get Annotated Fields - Java java.lang.annotation

Java examples for java.lang.annotation:Field Annotation

  1. HOME
  2. Java
  3. java.lang.annotation
  4. Field Annotation

Description

get Annotated Fields

Demo Code

/* Copyright (c) 2011 Danish Maritime Authority.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License./*from  ww  w  .  j  a v  a 2  s.com*/
 */
//package com.java2s;
import java.lang.annotation.Annotation;
import java.lang.reflect.Field;

import java.util.HashMap;
import java.util.Map;

public class Main {


    public static <T extends Annotation> Map<Field, T> getAnnotatedFields(
            Class<?> type, Class<T> annotation) {
        final Map<Field, T> fields = new HashMap<>();
        while (type != Object.class) {
            for (Field field : type.getDeclaredFields()) {
                if (field.isAnnotationPresent(annotation)) {
                    fields.put(field, field.getAnnotation(annotation));
                }
            }
            type = type.getSuperclass();
        }
        return fields;
    }
}

Related Tutorials