Java Utililty Methods Reflection Annotation

List of utility methods to do Reflection Annotation

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Description

The list of methods to do Reflection Annotation are organized into topic(s).

Method

TgetAnnotation(final AnnotatedElement anElement, final Class annotationClass)
get Annotation 
return anElement != null ? (T) anElement.getAnnotation(annotationClass) : null;
TgetAnnotation(final Method method, final Class annotationClass)
get Annotation 
final T annotation = method.getAnnotation(annotationClass);
if (annotation != null) {
    return annotation;
final Class<?> declaringClass = method.getDeclaringClass();
Class<?> currentSuperClass = declaringClass.getSuperclass();
while (currentSuperClass != null) {
    try {
...
TgetAnnotation(@Nonnull Annotation[] annotations, @Nonnull Class annotation)
Retrieve the annotation of given type from array of annotations 
if (annotations == null || annotations.length == 0) {
    return null;
for (Annotation a : annotations) {
    if (annotation.isAssignableFrom(a.getClass())) {
        return (T) a;
return null;
AgetAnnotation(@Nonnull Class cls, @Nonnull Class annotation)
get Annotation 
return annotation.cast(cls.getAnnotation(annotation));
TgetAnnotation(AnnotatedElement ae, Class annotationType)
Get a single Annotation of annotationType from the supplied Method, Constructor or Field. 
T ann = ae.getAnnotation(annotationType);
if (ann == null) {
    for (Annotation metaAnn : ae.getAnnotations()) {
        ann = metaAnn.annotationType().getAnnotation(annotationType);
        if (ann != null) {
            break;
return ann;
ObjectgetAnnotation(AnnotatedElement aobj, Class aClass)
Get annotation of an object via reflection 
for (Object a : aobj.getAnnotations()) {
    if (isAnnotationInstance(aClass, a))
        return a;
return null;
AnnotationgetAnnotation(AnnotatedElement element, Class annotation)
get Annotation 
return element.getAnnotation(annotation);
AnnotationgetAnnotation(AnnotatedElement element, String annotationTypeName)
get Annotation 
Class<?> annotationType = null; 
try {
    annotationType = Class.forName(annotationTypeName);
} catch (Exception ex) {
    throw new IllegalArgumentException(ex);
return element.getAnnotation(annotationType.asSubclass(Annotation.class));
AnnotationgetAnnotation(AnnotatedElement target, String annotationType)
get Annotation 
for (Annotation annotation : target.getAnnotations()) {
    if (annotationType.equals(annotation.annotationType().getName())) {
        return annotation;
return null;
TgetAnnotation(Annotation ann, Class annotationType)
get Annotation 
if (annotationType.isInstance(ann)) {
    return (T) ann;
return ann.annotationType().getAnnotation(annotationType);