private char readEscapeCharacter()

in tapestry-json/src/main/java/org/apache/tapestry5/json/JSONTokener.java [267:320]

• 48 lines of code
• 15 McCabe index (conditional complexity)

    private char readEscapeCharacter() {
        char escaped = in.charAt(pos++);
        switch (escaped) {
            case 'u': {
                if (pos + 4 > in.length()) {
                    throw syntaxError("Unterminated escape sequence");
                }
                String hex = in.substring(pos, pos + 4);
                try {
                    return (char) Integer.parseInt(hex, 16);
                } catch (NumberFormatException nfe) {
                    throw syntaxError("Invalid escape sequence: " + hex);
                }
                finally {
                    pos += 4;
                }
            }
            case 'x': {
              if (pos + 2 > in.length()) {
                  throw syntaxError("Unterminated escape sequence");
              }
              String hex = in.substring(pos, pos + 2);
              try {
                  return (char) Integer.parseInt(hex, 16);
              } catch (NumberFormatException nfe) {
                  throw syntaxError("Invalid escape sequence: " + hex);
              }
              finally {
                  pos += 2;
              }

            }
            case 't':
                return '\t';

            case 'b':
                return '\b';

            case 'n':
                return '\n';

            case 'r':
                return '\r';

            case 'f':
                return '\f';

            case '\'':
            case '"':
            case '\\':
            default:
                return escaped;
        }
    }