Package org.apache.jena.atlas.lib.cache

Class Cache0<K,V>

java.lang.Object
org.apache.jena.atlas.lib.cache.Cache0<K,V>
All Implemented Interfaces:
Cache<K,V>
public final class Cache0<K,V> extends Object implements Cache<K,V>
A cache that keeps nothing

  • Constructor Details

    • Cache0

      public Cache0()

  • Method Details

    • containsKey

      public boolean containsKey(K key)
      Description copied from interface: Cache
      Does the cache contain the key?
      Specified by:
      containsKey in interface Cache<K,V>

    • getIfPresent

      public V getIfPresent(K key)
      Description copied from interface: Cache
      Get from cache - or return null.
      Specified by:
      getIfPresent in interface Cache<K,V>

    • getOrFill

      public V getOrFill(K key, Callable<V> callable)
      Description copied from interface: Cache
      Get from cache, of not present, call the Callable to try to fill the cache. This operation should be atomic.
      Specified by:
      getOrFill in interface Cache<K,V>

    • put

      public void put(K key, V thing)
      Description copied from interface: Cache
      Insert into the cache
      Specified by:
      put in interface Cache<K,V>

    • remove

      public void remove(K key)
      Description copied from interface: Cache
      Remove from cache - return true if key referenced an entry
      Specified by:
      remove in interface Cache<K,V>

    • keys

      public Iterator<K> keys()
      Description copied from interface: Cache
      Iterate over all keys. Iterating over the keys requires the caller be thread-safe.
      Specified by:
      keys in interface Cache<K,V>

    • isEmpty

      public boolean isEmpty()
      Specified by:
      isEmpty in interface Cache<K,V>

    • clear

      public void clear()
      Specified by:
      clear in interface Cache<K,V>

    • size

      public long size()
      Description copied from interface: Cache
      Current size of cache
      Specified by:
      size in interface Cache<K,V>

    • setDropHandler

      public void setDropHandler(BiConsumer<K,V> dropHandler)
      Description copied from interface: Cache
      Register a callback - called when an object is dropped from the cache (optional operation)
      Specified by:
      setDropHandler in interface Cache<K,V>