Example usage for java.lang.reflect AnnotatedElement getAnnotation

Introduction

In this page you can find the example usage for java.lang.reflect AnnotatedElement getAnnotation.

Prototype

<T extends Annotation> T getAnnotation(Class<T> annotationClass);

Source Link

Document

Returns this element's annotation for the specified type if such an annotation is present, else null.

Usage

From source file:org.springframework.core.annotation.AnnotationUtils.java

/**
 * Get a single {@link Annotation} of {@code annotationType} from the supplied
 * {@link AnnotatedElement}, where the annotation is either <em>present</em> or
 * <em>meta-present</em> on the {@code AnnotatedElement}.
 * <p>Note that this method supports only a single level of meta-annotations.
 * For support for arbitrary levels of meta-annotations, use
 * {@link #findAnnotation(AnnotatedElement, Class)} instead.
 * @param annotatedElement the {@code AnnotatedElement} from which to get the annotation
 * @param annotationType the annotation type to look for, both locally and as a meta-annotation
 * @return the first matching annotation, or {@code null} if not found
 * @since 3.1//from  w  w w. j ava2s  .c o  m
 */
@Nullable
public static <A extends Annotation> A getAnnotation(AnnotatedElement annotatedElement,
        Class<A> annotationType) {
    try {
        A annotation = annotatedElement.getAnnotation(annotationType);
        if (annotation == null) {
            for (Annotation metaAnn : annotatedElement.getAnnotations()) {
                annotation = metaAnn.annotationType().getAnnotation(annotationType);
                if (annotation != null) {
                    break;
                }
            }
        }
        return (annotation != null ? synthesizeAnnotation(annotation, annotatedElement) : null);
    } catch (Throwable ex) {
        handleIntrospectionFailure(annotatedElement, ex);
        return null;
    }
}