net.didion.jwnl.util.cache
Class LRUCache

java.lang.Object
  java.util.AbstractMap<K,V>
      java.util.HashMap<K,V>
          java.util.LinkedHashMap
              net.didion.jwnl.util.cache.LRUCache

All Implemented Interfaces:

Serializable, Cloneable, Map, Cache

public class LRUCache
extends LinkedHashMap
implements Cache

A fixed-capacity Cache that stores the most recently used elements. Once the cache reaches capacity, the least recently used elements will be removed.

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class java.util.AbstractMap

AbstractMap.SimpleEntry<K,V>, AbstractMap.SimpleImmutableEntry<K,V>

Constructor Summary

LRUCache(int capacity)

Method Summary

int	getCapacity() Returns the maximum number of elements the cache can hold.
int	getSize() Returns the current size of the cache.
boolean	isFull()
protected boolean	removeEldestEntry(Map.Entry eldest)
int	setCapacity(int capacity) Set the maximum number of elements the cache can hold.

Methods inherited from class java.util.LinkedHashMap

clear, containsValue, get

Methods inherited from class java.util.HashMap

clone, containsKey, entrySet, isEmpty, keySet, put, putAll, remove, size, values

Methods inherited from class java.util.AbstractMap

equals, hashCode, toString

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface net.didion.jwnl.util.cache.Cache

clear, get, put, remove

Methods inherited from interface java.util.Map

containsKey, entrySet, equals, hashCode, isEmpty, keySet, put, putAll, remove, size, values

Constructor Detail

LRUCache

public LRUCache(int capacity)

Parameters:

capacity - the maximum number of elements that can be contained in the cache.

Method Detail

isFull

public boolean isFull()

removeEldestEntry

protected boolean removeEldestEntry(Map.Entry eldest)

Overrides:

removeEldestEntry in class LinkedHashMap

setCapacity

public int setCapacity(int capacity)

Description copied from interface: Cache

Set the maximum number of elements the cache can hold.

Specified by:

setCapacity in interface Cache

getCapacity

public int getCapacity()

Description copied from interface: Cache

Returns the maximum number of elements the cache can hold.

Specified by:

getCapacity in interface Cache

getSize

public int getSize()

Description copied from interface: Cache

Returns the current size of the cache.

Specified by:

getSize in interface Cache