/**
   * Shows an error and a short description.
   *
   * @param ex the exception
   */
  static void showError(Throwable ex, String title, String message) {
    try {
      if (title == null) title = "Error in SIP contactlist storage";

      if (message == null)
        message = title + "\n" + ex.getClass().getName() + ": " + ex.getLocalizedMessage();

      if (SipActivator.getUIService() != null)
        SipActivator.getUIService()
            .getPopupDialog()
            .showMessagePopupDialog(message, title, PopupDialog.ERROR_MESSAGE);
    } catch (Throwable t) {
      logger.error("Error for error dialog", t);
    }
  }
  /** Handles new incoming object. */
  private void handle(JSONObject incomingObject) {
    if (!incomingObject.containsKey("class")) return;

    try {
      String classField = (String) incomingObject.get("class");

      if (classField.equals("loginko")) {
        showError(null, null, "Unauthorized. Cannot login: "******"errorstring"));

        logger.error("Error login: "******"errorstring"));

        destroy();

        return;
      } else if (classField.equals("login_id_ok")) {
        SipAccountIDImpl accountID = (SipAccountIDImpl) sipProvider.getAccountID();

        boolean useSipCredentials = accountID.isClistOptionUseSipCredentials();

        String password;
        if (useSipCredentials) {
          password = SipActivator.getProtocolProviderFactory().loadPassword(accountID);
        } else {
          password = accountID.getClistOptionPassword();
        }

        if (!authorize((String) incomingObject.get("sessionid"), password))
          logger.error("Error login authorization!");

        return;
      } else if (classField.equals("login_pass_ok")) {
        if (!sendCapas((JSONArray) incomingObject.get("capalist")))
          logger.error("Error send capas!");

        return;
      } else if (classField.equals("login_capas_ok")) {
        if (!sendFeatures(
            (String) incomingObject.get("astid"), (String) incomingObject.get("xivo_userid")))
          logger.error("Problem send features get!");

        return;
      } else if (classField.equals("features")) {
        if (!getPhoneList()) logger.error("Problem send get phones!");

        return;
      } else if (classField.equals("phones")) {
        phonesRecieved(incomingObject);
        return;
      } else if (classField.equals("disconn")) {
        destroy();
        return;
      } else {
        if (logger.isTraceEnabled()) logger.trace("unhandled classField: " + incomingObject);
        return;
      }
    } catch (Throwable t) {
      logger.error("Error handling incoming object", t);
    }
  }