Create a validation method which throw MethodArgumentNotValidException - spring

Question

I'm trying to validate this class :
public class RegisterRequest {
#Email(message = "format e-mail non valide") #NotNull(message = "ne doit pas être vide")
private String email;
#NotEmpty(message = "ne doit pas être vide")
#NotBlank(message = "ne doit pas être vide")
#NotNull(message = "ne doit pas être vide")
private String prenom;
#NotEmpty(message = "ne doit pas être vide")
#NotBlank(message = "ne doit pas être vide")
#NotNull(message = "ne doit pas être vide")
private String nom;
#Length(min = 13,max = 13 ,message = "doit contenir exactement 13 chiffres")
#NotNull(message = "ne doit pas être vide")
#Pattern(regexp = "^\\d*$", message = "ne doit contenir que des chiffres")
#Pattern(regexp = "^[12]\\w*$", message = "doit commencer par 1 ou 2")
private String cin;
#NotNull(message = "ne doit pas être vide")
#Pattern(regexp = "^(?!.* .*)[\\d+() ]{9,20}$", message = "ne doit contenir que des chiffres , des parentheses et plus")
#Length(min = 9,max = 20)
private String telephone;
#NotNull(message = "ne doit pas être vide")
#Length(min = 5,max = 20,message = "la taille de caractère doit être entre 5 et 20")
#Pattern(regexp = "^(?=[a-zA-Z\\d._-]*$)(?!.*[_.]{2})[^_.].*[^_.]$",message = "ne doit contenir de caractère special a part _ , .,-")
private String login;
}
after construction with ObjectMapper like this :
#PostMapping("/register")
public ResponseEntity<?> register(
#RequestParam("file") MultipartFile file,
#RequestParam Map<String,Object> req
) throws UserNotFoundException, EntreeException, RoleNotFoundException, IOException {
ObjectMapper mapper = new ObjectMapper();
RegisterRequest registerRequest = mapper.convertValue(req,RegisterRequest.class);
return controllerResponse(registerRequest,"");
}
as you see i can't use the #Valid annotation here (note : if there is a method to use the annotation directly i'll prefere it. but i didnt find any way to do it.
so i've found that it is better to create a validator class so after some research i've found this method
#Slf4j
public class CustomValidator {
ValidatorFactory factory = Validation.buildDefaultValidatorFactory();
Validator validator = factory.getValidator();
public Boolean validate(Object object){
Set<ConstraintViolation<Object>> violations = validator.validate(object);
log.info(violations.toString());
String errorMessage =
violations.stream().map(ConstraintViolation::getMessage).collect(Collectors.joining(", "));
throw new MethodArgumentNotValidException(errorMessage);
}
}
but it is not working take two argument in his constructor :
MethodParameter parameter, BindingResult bindingResult
so my question is how create this argument and how to throw it like #Valid throw it or is there any other way to handle the validation error

Answer 1

So, i've found this solution but i'm not throwing MethodArgumentNotValidException anymore
i've created my own exception class like this :
#Getter #Setter
public class ArgumentValidationExption extends Exception{
private final Map<String, String> errors;
public ArgumentValidationExption(Map<String,String> errors) {
super();
this.errors = errors;
}
#ExceptionHandler(ArgumentValidationExption.class)
public ResponseEntity<?> ArgumentInvalid(ArgumentValidationExption arg){
return jsonResponse(false,arg.getErrors(),400,arg.getClass().getSimpleName());
}
and in my validator class ill just throw my exception like this :
public void validate(Object object) throws ArgumentValidationExption {
Set<ConstraintViolation<Object>> violations = validator.validate(object);
if (violations.size() == 0 ) return ;
Map<String, String> errors = new HashMap<>();
for (ConstraintViolation<Object> constraint: violations
) {
errors.put(constraint.getPropertyPath().toString(), constraint.getMessageTemplate());
}
throw new ArgumentValidationExption(errors);
}
}
if you found a better solution please let me know