package com.zy.common.utils;
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import com.core.common.Cools;
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import java.lang.reflect.Field;
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import java.lang.reflect.Modifier;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.List;
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/**
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* 反射工具类
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* Created by vincent on 2019/1/3
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*/
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public class ReflectUtils {
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/**
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* 获取指定Class（及其SuperClass）的成员变量
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*/
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public static Field[] getAllFields(Class<?> cls){
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return getAllFields(cls, null);
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}
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/**
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* 递归合并基类Field
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*/
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private static Field[] getAllFields(Class<?> cls, Field[] params){
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Field[] fields = (params == null) ? cls.getDeclaredFields() : params;
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Class<?> superCls = cls.getSuperclass();
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if (superCls == null || superCls == Object.class){
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return fields;
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}
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Field[] superClsFields = superCls.getDeclaredFields();
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fields = Cools.addAll(fields, superClsFields);
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return getAllFields(superCls, fields);
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}
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/**
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* 删除Field数组的静态成员变量
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*/
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public static Field[] removeStaticField(Field[] params){
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List<Field> fields = new ArrayList<>(Arrays.asList(params));
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if (fields.size() == 0){
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return null;
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}
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for (int i = fields.size() - 1; i >= 0; i--) {
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if(fields.get(i) == null){
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fields.remove(i);
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} else if (Modifier.isStatic(fields.get(i).getModifiers())) {
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fields.remove(i);
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i++;
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}
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}
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return fields.toArray(new Field[0]);
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}
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/**
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* 递归获取成员变量对象（包含其基类）
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*/
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public static Field getField(Class<?> cls, String fieldName){
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Field field;
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try {
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field = cls.getDeclaredField(fieldName);
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} catch (NoSuchFieldException e) {
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Class<?> superCls = cls.getSuperclass();
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if (superCls == null || superCls == Object.class){
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return null;
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}
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return getField(superCls, fieldName);
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}
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return field;
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}
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}
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