private void writeEscaped0()

in johnzon-core/src/main/java/org/apache/johnzon/core/JsonGeneratorImpl.java [489:545]
50 lines of code
19 McCabe index (conditional complexity)

    private void writeEscaped0(final String value) {
        int len = 0;
        if (value == null || (len = value.length()) == 0) {
            return;
        }

        for (int i = 0; i < len; i++) {
            char c = value.charAt(i);

            while (c != ESCAPE_CHAR && c != QUOTE_CHAR && c >= SPACE) {

                //read fast
                justWrite(c);

                if (i >= len - 1) {
                    return;
                }

                i++;
                c = value.charAt(i);
            }

            switch (c) {
                case QUOTE_CHAR:
                case ESCAPE_CHAR:
                    justWrite(ESCAPE_CHAR);
                    justWrite(c);
                    break;
                default:
                    if (c < SPACE) {
                        switch (c) {
                            case EOL:
                                justWrite("\\n");
                                break;
                            case '\r':
                                justWrite("\\r");
                                break;
                            case '\t':
                                justWrite("\\t");
                                break;
                            case '\b':
                                justWrite("\\b");
                                break;
                            case '\f':
                                justWrite("\\f");
                                break;
                            default:
                                justWrite(toUnicode(c));
                        }
                    } else if ((c >= '\u0080' && c < '\u00a0') || (c >= '\u2000' && c < '\u2100')) {
                        justWrite(toUnicode(c));
                    } else {
                        justWrite(c);
                    }
            }
        }
    }