protected boolean validateAnswerParams(Ticket ticket) {
   boolean allowed = false;
   String email = ticket.getEmail();
   String message = this.getMessage();
   if (null == email || email.length() == 0) {
     this.addActionError(this.getText("Errors.ticketAnswer.mailNotFound"));
   } else if (message == null || message.length() == 0) {
     this.addFieldError(
         "message",
         this.getText("required", new String[] {"message"})); // TODO verificare parametro
   } else {
     allowed = true;
   }
   return allowed;
 }