private[this] def filterRegistry()

in server/src/main/scala/com/twitter/server/handler/RegistryHandler.scala [49:78]

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

  private[this] def filterRegistry(filter: Option[String]): Registry = {
    val registry = GlobalRegistry.get
    filter match {
      case None => registry
      case Some(f) =>
        val tokens = f.split("/").toList.dropWhile(_ == Formatter.RegistryKey)
        if (tokens.isEmpty) {
          registry
        } else {
          val matchers: Seq[Matcher] =
            tokens.map { t =>
              if (t == "*") WildcardMatcher
              else new LiteralMatcher(t)
            }

          val filtered = new SimpleRegistry()
          registry.foreach { entry =>
            if (matchers.length <= entry.key.length) {
              val allMatch = matchers.zip(entry.key).forall {
                case (matcher, word) =>
                  matcher.matches(word)
              }
              if (allMatch)
                filtered.put(entry.key, entry.value)
            }
          }
          filtered
        }
    }
  }