code: @Override
    public boolean isValidName(String src) {
      StringTokenizer tokens = new StringTokenizer(src, Path.SEPARATOR);
      while (tokens.hasMoreTokens()) {
        String element = tokens.nextToken();
        if (element.equals("..") || element.equals(".")) {
          return false;
        }
      }
      return true;
    }
docs: Follow HDFS conventions except allow for ':' in paths.