public static String getReturnUrlTypeMapper(String actionName) throws NException {
    String commandNo = null;
    NFileManager fileManager = NFileManager.getInstance();
    commandNo =
        fileManager.get(
            actionSpecOnly(actionName),
            "/navigation-mapper/action-name<" + actionNameOnly(actionName) + ">/return-type");

    return commandNo;
  }
  /**
   * actionName과 Mapping되는 Command를 반환해 준다.
   *
   * @param action String ActionName
   * @return String Command Name
   * @throws NException Configuration에서 데이터를 가져올 때 발생.
   */
  public static String getCommandMapper(String actionName) throws NException {
    String commandName = null;
    NFileManager fileManager = NFileManager.getInstance();
    commandName =
        fileManager.get(
            actionSpecOnly(actionName),
            "/navigation-mapper/action-name<" + actionNameOnly(actionName) + ">/command");

    if (commandName == null)
      throw new NException("NSF_NAV_001", "The action-name(" + actionName + ") is not found.");

    return commandName;
  }
  /**
   * actionName과 Mapping되는 Return URL을 반환해 준다.
   *
   * @param action String ActionName
   * @return String Return URL
   * @throws NException Configuration에서 데이터를 가져올 때 발생.
   */
  public static String getReturnUrlMapper(String actionName) throws NException {
    String returnUrl = null;
    NFileManager fileManager = NFileManager.getInstance();
    returnUrl =
        fileManager.get(
            actionSpecOnly(actionName),
            "/navigation-mapper/action-name<" + actionNameOnly(actionName) + ">/return-url");

    if (returnUrl == null && !isNullReturnUrlType(actionName))
      throw new NException(
          "NSF_NAV_003", "The return-url of the action-name(" + actionName + ") is not found.");

    return returnUrl;
  }
  /**
   * actionName과 Mapping되는 Error시 Message를 보여줄 Page를 를 반환해 준다.
   *
   * @param action String ActionName
   * @return String Error Page
   * @throws NException Configuration에서 데이터를 가져올 때 발생.
   */
  public static String getErrorMapper(String actionName) throws NException {
    String messageName = null;

    NFileManager fileManager = NFileManager.getInstance();
    messageName =
        fileManager.get(
            actionSpecOnly(actionName),
            "/navigation-mapper/action-name<" + actionNameOnly(actionName) + ">/error");

    if (messageName == null || messageName.equals(""))
      messageName =
          fileManager.get(actionSpecOnly(actionName), "/navigation-mapper/global-setting/error");

    if (messageName == null)
      throw new NException(
          "NSF_NAV_004", "The error page of the action-name(" + actionName + ") is not found.");

    return messageName;
  }