public int run()

in src/java/org/apache/nutch/segment/SegmentReader.java [659:762]
98 lines of code
28 McCabe index (conditional complexity)

  public int run(String[] args) throws Exception {
    if (args.length < 2) {
      usage();
      return -1;
    }
    int mode = -1;
    if (args[0].equals("-dump"))
      mode = MODE_DUMP;
    else if (args[0].equals("-list"))
      mode = MODE_LIST;
    else if (args[0].equals("-get"))
      mode = MODE_GET;

    // collect general options
    for (int i = 1; i < args.length; i++) {
      if (args[i].equals("-nocontent")) {
        co = false;
        args[i] = null;
      } else if (args[i].equals("-nofetch")) {
        fe = false;
        args[i] = null;
      } else if (args[i].equals("-nogenerate")) {
        ge = false;
        args[i] = null;
      } else if (args[i].equals("-noparse")) {
        pa = false;
        args[i] = null;
      } else if (args[i].equals("-noparsedata")) {
        pd = false;
        args[i] = null;
      } else if (args[i].equals("-noparsetext")) {
        pt = false;
        args[i] = null;
      } else if (args[i].equals("-recode")) {
        recodeContent = true;
        args[i] = null;
      }
    }

    if (recodeContent) {
      LOG.info("Recoding charset of HTML content");
      getConf().setBoolean("segment.reader.content.recode", true);
    }

    // collect required args
    switch (mode) {
    case MODE_DUMP:

      String input = args[1];
      if (input == null) {
        System.err.println("Missing required argument: <segment_dir>");
        usage();
        return -1;
      }
      String output = args.length > 2 ? args[2] : null;
      if (output == null) {
        System.err.println("Missing required argument: <output>");
        usage();
        return -1;
      }
      dump(new Path(input), new Path(output));
      return 0;
    case MODE_LIST:
      ArrayList<Path> dirs = new ArrayList<>();
      for (int i = 1; i < args.length; i++) {
        if (args[i] == null)
          continue;
        if (args[i].equals("-dir")) {
          Path dir = new Path(args[++i]);
          FileSystem fs = dir.getFileSystem(getConf());
          FileStatus[] fstats = fs.listStatus(dir,
              HadoopFSUtil.getPassDirectoriesFilter(fs));
          Path[] files = HadoopFSUtil.getPaths(fstats);
          if (files != null && files.length > 0) {
            dirs.addAll(Arrays.asList(files));
          }
        } else
          dirs.add(new Path(args[i]));
      }
      list(dirs, new OutputStreamWriter(System.out, StandardCharsets.UTF_8));
      return 0;
    case MODE_GET:
      input = args[1];
      if (input == null) {
        System.err.println("Missing required argument: <segment_dir>");
        usage();
        return -1;
      }
      String key = args.length > 2 ? args[2] : null;
      if (key == null) {
        System.err.println("Missing required argument: <keyValue>");
        usage();
        return -1;
      }
      get(new Path(input), new Text(key),
          new OutputStreamWriter(System.out, StandardCharsets.UTF_8),
          new HashMap<>());
      return 0;
    default:
      System.err.println("Invalid operation: " + args[0]);
      usage();
      return -1;
    }
  }