JAX-RS Form Validation -Highlight input text field and display validation message

Question

I have a sample CRUD application, The application used is a Wine Cellar app. You can search for wines, add a wine to your cellar, update and delete wines. I got it from RESTful services with jQuery and Java using JAX-RS and Jersey.

I modified the Wine class to include validation constraints.

@NotNull(message='Name must have a value')
private String name;
@NotNull(message='Grapes must have a value')
private String grapes;

If the user creates/updates, a wine the errors will be thrown if the name and grape fields are empty. All my validation messages are returned to the browser in json format.

public Wine create(Wine wine) {...}
public Wine update(Wine wine) {...}

If only one error is thrown, I want to display the correct message to the user and also highlight the field.

How do I get the empty field(name or id) that triggered the error as well as the correct validation message?

Can you give some more details on how do you invoke validation? Are you doing it yourself or is there some integration with Bean Validation provided by Jersey? — Gunnar, Apr 08 '13 at 11:30
I'm using Bean Validation. I did some more searching and found this question http://stackoverflow.com/questions/5226797/making-javax-validation-error-message-more-specific , it seems similar to what I want to accomplish. I'll review it and update my question, if needed. — heyomi, Apr 08 '13 at 16:32
I'm still not sure how Bean Validation is invoked in your case. Are you invoking `javax.validation.Validator` yourself? — Gunnar, Apr 08 '13 at 22:45

score 0 · Accepted Answer · answered Nov 10 '13 at 20:37

Sorry about inconsistencies or for lack of clarity.

I used an Web Application Exception Mapper to handle the exceptions. It checks if the error was generated from a web application exception or constraint violation exception.

if (exception instanceof ConstraintViolationException) {
   Set<ErrorResponse> errorResponses = new HashSet<>();
   for (ConstraintViolation violation : ((ConstraintViolationException) exception).getConstraintViolations()) {
   errorResponses.add(new ErrorResponse(violation.getPropertyPath().toString(),violation.getMessage()));
   }
   builder.entity(new WebApplicationError(errorResponses));
}

Also, I checked if was a JsonMapping Exception

if (exception instanceof JsonMappingException) {
           ResourceBundle bundle = ResourceBundle.getBundle("ValidationMessages");
           Set<ErrorResponse> errorResponses = new HashSet<>();

       for(Reference ref : ((JsonMappingException) exception).getPath()) {
          String className = ref.getFrom().getClass().getName()
                                        .substring(ref.getFrom().getClass().getName()
                                        .lastIndexOf(".") + 1).toLowerCase();                        
          String key = "the.key";
          try {
               message = bundle.getString(key);
          } catch (MissingResourceException e) {
               logger.error(e.getMessage());
          }
               errorResponses.add(new ErrorResponse(ref.getFieldName(), message));
        }
            builder.entity(new WebApplicationError(errorResponses));
    }

JsonMapping Exception

Constraint Violation

JAX-RS Form Validation -Highlight input text field and display validation message

1 Answers1