private def commaSeparatedGlob()

in finagle-benchmark/src/main/scala/com/twitter/finagle/stats/GlobBenchmark.scala [14:42]

• 26 lines of code
• 17 McCabe index (conditional complexity)

  private def commaSeparatedGlob(glob: String): Option[Pattern] =
    if (glob.isEmpty) None
    else {
      var i = 0
      // We expand the resulting string to fit up to 8 regex characters w/o
      // resizing the string builder.
      val result = new StringBuilder(glob.length + 8)
      while (i < glob.length) {
        (glob.charAt(i): @switch) match {
          case '[' => result.append("\\[")
          case ']' => result.append("\\]")
          case '|' => result.append("\\|")
          case '^' => result.append("\\^")
          case '$' => result.append("\\$")
          case '.' => result.append("\\.")
          case '?' => result.append("\\?")
          case '+' => result.append("\\+")
          case '(' => result.append("\\(")
          case ')' => result.append("\\)")
          case '{' => result.append("\\{")
          case '}' => result.append("\\}")
          case '*' => result.append(".*")
          case c => result.append(c)
        }
        i += 1
      }

      commaSeparatedRegex(result.toString).map(_.pattern)
    }