public ISOLikeTemplateDateFormat()

in freemarker-core/src/main/java/freemarker/core/ISOLikeTemplateDateFormat.java [51:169]
114 lines of code
29 McCabe index (conditional complexity)

    public ISOLikeTemplateDateFormat(
            final String formatString, int parsingStart,
            int dateType, boolean zonelessInput,
            TimeZone timeZone,
            ISOLikeTemplateDateFormatFactory factory, Environment env)
            throws InvalidFormatParametersException, UnknownDateTypeFormattingUnsupportedException {
        this.factory = factory;
        this.env = env;
        if (dateType == TemplateDateModel.UNKNOWN) {
            throw new UnknownDateTypeFormattingUnsupportedException();
        }
        
        this.dateType = dateType;
        this.zonelessInput = zonelessInput;
        
        final int ln = formatString.length();
        boolean afterSeparator = false;
        int i = parsingStart;
        int accuracy = DateUtil.ACCURACY_MILLISECONDS;
        Boolean showZoneOffset = null;
        Boolean forceUTC = Boolean.FALSE;
        while (i < ln) {
            final char c = formatString.charAt(i++);
            if (c == '_' || c == ' ') {
                afterSeparator = true;
            } else {
                if (!afterSeparator) {
                    throw new InvalidFormatParametersException(
                            "Missing space or \"_\" before \"" + c + "\" (at char pos. " + i + ").");
                }
                
                switch (c) {
                case 'h':
                case 'm':
                case 's':
                    if (accuracy != DateUtil.ACCURACY_MILLISECONDS) {
                        throw new InvalidFormatParametersException(
                                "Character \"" + c + "\" is unexpected as accuracy was already specified earlier "
                                + "(at char pos. " + i + ").");
                    }
                    switch (c) {
                    case 'h':
                        if (isXSMode()) {
                            throw new InvalidFormatParametersException(
                                    XS_LESS_THAN_SECONDS_ACCURACY_ERROR_MESSAGE);
                        }
                        accuracy = DateUtil.ACCURACY_HOURS;
                        break;
                    case 'm':
                        if (i < ln && formatString.charAt(i) == 's') {
                            i++;
                            accuracy = DateUtil.ACCURACY_MILLISECONDS_FORCED;
                        } else {
                            if (isXSMode()) {
                                throw new InvalidFormatParametersException(
                                        XS_LESS_THAN_SECONDS_ACCURACY_ERROR_MESSAGE);
                            }
                            accuracy = DateUtil.ACCURACY_MINUTES;
                        }
                        break;
                    case 's':
                        accuracy = DateUtil.ACCURACY_SECONDS;
                        break;
                    }
                    break;
                case 'f':
                    if (i < ln && formatString.charAt(i) == 'u') {
                        checkForceUTCNotSet(forceUTC);
                        i++;
                        forceUTC = Boolean.TRUE;
                        break;
                    }
                    // Falls through
                case 'n':
                    if (showZoneOffset != null) {
                        throw new InvalidFormatParametersException(
                                "Character \"" + c + "\" is unexpected as zone offset visibility was already "
                                + "specified earlier. (at char pos. " + i + ").");
                    }
                    switch (c) {
                    case 'n':
                        if (i < ln && formatString.charAt(i) == 'z') {
                            i++;
                            showZoneOffset = Boolean.FALSE;
                        } else {
                            throw new InvalidFormatParametersException(
                                    "\"n\" must be followed by \"z\" (at char pos. " + i + ").");
                        }
                        break;
                    case 'f':
                        if (i < ln && formatString.charAt(i) == 'z') {
                            i++;
                            showZoneOffset = Boolean.TRUE;
                        } else {
                            throw new InvalidFormatParametersException(
                                    "\"f\" must be followed by \"z\" (at char pos. " + i + ").");
                        }
                        break;
                    }
                    break;
                case 'u':
                    checkForceUTCNotSet(forceUTC);
                    forceUTC = null;  // means UTC will be used except for zonelessInput
                    break;
                default:
                    throw new InvalidFormatParametersException(
                            "Unexpected character, " + StringUtil.jQuote(String.valueOf(c))
                            + ". Expected the beginning of one of: h, m, s, ms, nz, fz, u"
                            + " (at char pos. " + i + ").");
                } // switch
                afterSeparator = false;
            } // else
        } // while
        
        this.accuracy = accuracy;
        this.showZoneOffset = showZoneOffset;
        this.forceUTC = forceUTC;
        this.timeZone = timeZone;
    }