How do i inject ConstrainValidator?

Question

Imagine i have an annotation A

@Target({TYPE})
@Retention(RUNTIME)
@Documented
@Constraint(validatedBy = {Validator.class})
public @interface A {

   String value() default "";

   String message() default "{javax.validation.constraints.form.customization.message}";

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

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

that has a Constraint Validator which is not an implementation of ConstraintValidator rather an extension of one

public interface Validator extends ConstraintValidator<A, Entity> {
}

And then some implementation of Validator. Is there any way i can make it work with Spring, dependency injection and all that good stuff? Thank you

Does `@Component` on the implementation of `Validator` not work? — Prashant, May 30 '21 at 15:13
Hahaha, can you please provide more information. With the information provided, this would be closest guess I could make. — Prashant, May 30 '21 at 16:27
validatedBy should point to a concrete class, not an interface. But you can assign multiple validators... like `@Constraint(validatedBy = {AValidator.class, BValidator})` — Dirk Deyne, May 30 '21 at 17:53
@DirkDeyne i don't really get how multiple validators will help in my situation) There has to be a way through some configuration — Bulat Gimazov, May 30 '21 at 17:58

score 1 · Accepted Answer · answered May 30 '21 at 20:16

Okkkkkkkkkkkkk, it's actually possible.

Turns out this question is kind of a copy of another one. The only thing is it won't work just yet. Here's the final piece of code you have to add to your configuration.

    @Bean
    Validator validatorFactory() {
        ValidatorFactory validatorFactory = Validation.byDefaultProvider()
                .configure()
                .constraintValidatorFactory(new SpringConstraintValidatorFactoryEx())
                .buildValidatorFactory();

        return validatorFactory.getValidator();
    }

It's from Hibernate documentation in case someone is wondering

How do i inject ConstrainValidator?

1 Answers1