Is it possible to intercept an exception thrown from a custom annotation validator in Spring Boot?

Question

I'm experimenting with the custom validator annotation with spring boot in my rest application.

here is the sample code from the validator, other requisite classes are present:

public class CustomerValidator implements ConstraintValidator<CustomerValidation, Customer>
{
    public boolean isValid(Customer value, ConstraintValidatorContext cxt) {
   
        if(value.getItemList.size() == 0) {
            throw new CustomerOrderException();
        }

        if(value.getBalance() < value.getCost()) {
            throw new InsufficientBalanceException();
        }

        return true;
    }
}

I made a class annotated with controller advice and exception handler but it doesn't seem to intercept the exception thrown from the validator.

If you just want to show some custom message to a client depending on the error - look how to implement it without using exceptions here: https://stackoverflow.com/questions/19825563/custom-validator-message-throwing-exception-in-implementation-of-constraintvali If you want to use exceptions try to catch `ValidationException` in your `ControllerAdvice` and get its `Throwable` cause, because Hibernate validator (which is use by spring-boot) wraps all exceptions in this default exception — Andrei Titov, Aug 23 '22 at 09:57

score 0 · Answer 1 · answered Aug 24 '22 at 01:08

Ok I got it, I extended my controller advice class with ResponseEntityExceptionHandler and did the usual ExceptionHandler annotation specifying my custom exceptions.

public class CustomExceptionHandler extends ResponseEntityExceptionHandler {
    @ExceptionHandler(value={CustomerOrderException.class})
    protected ResponseEntity<Object> handleException(CustomerOrderException ex, WebRequest request) {
        //return response entity
    }
}

Is it possible to intercept an exception thrown from a custom annotation validator in Spring Boot?

1 Answers1