get Fields With Annotation - Java Reflection

Java examples for Reflection:Field Get

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Description

get Fields With Annotation

Demo Code

/*/*from  w w  w .j  a v  a  2s.c  om*/
 * JBoss, Home of Professional Open Source
 * Copyright 2009, Red Hat Middleware LLC, and individual contributors
 * by the @authors tag. See the copyright.txt in the distribution for a
 * full listing of individual contributors.
 *
 * 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.security.AccessController;
import java.security.PrivilegedAction;

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

public class Main {
    public static List<Field> getFieldsWithAnnotation(
            final Class<?> source,
            final Class<? extends Annotation> annotationClass) {
        List<Field> declaredAccessableFields = AccessController
                .doPrivileged(new PrivilegedAction<List<Field>>() {
                    public List<Field> run() {
                        List<Field> foundFields = new ArrayList<Field>();
                        Class<?> nextSource = source;
                        while (nextSource != Object.class) {
                            for (Field field : nextSource
                                    .getDeclaredFields()) {
                                if (field
                                        .isAnnotationPresent(annotationClass)) {
                                    if (!field.isAccessible()) {
                                        field.setAccessible(true);
                                    }
                                    foundFields.add(field);
                                }
                            }
                            nextSource = nextSource.getSuperclass();
                        }
                        return foundFields;
                    }
                });
        return declaredAccessableFields;
    }
}

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