public static Options parseArgs(String cmdArgs[]) {
      CommandLineParser parser = new GnuParser();
      CmdLineOptions options = getCmdLineOptions();
      try {
        CommandLine cmd = parser.parse(options, cmdArgs, false);

        if (cmd.hasOption(HELP_OPTION)) {
          printUsage(options);
          System.exit(0);
        }

        String[] args = cmd.getArgs();
        if (args.length >= 4 || args.length < 2) {
          String msg = args.length < 2 ? "Missing arguments" : "Too many arguments";
          errorMsg(msg, options);
          System.exit(1);
        }

        String keyspace = args[0];
        String cf = args[1];
        String snapshot = null;
        if (args.length == 3) snapshot = args[2];

        Options opts = new Options(keyspace, cf, snapshot);

        opts.debug = cmd.hasOption(DEBUG_OPTION);
        opts.keepSource = cmd.hasOption(KEEP_SOURCE);

        return opts;
      } catch (ParseException e) {
        errorMsg(e.getMessage(), options);
        return null;
      }
    }