Java Reflection Annotation getAnnotations(Class c, Class annotationClass)

Description

Finds the annotation objects of annotated fields.

License

Open Source License

Parameter

Parameter	Description
c	The class containing the fields.
annotationClass	The annotation.

Return

The annotations of the annotated fields.

Declaration

public static <T extends Annotation> List<T> getAnnotations(Class<?> c, Class<T> annotationClass) 

Method Source Code

//package com.java2s;
//License from project: Open Source License 

import java.lang.annotation.Annotation;
import java.lang.reflect.Field;

import java.util.LinkedList;
import java.util.List;

public class Main {
    /**//from  w ww. ja  va2s  . c  o m
     * Finds the annotation objects of annotated fields.
     *
     * @param c
     *          The class containing the fields.
     * @param annotationClass
     *          The annotation.
     * @return The annotations of the annotated fields.
     */
    public static <T extends Annotation> List<T> getAnnotations(Class<?> c, Class<T> annotationClass) {

        Field[] fields = c.getDeclaredFields();
        List<T> annotations = new LinkedList<>();
        for (Field field : fields) {
            T annotation = field.getAnnotation(annotationClass);
            if (annotation != null) {
                annotations.add(annotation);
            }
        }
        return annotations;
    }
}

Related

1. getAnnotations(AnnotatedElement ae, Class annotationType)
2. getAnnotations(AnnotatedElement annotated)
3. getAnnotations(Annotation[][] annotations)
4. getAnnotations(Class cls)
5. getAnnotations(Class annotationClass, Annotation[] annotations)
6. getAnnotations(Class annotation, Collection annotations)
7. getAnnotations(Class ann, Object o, Method m, int param)
8. getAnnotations(Enum targetEnum, Class targetAnnotationClass)
9. getAnnotations(Field field)