custom-hibernate-class-type-validator

custom-hibernate-class-type-validator.java

package com.example.demo.validation;

import lombok.Getter;
import lombok.NoArgsConstructor;
import lombok.Setter;
import org.springframework.validation.annotation.Validated;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import javax.validation.*;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import java.util.regex.Pattern;

@Validated
@RestController
@RequestMapping(path = "/demo")
public class OptionValidController {

    @PostMapping(path = "/person")
    public Person doSomething(@Valid @RequestBody Person person) {
        return person;
    }

    @PostMapping(path = "/station")
    public Station doSomething(@RequestBody Station station) {
        return station;
    }

    @Constraint(validatedBy = {PersonClassOptionalEmailValidator.class})
    @Target({ElementType.TYPE})
    @Retention(RetentionPolicy.RUNTIME)
    public @interface PersonalEmailValid {
        String message() default "Invalid Email address";

        Class<?>[] groups() default {};

        Class<? extends Payload>[] payload() default {};

    }

    public static class PersonClassOptionalEmailValidator implements ConstraintValidator<PersonalEmailValid, Person> {
        public static final String EMAIL_REGEX = "^[a-zA-Z0-9+_.-]+@[a-zA-Z0-9.-]+$";
        private final Pattern pattern;


        public PersonClassOptionalEmailValidator() {
            pattern = Pattern.compile(EMAIL_REGEX);
        }

        @Override
        public boolean isValid(Person person, ConstraintValidatorContext constraintValidatorContext) {
            if (person.contactInformation != null) {
                return pattern.matcher(person.contactInformation.email).matches();
            }
            return false;
        }
    }

    @Getter
    @Setter
    @NoArgsConstructor
    static class ContactInformation {
        String phone;
        String email;
    }

    @Getter
    @Setter
    @NoArgsConstructor
    @PersonalEmailValid
    static class Person {
        @Valid
        ContactInformation contactInformation;
    }

    @Getter
    @Setter
    @NoArgsConstructor
    static class Station {
        @Valid
        ContactInformation contactInformation;
    }
}