Package com.db4o.internal.caching

Class NullCache4<K,​V>

  • All Implemented Interfaces:
    Cache4<K,​V>, java.lang.Iterable<V>
    public class NullCache4<K,​V>
extends java.lang.Object
implements Cache4<K,​V>

    • Constructor Summary

      Constructors 
      Constructor Description
      NullCache4()  

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      java.util.Iterator<V> iterator()  
      V produce​(K key, Function4<K,​V> producer, Procedure4<V> onDiscard)
      Retrieves the value associated to the key from the cache.

      • Methods inherited from class java.lang.Object

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

      • Methods inherited from interface java.lang.Iterable

        forEach, spliterator

    • Constructor Detail

      • NullCache4

        public NullCache4()

    • Method Detail

      • produce

        public V produce​(K key,
                 Function4<K,​V> producer,
                 Procedure4<V> onDiscard)
        Description copied from interface: Cache4
        Retrieves the value associated to the key from the cache. If the value is not yet cached producer will be called to produce it. If the cache needs to discard a value finalizer will be given a chance to process it.
        Specified by:
        produce in interface Cache4<K,​V>
        Parameters:
        key - the key for the value - must never change - cannot be null
        producer - will be called if value not yet in the cache - can only be null when the value is found in the cache
        onDiscard - will be called if a page needs to be discarded - can be null
        Returns:
        the cached value

      • iterator

        public java.util.Iterator<V> iterator()
        Specified by:
        iterator in interface java.lang.Iterable<K>