get Fields from class By annotation - Java java.lang.annotation

Java examples for java.lang.annotation:Field Annotation

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Description

get Fields from class By annotation

Demo Code

/**/*from   w  ww.j ava2 s. c o m*/

   Copyright 2011 Eric Haddad Koenig

   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.
 */
//package com.java2s;
import java.lang.annotation.Annotation;
import java.lang.reflect.Field;

import java.util.ArrayList;
import java.util.List;

public class Main {

    public static List<Field> getFields(Class<?> objectClass,
            Class<? extends Annotation> annotationClass) {
        List<Field> fields = new ArrayList<Field>();
        getFields(objectClass, annotationClass, fields);
        return fields;
    }

    public static void getFields(Class<?> objectClass,
            Class<? extends Annotation> annotationClass, List<Field> fields) {
        if (objectClass != null) {
            Field[] declaredFields = objectClass.getDeclaredFields();
            for (Field field : declaredFields) {
                if (field.isAnnotationPresent(annotationClass)) {
                    fields.add(field);
                }
            }
            getFields(objectClass.getSuperclass(), annotationClass, fields);
        }
    }
}

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