package com.dorago.syjapi.common.util;

import com.dorago.syjapi.common.Result;

import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.List;
import java.util.Map;
import java.util.Set;

/**
 * @Auther: luoyang
 * @Date: 2020/8/27 15:06
 * @Description:判断参数不能为空
 */
public class IsNotEmptyUtil {

    /**
     * @param object 类
     * @param canNullParam 可以为空的字段 "," 逗号分隔
     * @attention 当类中有基本数据类型时判断无效，只判断引用类型 如：int 不生效 Integer 生效
     * @return
     */
    public static Result hasEmpty(Object object,String canNullParam) {
        Class<?> aClass = object.getClass();
        Field[] declaredFields = aClass.getDeclaredFields();
        try {
            for (Field field : declaredFields){
                String name = field.getName();
                String[] split = canNullParam.split(",");
                int fz=0;//阀值
                for (String s : split) {
                    if(name.toLowerCase().equals(s.toLowerCase())){
                        fz++;
                    }
                }
                if(fz>0){
                    continue;
                }
                name = name.substring(0, 1).toUpperCase() + name.substring(1);

                String type = field.getGenericType().toString();
                Method method = aClass.getMethod("get" + name);
                if (type.contains("Integer")||type.contains("Long")||type.contains("Boolean")||type.contains("Byte")||type.contains("Character")
                        ||type.contains("Double")||type.contains("Float")||type.contains("Short")) {
                    if (method.invoke(object)==null) {
                        return Result.buildFail(field.getName()+"不能为空");
                    }
               }else if(type.equals("interface java.util.Set")){
                    Set value = (Set) method.invoke(object);
                    if (value==null && value.isEmpty()) {
                        return Result.buildFail(field.getName()+"不能为空");
                    }
                }else if(type.equals("interface java.util.List")){
                    List value = (List) method.invoke(object);
                    if (value==null && value.isEmpty()) {
                        return Result.buildFail(field.getName()+"不能为空");
                    }
                }else if(type.equals("interface java.util.Map")){
                    Map value = (Map) method.invoke(object);
                    if (value==null && value.isEmpty()) {
                        return Result.buildFail(field.getName()+"不能为空");
                    }
                }
            }
        } catch (NoSuchMethodException e) {
            e.printStackTrace();
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        } catch (InvocationTargetException e) {
            e.printStackTrace();
        }
        return Result.buildSuccess();
    }
}