public Class DefaultZoneRulesProvider

Overrides java.time.zone.ZoneRulesProvider.provideRefresh.

Doc from java.time.zone.ZoneRulesProvider.provideRefresh.

SPI method to refresh the rules from the underlying data provider.

This method provides the opportunity for a provider to dynamically recheck the underlying data provider to find the latest rules. This could be used to load new rules without stopping the JVM. Dynamic behavior is entirely optional and most providers do not support it.

This implementation returns false.

Returns:boolean

true if the rules were updated

Annotations

@Override

Implements abstract java.time.zone.ZoneRulesProvider.provideRules.

Doc from java.time.zone.ZoneRulesProvider.provideRules.

SPI method to get the rules for the zone ID.

This loads the rules for the specified zone ID. The provider implementation must validate that the zone ID is valid and available, throwing a ZoneRulesException if it is not. The result of the method in the valid case depends on the caching flag.

If the provider implementation is not dynamic, then the result of the method must be the non-null set of rules selected by the ID.

If the provider implementation is dynamic, then the flag gives the option of preventing the returned rules from being cached in ZoneId. When the flag is true, the provider is permitted to return null, where null will prevent the rules from being cached in ZoneId. When the flag is false, the provider must return non-null rules.

Parameters

zoneId:String

the zone ID as defined by ZoneId, not null

forCaching:boolean

whether the rules are being queried for caching, true if the returned rules will be cached by ZoneId, false if they will be returned to the user without being cached in ZoneId

Returns:ZoneRules

the rules, null if forCaching is true and this is a dynamic provider that wants to prevent caching in ZoneId, otherwise not null

Annotations

@Override

Implements abstract java.time.zone.ZoneRulesProvider.provideVersions.

Doc from java.time.zone.ZoneRulesProvider.provideVersions.

SPI method to get the history of rules for the zone ID.

This returns a map of historical rules keyed by a version string. The exact meaning and format of the version is provider specific. The version must follow lexicographical order, thus the returned map will be order from the oldest known rules to the newest available rules. The default 'TZDB' group uses version numbering consisting of the year followed by a letter, such as '2009e' or '2012f'.

Implementations must provide a result for each valid zone ID, however they do not have to provide a history of rules. Thus the map will contain at least one element, and will only contain more than one element if historical rule information is available.

The returned versions remain available and valid for the lifetime of the application. A dynamic provider may increase the set of versions as more data becomes available.

Parameters

zoneId:String

the zone ID as defined by ZoneId, not null

Returns:NavigableMap<String, ZoneRules>

a modifiable copy of the history of the rules for the ID, sorted from oldest to newest, not null

Annotations

@Override

Implements abstract java.time.zone.ZoneRulesProvider.provideZoneIds.

Doc from java.time.zone.ZoneRulesProvider.provideZoneIds.

SPI method to get the available zone IDs.

This obtains the IDs that this ZoneRulesProvider provides. A provider should provide data for at least one zone ID.

The returned zone IDs remain available and valid for the lifetime of the application. A dynamic provider may increase the set of IDs as more data becomes available.

Returns:Set<String>

the set of zone IDs being provided, not null

Annotations

@Override