iothub/device/iot-device-client/src/main/java/com/microsoft/azure/sdk/iot/device/twin/ParserUtility.java [177:220]:
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    public static Date getDateTimeUtc(String dataTime) throws IllegalArgumentException
    {
        Date dateTimeUtc;
        SimpleDateFormat dateFormat = new SimpleDateFormat(DATEFORMAT);
        dateFormat.setTimeZone(TimeZone.getTimeZone(TIMEZONE_UTC));

        /* Codes_SRS_PARSER_UTILITY_21_022: [If the provide string is null, empty or contains an invalid data format, the getDateTimeUtc shall throw IllegalArgumentException.] */
        if ((dataTime == null) || dataTime.isEmpty())
        {
            throw new IllegalArgumentException("date is null, empty, or invalid");
        }

        try
        {
            String[] splitDateTime = dataTime.split(MILLISECONDS_REGEX);
            int milliseconds;
            if (splitDateTime.length > EXPECTED_PARTS_IN_DATE)
            {
                throw new IllegalArgumentException("invalid time:" + dataTime);
            }
            else if ((splitDateTime.length == EXPECTED_PARTS_IN_DATE) && !splitDateTime[MILLISECONDS_IN_DATE].isEmpty())
            {
                int millisecondsLength = splitDateTime[MILLISECONDS_IN_DATE].length();
                if (millisecondsLength > MAX_MILLISECONDS_LENGTH_IN_DATE)
                {
                    millisecondsLength = MAX_MILLISECONDS_LENGTH_IN_DATE;
                }

                milliseconds = Integer.parseInt(splitDateTime[MILLISECONDS_IN_DATE].substring(0, millisecondsLength)) *
                    (int)Math.pow(MILLISECONDS_NUMERIC_BASE, (MAX_MILLISECONDS_LENGTH_IN_DATE - millisecondsLength));
            }
            else
            {
                milliseconds = NO_MILLISECONDS_IN_DATE;
            }
            dateTimeUtc =  new Date(dateFormat.parse(splitDateTime[DATE_AND_TIME_IN_DATE]).getTime() + milliseconds);
        }
        catch (ParseException e)
        {
            throw new IllegalArgumentException("invalid time:" + dataTime);
        }

        return dateTimeUtc;
    }
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provisioning/provisioning-service-client/src/main/java/com/microsoft/azure/sdk/iot/provisioning/service/configs/ParserUtility.java [177:220]:
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    public static Date getDateTimeUtc(String dataTime) throws IllegalArgumentException
    {
        Date dateTimeUtc;
        SimpleDateFormat dateFormat = new SimpleDateFormat(DATEFORMAT);
        dateFormat.setTimeZone(TimeZone.getTimeZone(TIMEZONE_UTC));

        /* Codes_SRS_PARSER_UTILITY_21_022: [If the provide string is null, empty or contains an invalid data format, the getDateTimeUtc shall throw IllegalArgumentException.] */
        if ((dataTime == null) || dataTime.isEmpty())
        {
            throw new IllegalArgumentException("date is null, empty, or invalid");
        }

        try
        {
            String[] splitDateTime = dataTime.split(MILLISECONDS_REGEX);
            int milliseconds;
            if (splitDateTime.length > EXPECTED_PARTS_IN_DATE)
            {
                throw new IllegalArgumentException("invalid time:" + dataTime);
            }
            else if ((splitDateTime.length == EXPECTED_PARTS_IN_DATE) && !splitDateTime[MILLISECONDS_IN_DATE].isEmpty())
            {
                int millisecondsLength = splitDateTime[MILLISECONDS_IN_DATE].length();
                if (millisecondsLength > MAX_MILLISECONDS_LENGTH_IN_DATE)
                {
                    millisecondsLength = MAX_MILLISECONDS_LENGTH_IN_DATE;
                }

                milliseconds = Integer.parseInt(splitDateTime[MILLISECONDS_IN_DATE].substring(0, millisecondsLength)) *
                    (int)Math.pow(MILLISECONDS_NUMERIC_BASE, (MAX_MILLISECONDS_LENGTH_IN_DATE - millisecondsLength));
            }
            else
            {
                milliseconds = NO_MILLISECONDS_IN_DATE;
            }
            dateTimeUtc =  new Date(dateFormat.parse(splitDateTime[DATE_AND_TIME_IN_DATE]).getTime() + milliseconds);
        }
        catch (ParseException e)
        {
            throw new IllegalArgumentException("invalid time:" + dataTime);
        }

        return dateTimeUtc;
    }
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