public static string GetStandardPattern(char format, DateTimeFormatInfo dfi, bool forDateTimeOffset, out bool useutc, out bool use_invariant, out bool needsTranslation)
{
String pattern;
useutc = false;
use_invariant = false;
needsTranslation = true;
switch (format)
{
case 'd':
if(dfi.ShortDatePattern != null)
pattern = dfi.ShortDatePattern;
else
{
pattern = dfi.GetJavaPattern(DateFormat.SHORT, -1);
needsTranslation = false;
}
break;
case 'D':
if (dfi.LongDatePattern != null)
pattern = dfi.LongDatePattern;
else
{
pattern = dfi.GetJavaPattern(DateFormat.FULL, -1);
needsTranslation = false;
}
break;
case 'f':
if (dfi.LongDatePattern != null && dfi.ShortTimePattern != null)
pattern = dfi.LongDatePattern + " " + dfi.ShortTimePattern;
else
{
pattern = dfi.GetJavaPattern(DateFormat.FULL, DateFormat.SHORT);
needsTranslation = false;
}
break;
case 'F':
if (dfi.FullDateTimePattern != null)
pattern = dfi.FullDateTimePattern;
else
{
pattern = dfi.GetJavaPattern(DateFormat.FULL, DateFormat.MEDIUM);
needsTranslation = false;
}
break;
case 'g':
if (dfi.ShortDatePattern != null && dfi.ShortTimePattern != null)
pattern = dfi.ShortDatePattern + " " + dfi.ShortTimePattern;
else
{
pattern = dfi.GetJavaPattern(DateFormat.SHORT, DateFormat.SHORT);
needsTranslation = false;
}
break;
case 'G':
if (dfi.ShortDatePattern != null && dfi.LongTimePattern != null)
pattern = dfi.ShortDatePattern + " " + dfi.LongTimePattern;
else
{
pattern = dfi.GetJavaPattern(DateFormat.SHORT, DateFormat.MEDIUM);
needsTranslation = false;
}
break;
case 'm':
case 'M':
pattern = dfi.MonthDayPattern;
break;
case 'o':
case 'O':
pattern = dfi.RoundtripPattern;
use_invariant = true;
break;
case 'r':
case 'R':
pattern = dfi.RFC1123Pattern;
if (forDateTimeOffset)
useutc = true;
use_invariant = true;
break;
case 's':
pattern = dfi.SortableDateTimePattern;
use_invariant = true;
break;
case 't':
if (dfi.ShortTimePattern != null)
pattern = dfi.ShortTimePattern;
else
{
pattern = dfi.GetJavaPattern(-1, DateFormat.SHORT);
needsTranslation = false;
}
break;
case 'T':
if (dfi.LongTimePattern != null)
pattern = dfi.LongTimePattern;
else
{
pattern = dfi.GetJavaPattern(-1, DateFormat.MEDIUM);
needsTranslation = false;
}
break;
case 'u':
pattern = dfi.UniversalSortableDateTimePattern;
if (forDateTimeOffset)
useutc = true;
use_invariant = true;
break;
case 'U':
if (forDateTimeOffset)
pattern = null;
else
{
if (dfi.FullDateTimePattern != null)
pattern = dfi.FullDateTimePattern;
else
{
pattern = dfi.GetJavaPattern(DateFormat.FULL, DateFormat.MEDIUM);
needsTranslation = false;
}
useutc = true;
}
break;
case 'y':
case 'Y':
pattern = dfi.YearMonthPattern;
break;
default:
pattern = null;
break;
}
return pattern;
}