/// <summary>Creates an <code>XMPDateTime</code>-instance from a calendar.</summary>
/// <param name="calendar">a <code>Calendar</code></param>
public XMPDateTimeImpl(Sharpen.Calendar calendar)
{
// EMPTY
// extract the date and timezone from the calendar provided
DateTime date = calendar.GetTime();
TimeZoneInfo zone = calendar.GetTimeZone();
// put that date into a calendar the pretty much represents ISO8601
// I use US because it is close to the "locale" for the ISO8601 spec
Sharpen.GregorianCalendar intCalendar = (Sharpen.GregorianCalendar)Sharpen.Calendar.GetInstance(CultureInfo.InvariantCulture);
intCalendar.SetGregorianChange(Sharpen.Extensions.CreateDate(long.MinValue));
intCalendar.SetTimeZone(zone);
intCalendar.SetTime(date);
this.year = intCalendar.Get(Sharpen.CalendarEnum.Year);
this.month = intCalendar.Get(Sharpen.CalendarEnum.Month) + 1;
// cal is from 0..12
this.day = intCalendar.Get(Sharpen.CalendarEnum.DayOfMonth);
this.hour = intCalendar.Get(Sharpen.CalendarEnum.HourOfDay);
this.minute = intCalendar.Get(Sharpen.CalendarEnum.Minute);
this.second = intCalendar.Get(Sharpen.CalendarEnum.Second);
this.nanoSeconds = intCalendar.Get(Sharpen.CalendarEnum.Millisecond) * 1000000;
this.timeZone = intCalendar.GetTimeZone();
// object contains all date components
hasDate = hasTime = hasTimeZone = true;
}