play.libs

Class AnnotationUtils

Object

play.libs.AnnotationUtils

public class AnnotationUtils
extends Object

Annotation utilities.

Constructor Summary

Constructors

Constructor and Description
AnnotationUtils()

Method Summary

Modifier and Type	Method and Description
static <A extends Annotation> List<Annotation>	getIndirectlyPresentAnnotations(A maybeContainerAnnotation) If the return type of an existing value() method of the passed annotation is an Annotation[] array and the annotations inside that Annotation[] array are annotated with the Repeatable annotation the annotations of that array will be returned.
static <A extends Annotation> Annotation[]	unwrapContainerAnnotations(A[] annotations) Returns a new array whose entries do not contain container annotations anymore but the indirectly present annotation(s) a container annotation was wrapping instead.

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

AnnotationUtils

public AnnotationUtils()

Method Detail

unwrapContainerAnnotations

public static <A extends Annotation> Annotation[] unwrapContainerAnnotations(A[] annotations)

Returns a new array whose entries do not contain container annotations anymore but the indirectly present annotation(s) a container annotation was wrapping instead. An annotation is considered a container annotation if its indirectly present annotation(s) are annotated with Repeatable. Annotations inside the given array which don't meet the above definition of a container annotations will be returned untouched.

Parameters:

annotations - An array of annotations to unwrap. Can contain both container and non container annotations.

Returns:

A new array without container annotations but the container annotations' indirectly defined annotations.

getIndirectlyPresentAnnotations

public static <A extends Annotation> List<Annotation> getIndirectlyPresentAnnotations(A maybeContainerAnnotation)

If the return type of an existing value() method of the passed annotation is an Annotation[] array and the annotations inside that Annotation[] array are annotated with the Repeatable annotation the annotations of that array will be returned. If the passed annotation does not have a value() method or the above criteria are not met an empty list will be returned instead.

Parameters:

maybeContainerAnnotation - The annotation which value() method will be checked for other annotations

Returns:

The annotations defined by the value() method or an empty list.