public static String escape()

in spectator-api/src/main/java/com/netflix/spectator/impl/matcher/PatternUtils.java [165:197]

• 33 lines of code
• 20 McCabe index (conditional complexity)

  public static String escape(String str) {
    StringBuilder builder = new StringBuilder();
    for (int i = 0; i < str.length(); ++i) {
      char c = str.charAt(i);
      switch (c) {
        case '\t': builder.append("\\t"); break;
        case '\n': builder.append("\\n"); break;
        case '\r': builder.append("\\r"); break;
        case '\f': builder.append("\\f"); break;
        case '\\': builder.append("\\\\"); break;
        case '^':  builder.append("\\^"); break;
        case '$':  builder.append("\\$"); break;
        case '.':  builder.append("\\."); break;
        case '?':  builder.append("\\?"); break;
        case '*':  builder.append("\\*"); break;
        case '+':  builder.append("\\+"); break;
        case '[':  builder.append("\\["); break;
        case ']':  builder.append("\\]"); break;
        case '(':  builder.append("\\("); break;
        case ')':  builder.append("\\)"); break;
        case '{':  builder.append("\\{"); break;
        case '}':  builder.append("\\}"); break;
        default:
          if (c <= ' ' || c > '~') {
            builder.append(String.format("\\u%04x", (int) c));
          } else {
            builder.append(c);
          }
          break;
      }
    }
    return builder.toString();
  }