/*
 * Copyright (c) 2019. 黄钰朝
 *
 * 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.hyc.wechat.util;

import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.util.Arrays;
import java.util.LinkedList;

/**
 * @author <a href="mailto:kobe524348@gmail.com">黄钰朝</a>
 * @program XHotel
 * @description 用于反射的工具
 * @date 2019-04-20 02:28
 */
public class ReflectUtils {

    /**
     * 获取指定对象的所有方法（包括其父类的方法）
     *
     * @param obj 需要获取方法的实例对象
     * @return 返回一个包含所有方法的LinkedList
     */
    public static LinkedList<Method> getMethods(Object obj) {
        return getMethods(obj.getClass());
    }

    /**
     * 获取指定类的所有方法（包括其父类的方法）
     *
     * @param clazz 需要获取方法的类
     * @return 返回一个包含所有方法的LinkedList
     */
    public static LinkedList<Method> getMethods(Class clazz) {
        LinkedList<Method> methods = new LinkedList<>();
        for (Class cla = clazz; cla != Object.class; cla = cla.getSuperclass()) {
            methods.addAll(Arrays.asList(cla.getDeclaredMethods()));
        }
        return methods;
    }

    /**
     * 获取指定对象的所有字段（包括其父类的字段）
     *
     * @param obj 需要获取字段的实例对象
     * @return 返回一个包含所有字段的LinkedList
     */
    public static LinkedList<Field> getFields(Object obj) {
        return getFields(obj.getClass());
    }

    /**
     * 获取指定类的所有字段（包括其父类的字段）
     *
     * @param clazz 需要获取字段的类
     * @return 返回一个包含所有字段的LinkedList
     */
    public static LinkedList<Field> getFields(Class clazz) {
        LinkedList<Field> fields = new LinkedList<>();
        for (Class cla = clazz; cla != Object.class; cla = cla.getSuperclass()) {
            fields.addAll(Arrays.asList(cla.getDeclaredFields()));
        }
        return fields;
    }
}