/**
* @param object $value
* @param Constraint $constraint
*
* @throws UnexpectedTypeException
* @throws ConstraintDefinitionException
*/
public function validate($value, Constraint $constraint)
{
if (null === $value || '' === $value) {
return;
}
if (!is_scalar($value) && !(is_object($value) && method_exists($value, '__toString'))) {
throw new UnexpectedTypeException($value, 'string');
}
$value = (string) $value;
if (empty($value)) {
return;
}
$value = (string) $value;
$user = $this->userRepository->findOneByUsername(new Username($value));
if (null !== $user) {
$this->context->buildViolation($constraint->message)->addViolation();
}
}
