Package javax.time.calendar.zone

Class ResourceZoneRulesDataProvider

  • All Implemented Interfaces:
    ZoneRulesDataProvider
    final class ResourceZoneRulesDataProvider
extends java.lang.Object
implements ZoneRulesDataProvider
    Loads time-zone rules stored in a file accessed via class loader.

    ResourceZoneRulesDataProvider is thread-safe and immutable.

    • Field Summary

      Fields 
      Modifier and Type Field Description
      private java.lang.String groupID
      The group ID.
      private java.util.Set<java.lang.String> regions
      All the regions in the provider.
      private java.util.concurrent.atomic.AtomicReferenceArray<java.lang.Object> rules
      The rules.
      private java.util.Set<ZoneRulesVersion> versions
      All the versions in the provider.

    • Constructor Summary

      Constructors 
      Modifier Constructor Description
      private ResourceZoneRulesDataProvider​(java.net.URL url)
      Loads the rules from a URL, often in a jar file.

    • Method Summary

      All Methods Static Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      java.lang.String getGroupID()
      Gets the time-zone group ID of the data available via this provider, such as 'TZDB'.
      java.util.Set<java.lang.String> getRegionIDs()
      Gets the provided region IDs.
      java.util.Set<ZoneRulesVersion> getVersions()
      Gets the provided rules, version by version.
      (package private) static void load()
      Loads any time-zone rules data stored in files.
      private static java.util.List<ResourceZoneRulesDataProvider> loadResources()
      Loads the rules from files in the class loader, often jar files.
      (package private) ZoneRules loadRule​(short index)
      Loads the rule.
      java.lang.String toString()  

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

    • Field Detail

      • groupID

        private final java.lang.String groupID
        The group ID.

      • versions

        private final java.util.Set<ZoneRulesVersion> versions
        All the versions in the provider.

      • regions

        private final java.util.Set<java.lang.String> regions
        All the regions in the provider.

      • rules

        private final java.util.concurrent.atomic.AtomicReferenceArray<java.lang.Object> rules
        The rules.

    • Constructor Detail

      • ResourceZoneRulesDataProvider

        private ResourceZoneRulesDataProvider​(java.net.URL url)
                               throws java.lang.ClassNotFoundException,
                                      java.io.IOException
        Loads the rules from a URL, often in a jar file.
        Parameters:
        providers - the list to add to, not null
        url - the jar file to load, not null
        Throws:
        java.lang.Exception - if an error occurs
        java.lang.ClassNotFoundException
        java.io.IOException

    • Method Detail

      • load

        static void load()
        Loads any time-zone rules data stored in files.
        Throws:
        java.lang.RuntimeException - if the time-zone rules cannot be loaded

      • loadResources

        private static java.util.List<ResourceZoneRulesDataProvider> loadResources()
        Loads the rules from files in the class loader, often jar files.
        Returns:
        the list of loaded rules, never null
        Throws:
        java.lang.Exception - if an error occurs

      • getGroupID

        public java.lang.String getGroupID()
        Gets the time-zone group ID of the data available via this provider, such as 'TZDB'.

        Group IDs must match regex [A-Za-z0-9._-]+. Group IDs should use reverse domain name notation, like packages. Group IDs without a dot are reserved.

        Specified by:
        getGroupID in interface ZoneRulesDataProvider
        Returns:
        the ID of the group, never null

      • getRegionIDs

        public java.util.Set<java.lang.String> getRegionIDs()
        Gets the provided region IDs.
        Specified by:
        getRegionIDs in interface ZoneRulesDataProvider
        Returns:
        the provided region IDs, not to be modified, never null

      • loadRule

        ZoneRules loadRule​(short index)
            throws java.lang.Exception
        Loads the rule.
        Parameters:
        index - the index to retrieve
        Returns:
        the rules, should not be null
        Throws:
        java.lang.Exception

      • toString

        public java.lang.String toString()
        Overrides:
        toString in class java.lang.Object