Java Utililty Methods Reflection Annotation

return annotatedClass.getAnnotation(annotationClass);

T res = null;
if (!Modifier.isAbstract(type.getModifiers())) {
    Class<?> supertype = type;
    while (supertype != null && Object.class != supertype) {
        if (supertype.isAnnotationPresent(annotation)) {
            res = supertype.getAnnotation(annotation);
            break;
        supertype = supertype.getSuperclass();
return res;

final Annotation ann = obj.getAnnotation(reference);
return ann == null ? null : (ANN) ann;

for (final AnnotatedElement element : elements) {
    final ANNOTATION annotation = element.getAnnotation(annotationClass);
    if (annotation != null) {
        return annotation;
return null;

if (member instanceof Field) {
    return ((Field) member).getAnnotation(annotation);
if (member instanceof Method) {
    return ((Method) member).getAnnotation(annotation);
throw new IllegalArgumentException("Member is neither field nor method: " + member);

T annotation = method.getAnnotation(annotationClass);
if (annotation != null)
    return annotation;
final Class<?> declaringClass = method.getDeclaringClass();
Class<?> superClass = declaringClass.getSuperclass();
while (superClass != null) {
    try {
        final Method superClassMethod = superClass.getDeclaredMethod(method.getName(),
...

final Class<?> type = obj instanceof Class<?> ? (Class<?>) obj : obj.getClass();
return type.getAnnotation(annoType);

if (object == null)
    throw new IllegalArgumentException("object cannot be null in getAnnotation()");
if (annotationClass == null)
    throw new IllegalArgumentException("annotationClass cannot be null in getAnnotation()");
final Class<? extends Object> clazz = object.getClass();
A result = null;
for (Class<?> c = clazz; c != null; c = c.getSuperclass()) {
    result = c.getAnnotation(annotationClass);
...

if (m == null || annotationClass == null)
    return null;
if (m instanceof Constructor)
    return ((Constructor<?>) m).getAnnotation(annotationClass);
else
    return ((Method) m).getAnnotation(annotationClass);

return m.getAnnotation(annotationClass);