package com.example.springboot.util;

import org.hibernate.validator.HibernateValidator;

import javax.validation.ConstraintViolation;
import javax.validation.Validation;
import javax.validation.Validator;
import java.util.Set;

/**
 * hibernate-validator校验工具类
 * 参考文档：http://docs.jboss.org/hibernate/validator/5.4/reference/en-US/html_single/
 */
public class ValidatorUtil {
    private static Validator validator;

    static {
        validator = Validation.byProvider(HibernateValidator.class).configure().failFast(true).buildValidatorFactory().getValidator();
    }

    /**
     * ValidatorUtil.validateEntity(role);
     * 在controller接口中使用此方便校验实体参数的合法校验对象
     *
     * @param object 待校验对象
     * @param groups 待校验的组
     */
    public static void validateEntity(Object object, Class<?>... groups) {
        Set<ConstraintViolation<Object>> constraintViolations = validator.validate(object, groups);
        if (!constraintViolations.isEmpty()) {
            StringBuilder msg = new StringBuilder();
            for (ConstraintViolation<Object> constraint : constraintViolations) {
                msg.append(constraint.getMessage()).append(",");
            }
            throw new RuntimeException(msg.toString());
        }
    }
}