public static TopInstanceCommand parse()

in odps-console-public/src/main/java/com/aliyun/openservices/odps/console/pub/TopInstanceCommand.java [291:365]
64 lines of code
15 McCabe index (conditional complexity)

  public static TopInstanceCommand parse(String commandString, ExecutionContext sessionContext)
      throws ODPSConsoleException {
    Matcher matcher = PATTERN.matcher(commandString);
    String projectName = null;
    Integer delay = null;
    Boolean onlyOwner = null;
    Integer number = null;
    Instance.Status status = null;

    if (matcher.matches()) {
      if (!StringUtils.isNullOrEmpty(matcher.group(3))) {
        CommandLine commandLine = getCommandLine(matcher.group(3));

        if (!commandLine.getArgList().isEmpty()) {
          throw new ODPSConsoleException(
              ODPSConsoleConstants.BAD_COMMAND + "[too much parameters.]");
        }

        if (commandLine.hasOption(PROJECT_TAG)) {
          projectName = commandLine.getOptionValue(PROJECT_TAG);
        }

        if (commandLine.hasOption(STATUS_TAG)) {
          try {
            status = Instance.Status.valueOf(commandLine.getOptionValue(STATUS_TAG).toUpperCase());
          } catch (IllegalArgumentException e) {
            throw new ODPSConsoleException(
                ODPSConsoleConstants.BAD_COMMAND + "[bad status value.]");
          }
        }

        if (commandLine.hasOption(LIMIT_TAG)) {
          String val = commandLine.getOptionValue(LIMIT_TAG);
          if (org.apache.commons.lang.StringUtils.isNumeric(val)) {
            number = Integer.parseInt(val);

            if (number <= 0) {
              throw new ODPSConsoleException(ODPSConsoleConstants.BAD_COMMAND
                                             + "[bad limit value, limit number should bigger than zero.]");
            }
          } else {
            throw new ODPSConsoleException(ODPSConsoleConstants.BAD_COMMAND + "[bad limit value.]");
          }
        }

        if (commandLine.hasOption(DELAY_TAG)) {
          String val = commandLine.getOptionValue(DELAY_TAG);
          if (StringUtils.isNullOrEmpty(val)) {
            delay = DEFAULT_DELAY;
          } else if (org.apache.commons.lang.StringUtils.isNumeric(val)
                     && Integer.parseInt(val) > 0) {
            delay = Integer.parseInt(val);
          } else {
            throw new ODPSConsoleException(ODPSConsoleConstants.BAD_COMMAND + "[bad delay value.]");
          }
        }

        if (commandLine.hasOption(ALL_TAG)) {
          onlyOwner = false;
        }
      }

      TopInstanceCommand
          command =
          new TopInstanceCommand(projectName, commandString, sessionContext);
      command.setOnlyOwner(onlyOwner);
      command.setStatus(status);
      command.setDelay(delay);
      command.setNubmer(number);

      return command;
    }

    return null;
  }