Method valueOf

src/main/java/com/amazon/ion/Timestamp.java:962–1140

Returns a new Timestamp that represents the point in time, precision and local offset defined in Ion format by the CharSequence. @param ionFormattedTimestamp a sequence of characters that is the Ion representation of a Timestamp @throws IllegalArgumentException i

(CharSequence ionFormattedTimestamp)

     * @see <a href="http://www.w3.org/TR/NOTE-datetime">W3C Note on Date and Time Formats</a>
     */
    public static Timestamp valueOf(CharSequence ionFormattedTimestamp)
    {
        final CharSequence in = ionFormattedTimestamp;
        int pos;

        final int length = in.length();
        if (length == 0)
        {
            throw fail(in);
        }

        // check for 'null.timestamp'
        if (in.charAt(0) == 'n') {
            if (length >= LEN_OF_NULL_IMAGE
                && NULL_TIMESTAMP_IMAGE.contentEquals(in.subSequence(0, LEN_OF_NULL_IMAGE)))
            {
                if (length > LEN_OF_NULL_IMAGE) {
                    if (!isValidFollowChar(in.charAt(LEN_OF_NULL_IMAGE))) {
                        throw fail(in);
                    }
                }
                return null;
            }
            throw fail(in);
        }

        int year  = 1;
        int month = 1;
        int day   = 1;
        int hour  = 0;
        int minute = 0;
        int seconds = 0;
        BigDecimal fraction = null;
        Precision precision;

        // fake label to turn goto's into a break so Java is happy :) enjoy
        do {
            // otherwise we expect yyyy-mm-ddThh:mm:ss.ssss+hh:mm
            if (length < END_OF_YEAR + 1) {  // +1 for the "T"
                throw fail(in, "year is too short (must be at least yyyyT)");
            }
            pos = END_OF_YEAR;
            precision = Precision.YEAR;
            year  = read_digits(in, 0, 4, -1, "year");

            char c = in.charAt(END_OF_YEAR);
            if (c == 'T') break;
            if (c != '-') {
                throw fail(in,
                           "expected \"-\" between year and month, found "
                               + printCodePointAsString(c));
            }
            if (length < END_OF_MONTH + 1) {  // +1 for the "T"
                throw fail(in, "month is too short (must be yyyy-mmT)");
            }
            pos = END_OF_MONTH;
            precision = Precision.MONTH;
            month = read_digits(in, END_OF_YEAR + 1, 2, -1,  "month");