private IEnumerable <TimeZoneImplementation> GetTimeZoneImplementations(Guid timeZoneId,
TzDbZoneDefinition tzDbZoneDefinition, IEnumerable <IGrouping <string, TzDbRule> > tzDbRuleGroups)
{
// get the daylightSavingsAdjustment for the current zone
AbstractDaylightSavingsAdjustment offsetAdjustment =
FindOrCreateDaylightSavingsAdjustment(tzDbZoneDefinition.Zone.Rules, tzDbRuleGroups);
var timeZoneImplementations = new List <TimeZoneImplementation>
{
tzDbZoneDefinition.Zone.ToTimeZoneImplementation(offsetAdjustment)
};
// process the zone continuations for the current zone
foreach (TzDbZoneContinuation tzDbZoneContinuation in tzDbZoneDefinition.ContinuationLines)
{
AbstractDaylightSavingsAdjustment zoneContinuationOffsetAdjustment =
FindOrCreateDaylightSavingsAdjustment(tzDbZoneContinuation.Rules, tzDbRuleGroups);
// create a TimeZoneImplementation from this zone definitions zone continuation
timeZoneImplementations.Add(
tzDbZoneContinuation.ToTimeZoneImplementation(zoneContinuationOffsetAdjustment));
}
return(timeZoneImplementations);
}
private IEnumerable <TimeZoneAlias> FindTimeZoneAliases(TzDbZoneDefinition tzDbZoneDefinition,
IEnumerable <TzDbLink> tzDbLinks)
{
return
(tzDbLinks.Where(tzDbLink => tzDbLink.LinkFrom == tzDbZoneDefinition.Zone.Name)
.Select(tzDbLink => tzDbLink.ToTimeZoneAlias()));
}
private TzDbZoneDescription FindTzDbZoneDescription(TzDbZoneDefinition tzDbZoneDefinition,
IEnumerable <TzDbZoneDescription> tzDbZoneDescriptions, IEnumerable <TimeZoneAlias> aliases)
{
TzDbZoneDescription description =
tzDbZoneDescriptions.SingleOrDefault(
tzDbZoneDescription => tzDbZoneDescription.Tz == tzDbZoneDefinition.Zone.Name);
if (null == description)
{
tzDbZoneDescriptions.SingleOrDefault(
tzDbZoneDescription => aliases.Any(alias => alias.Name == tzDbZoneDescription.Tz));
}
return(description);
}
public static bool TryParse(Queue <Token> unProcessedTokens, out TzDbZoneDefinition tzDbZoneDefinition)
{
try
{
// the value of the first token of every zone entry is Zone
TzDbZone?tzDbZone;
if (ZoneExpression.TryParse(unProcessedTokens, out tzDbZone))
{
// if Until column of zone line is null this zone has no continuation lines
if (null == tzDbZone.Value.Until)
{
tzDbZoneDefinition = new TzDbZoneDefinition(tzDbZone.Value, new List <TzDbZoneContinuation>());
return(true);
}
// dequeue start of line token and discard
unProcessedTokens.Dequeue();
var continuationLines = new List <TzDbZoneContinuation>
{
ZoneContinuationExpression.Parse(unProcessedTokens, tzDbZone.Value.Name)
};
// keep parsing zone continuations until we hit one that has a null until column
while (null != continuationLines.Last().Until)
{
// dequeue start of line token and discard
unProcessedTokens.Dequeue();
continuationLines.Add(ZoneContinuationExpression.Parse(unProcessedTokens, tzDbZone.Value.Name));
}
tzDbZoneDefinition = new TzDbZoneDefinition(tzDbZone.Value, continuationLines);
return(true);
}
tzDbZoneDefinition = null;
return(false);
}
catch (Exception e)
{
throw new Exception("Error occured while parsing zone definition", e);
}
}
