private static String sanitizeSegments()

in spectator-ext-ipc/src/main/java/com/netflix/spectator/ipc/http/HostSanitizer.java [126:153]

• 25 lines of code
• 8 McCabe index (conditional complexity)

  private static String sanitizeSegments(String host, Set<String> allowed) {
    HostStringBuilder builder = new HostStringBuilder();

    int last = host.length();
    int pos = host.lastIndexOf('.');
    while (pos >= 0) {
      String segment = host.substring(pos + 1, last);
      last = pos;
      pos = host.lastIndexOf('.', last - 1);

      if (!segment.isEmpty()) {
        if (shouldSuppressSegment(segment, allowed))
          segment = "_";
        if (!builder.prepend(segment))
          break;
      }
    }
    if (pos == -1) {
      String segment = host.substring(0, last);
      if (!segment.isEmpty()) {
        if (shouldSuppressSegment(segment, allowed))
          segment = "_";
        builder.prepend(segment);
      }
    }

    return builder.toString();
  }