private static void printCodePoint()

in src/com/amazon/ion/util/IonTextUtils.java [256:352]
95 lines of code
29 McCabe index (conditional complexity)

    private static void printCodePoint(Appendable out, int c, EscapeMode mode)
        throws IOException
    {
        // JSON only allows uHHHH numeric escapes.
        switch (c) {
            case 0:
                out.append(mode == EscapeMode.JSON ? "\\u0000" : "\\0");
                return;
            case '\t':
                out.append("\\t");
                return;
            case '\n':
                if (mode == EscapeMode.ION_LONG_STRING) {
                    out.append('\n');
                }
                else {
                    out.append("\\n");
                }
                return;
            case '\r':
                out.append("\\r");
                return;
            case '\f':
                out.append("\\f");
                return;
            case '\u0008':
                out.append("\\b");
                return;
            case '\u0007':
                out.append(mode == EscapeMode.JSON ? "\\u0007" : "\\a");
                return;
            case '\u000B':
                out.append(mode == EscapeMode.JSON ? "\\u000b" : "\\v");
                return;
            case '\"':
                if (mode == EscapeMode.JSON || mode == EscapeMode.ION_STRING) {
                    out.append("\\\"");
                    return;
                }
                break; // Treat as normal code point for long string or symbol.
            case '\'':
                if (mode == EscapeMode.ION_SYMBOL ||
                    mode == EscapeMode.ION_LONG_STRING)
                {
                    out.append("\\\'");
                    return;
                }
                break;
            case '\\':
                out.append("\\\\");
                return;
            default:
                break;
        }

        if (c < 32) {
            if (mode == EscapeMode.JSON) {
                printCodePointAsFourHexDigits(out, c);
            }
            else {
                printCodePointAsTwoHexDigits(out, c);
            }
        }
        else if (c < 0x7F) {  // Printable ASCII
            out.append((char)c);
        }
        else if (c <= 0xFF) {
            if (mode == EscapeMode.JSON) {
                printCodePointAsFourHexDigits(out, c);
            }
            else {
                printCodePointAsTwoHexDigits(out, c);
            }
        }
        else if (c <= 0xFFFF) {
            printCodePointAsFourHexDigits(out, c);
        }
        else {
            if (mode == EscapeMode.JSON) {
                // JSON does not have a \Uxxxxyyyy escape, surrogates
                // must be used as per RFC-4627
                //
                // http://www.ietf.org/rfc/rfc4627.txt
                // [...]
                //   To escape an extended character that is not in the Basic Multilingual
                //   Plane, the character is represented as a twelve-character sequence,
                //   encoding the UTF-16 surrogate pair.  So, for example, a string
                //   containing only the G clef character (U+1D11E) may be represented as
                //   "\uD834\uDD1E".
                // [...]
                printCodePointAsSurrogatePairHexDigits(out, c);
            }
            else {
                printCodePointAsEightHexDigits(out, c);
            }
        }
    }