Injected services become null in Custom Constraint Validators

Question

I have tried to create a custom annotation with a constraint validator in the spring boot framework and I'm getting an error of injected services being null when executing the custom validator.

And, I have checked with the previous answers related to this. But, any answer didn't work for me now.

Some of them are as follows,

javax.validation.ValidationException: HV000064: Unable to instantiate ConstraintValidator

Autowired gives Null value in Custom Constraint validator

http://dolszewski.com/spring/custom-validation-annotation-in-spring/

My custom annotation and constraint validator as follows,

Custom Annotation

@Documented
@Retention(RetentionPolicy.RUNTIME)
@Target({ElementType.FIELD, ElementType.PARAMETER})
@Constraint(validatedBy = UniqueFoodNameValidator.class)
public @interface UniqueFoodName {
    String message() default "{UniqueFoodName}";

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

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

Custom Constraint Validator

public class UniqueFoodNameValidator implements ConstraintValidator<UniqueFoodName, String> {

    private FoodService foodService;

    @Autowired
    public UniqueFoodNameValidator(FoodService foodService) {
        this.foodService = foodService;
    }

    @Override
    public void initialize(UniqueFoodName constraintAnnotation) {

    }

    @Override
    public boolean isValid(String foodName, ConstraintValidatorContext context) {
        return Objects.isNull(foodName) || foodService.get(foodName).isEmpty();
    }
}

So, I would really appreciate If someone cloud help me to figure out the issue and to resolve this.

Note that: FoodService is an interface and it's methods implemented in the FoodServiceImpl class.

Injected services become null in Custom Constraint Validators

0 Answers0