/**
* Returns all the annotations of this class. If there are no annotations then an empty array is
* returned.
*
* @return a copy of the array containing this class' annotations.
* @see #getDeclaredAnnotations()
*/
public Annotation[] getAnnotations() {
/*
* We need to get the annotations declared on this class, plus the
* annotations from superclasses that have the "@Inherited" annotation
* set. We create a temporary map to use while we accumulate the
* annotations and convert it to an array at the end.
*
* It's possible to have duplicates when annotations are inherited.
* We use a Map to filter those out.
*
* HashMap might be overkill here.
*/
HashMap<Class, Annotation> map = new HashMap<Class, Annotation>();
Annotation[] declaredAnnotations = getDeclaredAnnotations();
for (int i = declaredAnnotations.length - 1; i >= 0; --i) {
map.put(declaredAnnotations[i].annotationType(), declaredAnnotations[i]);
}
for (Class<?> sup = getSuperclass(); sup != null; sup = sup.getSuperclass()) {
declaredAnnotations = sup.getDeclaredAnnotations();
for (int i = declaredAnnotations.length - 1; i >= 0; --i) {
Class<?> clazz = declaredAnnotations[i].annotationType();
if (!map.containsKey(clazz) && clazz.isAnnotationPresent(Inherited.class)) {
map.put(clazz, declaredAnnotations[i]);
}
}
}
/* convert annotation values from HashMap to array */
Collection<Annotation> coll = map.values();
return coll.toArray(new Annotation[coll.size()]);
}
