/// <summary>
/// Gets an iterator of text to field for the specified chrono, field, locale and style
/// for the purpose of parsing.
/// <para>
/// The iterator must be returned in order from the longest text to the shortest.
/// </para>
/// <para>
/// The null return value should be used if there is no applicable parsable text, or
/// if the text would be a numeric representation of the value.
/// Text can only be parsed if all the values for that field-style-locale combination are unique.
///
/// </para>
/// </summary>
/// <param name="chrono"> the Chronology to get text for, not null </param>
/// <param name="field"> the field to get text for, not null </param>
/// <param name="style"> the style to get text for, null for all parsable text </param>
/// <param name="locale"> the locale to get text for, not null </param>
/// <returns> the iterator of text to field pairs, in order from longest text to shortest text,
/// null if the field or style is not parsable </returns>
public virtual IEnumerator <Map_Entry <String, Long> > GetTextIterator(Chronology chrono, TemporalField field, TextStyle style, Locale locale)
{
if (chrono == IsoChronology.INSTANCE || !(field is ChronoField))
{
return(GetTextIterator(field, style, locale));
}
int fieldIndex;
switch ((ChronoField)field)
{
case ERA:
fieldIndex = DateTime.ERA;
break;
case MONTH_OF_YEAR:
fieldIndex = DateTime.MONTH;
break;
case DAY_OF_WEEK:
fieldIndex = DateTime.DAY_OF_WEEK;
break;
case AMPM_OF_DAY:
fieldIndex = DateTime.AM_PM;
break;
default:
return(null);
}
int calendarStyle = (style == null) ? DateTime.ALL_STYLES : style.toCalendarStyle();
IDictionary <String, Integer> map = CalendarDataUtility.retrieveJavaTimeFieldValueNames(chrono.CalendarType, fieldIndex, calendarStyle, locale);
if (map == null)
{
return(null);
}
IList <Map_Entry <String, Long> > list = new List <Map_Entry <String, Long> >(map.Count);
switch (fieldIndex)
{
case DateTime.ERA:
foreach (Map_Entry <String, Integer> entry in map)
{
int era = entry.Value;
if (chrono == JapaneseChronology.INSTANCE)
{
if (era == 0)
{
era = -999;
}
else
{
era -= 2;
}
}
list.Add(CreateEntry(entry.Key, (long)era));
}
break;
case DateTime.MONTH:
foreach (Map_Entry <String, Integer> entry in map)
{
list.Add(CreateEntry(entry.Key, (long)(entry.Value + 1)));
}
break;
case DateTime.DAY_OF_WEEK:
foreach (Map_Entry <String, Integer> entry in map)
{
list.Add(CreateEntry(entry.Key, (long)ToWeekDay(entry.Value)));
}
break;
default:
foreach (Map_Entry <String, Integer> entry in map)
{
list.Add(CreateEntry(entry.Key, (long)entry.Value));
}
break;
}
return(list.GetEnumerator());
}
/// <summary>
/// Gets the text for the specified chrono, field, locale and style
/// for the purpose of formatting.
/// <para>
/// The text associated with the value is returned.
/// The null return value should be used if there is no applicable text, or
/// if the text would be a numeric representation of the value.
///
/// </para>
/// </summary>
/// <param name="chrono"> the Chronology to get text for, not null </param>
/// <param name="field"> the field to get text for, not null </param>
/// <param name="value"> the field value to get text for, not null </param>
/// <param name="style"> the style to get text for, not null </param>
/// <param name="locale"> the locale to get text for, not null </param>
/// <returns> the text for the field value, null if no text found </returns>
public virtual String GetText(Chronology chrono, TemporalField field, long value, TextStyle style, Locale locale)
{
if (chrono == IsoChronology.INSTANCE || !(field is ChronoField))
{
return(GetText(field, value, style, locale));
}
int fieldIndex;
int fieldValue;
if (field == ERA)
{
fieldIndex = DateTime.ERA;
if (chrono == JapaneseChronology.INSTANCE)
{
if (value == -999)
{
fieldValue = 0;
}
else
{
fieldValue = (int)value + 2;
}
}
else
{
fieldValue = (int)value;
}
}
else if (field == MONTH_OF_YEAR)
{
fieldIndex = DateTime.MONTH;
fieldValue = (int)value - 1;
}
else if (field == DAY_OF_WEEK)
{
fieldIndex = DateTime.DAY_OF_WEEK;
fieldValue = (int)value + 1;
if (fieldValue > 7)
{
fieldValue = DayOfWeek.Sunday;
}
}
else if (field == AMPM_OF_DAY)
{
fieldIndex = DateTime.AM_PM;
fieldValue = (int)value;
}
else
{
return(null);
}
return(CalendarDataUtility.retrieveJavaTimeFieldValueName(chrono.CalendarType, fieldIndex, fieldValue, style.toCalendarStyle(), locale));
}
