals(m1.getParameterTypes(), m2.getParameterTypes());
}
From the javadocs of java.lang.annotation.Inherited
:
Note that this meta-annotation type has no effect if the annotated type is used to annotate anything other than a class. Note also that this meta-annotation only causes annotations to be inherited from superclasses; annotations on implemented interfaces have no effect.