/// <summary>
/// Registers the provider.
/// </summary>
/// <param name="provider"> the provider to register, not null </param>
/// <exception cref="ZoneRulesException"> if unable to complete the registration </exception>
private static void RegisterProvider0(ZoneRulesProvider provider)
{
foreach (String zoneId in provider.ProvideZoneIds())
{
Objects.RequireNonNull(zoneId, "zoneId");
ZoneRulesProvider old = ZONES.PutIfAbsent(zoneId, provider);
if (old != null)
{
throw new ZoneRulesException("Unable to register zone as one already registered with that ID: " + zoneId + ", currently loading from provider: " + provider);
}
}
}
/// <summary>
/// Gets the provider for the zone ID.
/// </summary>
/// <param name="zoneId"> the zone ID as defined by {@code ZoneId}, not null </param>
/// <returns> the provider, not null </returns>
/// <exception cref="ZoneRulesException"> if the zone ID is unknown </exception>
private static ZoneRulesProvider GetProvider(String zoneId)
{
ZoneRulesProvider provider = ZONES[zoneId];
if (provider == null)
{
if (ZONES.Count == 0)
{
throw new ZoneRulesException("No time-zone data files registered");
}
throw new ZoneRulesException("Unknown time-zone ID: " + zoneId);
}
return(provider);
}
public virtual Object Run()
{
String prop = System.getProperty("java.time.zone.DefaultZoneRulesProvider");
if (prop != null)
{
try
{
Class c = Class.ForName(prop, true, ClassLoader.SystemClassLoader);
ZoneRulesProvider provider = typeof(ZoneRulesProvider).cast(c.NewInstance());
RegisterProvider(provider);
Loaded.Add(provider);
}
catch (Exception x)
{
throw new Error(x);
}
}
else
{
RegisterProvider(new TzdbZoneRulesProvider());
}
return(null);
}
//-------------------------------------------------------------------------
/// <summary>
/// Registers a zone rules provider.
/// <para>
/// This adds a new provider to those currently available.
/// A provider supplies rules for one or more zone IDs.
/// A provider cannot be registered if it supplies a zone ID that has already been
/// registered. See the notes on time-zone IDs in <seealso cref="ZoneId"/>, especially
/// the section on using the concept of a "group" to make IDs unique.
/// </para>
/// <para>
/// To ensure the integrity of time-zones already created, there is no way
/// to deregister providers.
///
/// </para>
/// </summary>
/// <param name="provider"> the provider to register, not null </param>
/// <exception cref="ZoneRulesException"> if a zone ID is already registered </exception>
public static void RegisterProvider(ZoneRulesProvider provider)
{
Objects.RequireNonNull(provider, "provider");
RegisterProvider0(provider);
PROVIDERS.Add(provider);
}