net.sf.extjwnl.util.cache

Class LRUCache<K,V>

java.lang.Object

net.sf.extjwnl.util.cache.LRUCache<K,V>

All Implemented Interfaces:

java.util.Map<K,V>, Cache<K,V>

public class LRUCache<K,V>
extends java.lang.Object
implements Cache<K,V>

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

Nested Class Summary

Nested classes/interfaces inherited from interface java.util.Map

java.util.Map.Entry<K,V>

Constructor Summary

Constructors

Constructor and Description
LRUCache(int capacity)

Method Summary

Modifier and Type	Method and Description
void	clear()
boolean	containsKey(java.lang.Object key)
boolean	containsValue(java.lang.Object value)
java.util.Set<java.util.Map.Entry<K,V>>	entrySet()
V	get(java.lang.Object key)
long	getCapacity() Returns the maximum number of elements the cache can hold.
boolean	isEmpty()
java.util.Set<K>	keySet()
V	put(K key, V value)
void	putAll(java.util.Map<? extends K,? extends V> m)
V	remove(java.lang.Object key)
void	setCapacity(long capacity) Sets the maximum number of elements the cache can hold.
int	size()
java.util.Collection<V>	values()

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Map

compute, computeIfAbsent, computeIfPresent, equals, forEach, getOrDefault, hashCode, merge, putIfAbsent, remove, replace, replace, replaceAll

Constructor Detail

LRUCache

public LRUCache(int capacity)

Parameters:

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

Method Detail

setCapacity

public void setCapacity(long capacity)

Description copied from interface: Cache

Sets the maximum number of elements the cache can hold.

Specified by:

setCapacity in interface Cache<K,V>

Parameters:

capacity - capacity

getCapacity

public long getCapacity()

Description copied from interface: Cache

Returns the maximum number of elements the cache can hold.

Specified by:

getCapacity in interface Cache<K,V>

Returns:

the maximum number of elements the cache can hold

size

public int size()

Specified by:

size in interface java.util.Map<K,V>

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface java.util.Map<K,V>

containsKey

public boolean containsKey(java.lang.Object key)

Specified by:

containsKey in interface java.util.Map<K,V>

containsValue

public boolean containsValue(java.lang.Object value)

Specified by:

containsValue in interface java.util.Map<K,V>

get

public V get(java.lang.Object key)

Specified by:

get in interface java.util.Map<K,V>

put

public V put(K key,
             V value)

Specified by:

put in interface java.util.Map<K,V>

remove

public V remove(java.lang.Object key)

Specified by:

remove in interface java.util.Map<K,V>

putAll

public void putAll(java.util.Map<? extends K,? extends V> m)

Specified by:

putAll in interface java.util.Map<K,V>

clear

public void clear()

Specified by:

clear in interface java.util.Map<K,V>

keySet

public java.util.Set<K> keySet()

Specified by:

keySet in interface java.util.Map<K,V>

values

public java.util.Collection<V> values()

Specified by:

values in interface java.util.Map<K,V>

entrySet

public java.util.Set<java.util.Map.Entry<K,V>> entrySet()

Specified by:

entrySet in interface java.util.Map<K,V>