package me.zhengjie.common.utils;

import me.zhengjie.common.exception.BadRequestException;

import java.util.Optional;

/**

 * 验证工具

 * @author jie

 * @date 2018-11-23

 */

public class ValidationUtil {

    /**

     * 验证空

     * @param optional

     */

    public static void isNull(Optional optional, String entity,String parameter , Object value){

        if(!optional.isPresent()){

            String msg = entity

                         + " 不存在 "

                         +"{ "+ parameter +":"+ value.toString() +" }";

            throw new BadRequestException(msg);

        }

    }

    /**

     * 验证是否为邮箱

     * @param string

     * @return

     */

    public static boolean isEmail(String string) {

        if (string == null){

            return false;

        }

        String regEx1 = "^([a-z0-9A-Z]+[-|\\.]?)+[a-z0-9A-Z]@([a-z0-9A-Z]+(-[a-z0-9A-Z]+)?\\.)+[a-zA-Z]{2,}$";

        return string.matches(regEx1);

    }

}