/// <summary>
/// Adds a recurring savings rule to the time zone builder.
/// </summary>
/// <param name="builder">The <see cref="DateTimeZoneBuilder" /> to add to.</param>
/// <param name="nameFormat">The name format pattern.</param>
/// <param name="ruleSet">The <see cref="ZoneRecurrenceCollection" /> describing the recurring savings.</param>
private static void AddRecurring(DateTimeZoneBuilder builder, String nameFormat, IEnumerable<ZoneRule> ruleSet)
{
foreach (var rule in ruleSet)
{
builder.AddRecurringSavings(rule.FormatName(nameFormat), rule.Recurrence.Savings, rule.Recurrence.FromYear, rule.Recurrence.ToYear,
rule.Recurrence.YearOffset.Mode, rule.Recurrence.YearOffset.MonthOfYear, rule.Recurrence.YearOffset.DayOfMonth,
rule.Recurrence.YearOffset.DayOfWeek, rule.Recurrence.YearOffset.AdvanceDayOfWeek,
rule.Recurrence.YearOffset.TickOfDay);
}
}
/// <summary>
/// Returns a newly created <see cref="DateTimeZone" /> built from the given time zone data.
/// </summary>
/// <param name="zoneList">The time zone definition parts to add.</param>
/// <param name="ruleSets">The rule sets map to use in looking up rules for the time zones..</param>
private static DateTimeZone CreateTimeZone(ZoneList zoneList, IDictionary<string, IList<ZoneRule>> ruleSets)
{
var builder = new DateTimeZoneBuilder();
foreach (var zone in zoneList)
{
builder.SetStandardOffset(zone.Offset);
if (zone.Rules == null)
{
builder.SetFixedSavings(zone.Format, Offset.Zero);
}
else
{
try
{
// Check if iRules actually just refers to a savings.
var savings = ParserHelper.ParseOffset(zone.Rules);
builder.SetFixedSavings(zone.Format, savings);
}
catch (FormatException)
{
var rs = ruleSets[zone.Rules];
if (rs == null)
{
throw new ArgumentException("Rules not found: " + zone.Rules);
}
AddRecurring(builder, zone.Format, rs);
}
}
if (zone.Year == Int32.MaxValue)
{
break;
}
builder.AddCutover(zone.Year, TransitionMode.Wall, zone.MonthOfYear, zone.DayOfMonth, 0, true, zone.TickOfDay);
}
return builder.ToDateTimeZone(zoneList.Name);
}
