/**
  * Validael campo del número de cuenta
  *
  * @return true si no tiene errores
  */
 public boolean validateAccountNumber() {
   List<String> validationErrors =
       validateField(
           "cuenta", false, view.getAccountNumber(), view.getAccountNumberValidationRules());
   view.setAccountNumberErrors(validationErrors);
   return validationErrors.size() == 0;
 }
 /**
  * Invoca a las clases necesarias para registrar una cuenta via web services
  *
  * @param client
  */
 private void callRegisterWebService(final Client client) {
   view.getWSTokenRequester()
       .getTokenAsync(
           new WSTokenReceivedCallback() {
             @Override
             public void onWSTokenReceived(WSResponse<WSToken> wsTokenResult) {
               view.showRegistrationErrors(wsTokenResult.getErrors());
               if (wsTokenResult.getResult() != null) {
                 AccountWS accountWebService = new AccountWS(wsTokenResult.getResult());
                 accountWebService.registerAccount(
                     view.getAccountNumber(),
                     view.getNUS(),
                     client.getGmail(),
                     view.getPhoneNumber(),
                     Build.BRAND,
                     Build.MODEL,
                     view.getIMEI(),
                     view.getPreferences().getGCMToken(),
                     new IWSFinishEvent<Account>() {
                       @Override
                       public void executeOnFinished(WSResponse<Account> result) {
                         view.hideWSWaiting();
                         if (result.getResult() != null) {
                           ElfecAccountsManager.registerAccount(result.getResult());
                           view.notifyAccountSuccessfulyRegistered();
                         } else if (!result.hasErrors())
                           result.addError(new MobileSideException());
                         view.showRegistrationErrors(result.getErrors());
                       }
                     });
               } else view.hideWSWaiting();
             }
           });
 }
 /**
  * Valida el campo del NUS
  *
  * @return true si no tiene errores
  */
 public boolean validateNUS() {
   List<String> validationErrors =
       validateField("NUS", true, view.getNUS(), view.getNUSValidationRules());
   view.setNUSErrors(validationErrors);
   return validationErrors.size() == 0;
 }