Examples with SYSTEMTIME com.zimbra.cs.util.tnef.mapi.SYSTEMTIME used on opensource projects

Example 1 with SYSTEMTIME

use of com.zimbra.cs.util.tnef.mapi.SYSTEMTIME in project zm-mailbox by Zimbra.

the class TnefTimeZone method getTimeZone.

/**
     * Ref: [MS-OXOCAL] - v20100729
     * Returns a time zone from the given index;
     * The default TimeZone ID is "tnefTimeZone"
     * @param index
     * @return
     * @throws IOException 
     */
public static TimeZone getTimeZone(int index, boolean observeDaylightSaving, String tzId) throws IOException {
    if (index < 0 || index > 59)
        return null;
    // UTC offset in minutes
    int bias = 0;
    // offset in minutes from bias during standard time.; has a value of 0 in most cases
    int standardBias = 0;
    // offset in minutes from bias during daylight saving time.
    int daylightBias = 0;
    SYSTEMTIME StandardDate = null;
    SYSTEMTIME DaylightDate = null;
    // 1 - January, 12 - December
    int startMonth = 0;
    // 0 - Sunday, 6 - Saturday
    int startDayOfWeek = 0;
    // day of the week within the month, 5 = last occurrence of that day
    int startDay = 0;
    int startHour = 0;
    int endMonth = 0;
    int endDayOfWeek = 0;
    int endDay = 0;
    int endHour = 0;
    // get the UTC+12 standard offset in minutes from MS_OXOCAL_STANDARD_OFFSET table!!
    int utcPlus12offset = MS_OXOCAL_STANDARD_OFFSET[index][0];
    int indexToDaytimeSavingDatesTable = MS_OXOCAL_STANDARD_OFFSET[index][1];
    if (utcPlus12offset > 12 * 60)
        bias = (utcPlus12offset - 12 * 60) * -1;
    else if (utcPlus12offset < 12 * 60)
        bias = (12 * 60 - utcPlus12offset);
    if (indexToDaytimeSavingDatesTable == -1 || !observeDaylightSaving) {
        int utcOffsetInMilliseconds = bias * 60 * 1000;
        return getNoDaylightSavingTimeZoneFromUtcOffset(utcOffsetInMilliseconds);
    }
    // handle the daylight saving case here...
    // HACK!!
    // HACK!!
    // TZRule.getStandardUtcOffset() always multiply the offset by -1;
    // Hence, we are multiplying by -1 in reverse order.
    bias = bias * -1;
    // If daylight saving time is observed, during the daylight time period, 
    // an additional -60 offset is added to the standard offset.
    daylightBias = -60;
    startMonth = MS_OXOCAL_STAN_DST_DATES[indexToDaytimeSavingDatesTable][1][0];
    startDayOfWeek = MS_OXOCAL_STAN_DST_DATES[indexToDaytimeSavingDatesTable][1][1];
    startDay = MS_OXOCAL_STAN_DST_DATES[indexToDaytimeSavingDatesTable][1][2];
    startHour = MS_OXOCAL_STAN_DST_DATES[indexToDaytimeSavingDatesTable][1][3];
    endMonth = MS_OXOCAL_STAN_DST_DATES[indexToDaytimeSavingDatesTable][0][0];
    endDayOfWeek = MS_OXOCAL_STAN_DST_DATES[indexToDaytimeSavingDatesTable][0][1];
    endDay = MS_OXOCAL_STAN_DST_DATES[indexToDaytimeSavingDatesTable][0][2];
    endHour = MS_OXOCAL_STAN_DST_DATES[indexToDaytimeSavingDatesTable][0][3];
    StandardDate = new SYSTEMTIME(endMonth, endDayOfWeek, endDay, endHour);
    DaylightDate = new SYSTEMTIME(startMonth, startDayOfWeek, startDay, startHour);
    if (sLog.isDebugEnabled()) {
        StringBuilder debugInfo = new StringBuilder();
        debugInfo.append(bias * -1 + " " + "{" + endMonth + "," + endDayOfWeek + "," + endDay + "," + endHour + "} " + "{" + startMonth + "," + startDayOfWeek + "," + startDay + "," + startHour + "}");
        sLog.debug(debugInfo);
    }
    String timeZoneId;
    if (tzId == null || tzId.length() == 0)
        timeZoneId = DEFAULT_TNEF_TIMEZONE_ID;
    else
        timeZoneId = tzId;
    TimeZoneDefinition timeZoneDefinition = new TimeZoneDefinition(timeZoneId, bias, standardBias, daylightBias, StandardDate, DaylightDate);
    return timeZoneDefinition.getTimeZone();
}