org.apache.wicket.util.collections

Class MostRecentlyUsedMap<K,V>

java.lang.Object

java.util.AbstractMap<K,V>

java.util.HashMap<K,V>

java.util.LinkedHashMap<K,V>

org.apache.wicket.util.collections.MostRecentlyUsedMap<K,V>

Type Parameters:

K - key type

V - value type

All Implemented Interfaces:

Serializable, Cloneable, Map<K,V>

public class MostRecentlyUsedMap<K,V>
extends LinkedHashMap<K,V>

Holds a map of most recently used items of a given maximum size. Old entries are expired when the map exceeds that maximum size.

Author:

Jonathan Locke

See Also:

Serialized Form

Nested Class Summary

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

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

Field Summary

Fields

Modifier and Type	Field and Description
protected V	removedValue Value most recently removed from map

Constructor Summary

Constructors

Constructor and Description
MostRecentlyUsedMap(int maxEntries) Constructor

Method Summary

Modifier and Type	Method and Description
V	getRemovedValue()
protected boolean	removeEldestEntry(Map.Entry<K,V> eldest)

Methods inherited from class java.util.LinkedHashMap

clear, containsValue, entrySet, forEach, get, getOrDefault, keySet, replaceAll, values

Methods inherited from class java.util.HashMap

clone, compute, computeIfAbsent, computeIfPresent, containsKey, isEmpty, merge, put, putAll, putIfAbsent, remove, remove, replace, replace, size

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 java.util.Map

compute, computeIfAbsent, computeIfPresent, containsKey, equals, hashCode, isEmpty, merge, put, putAll, putIfAbsent, remove, remove, replace, replace, size

Field Detail

removedValue

protected V removedValue

Value most recently removed from map

Constructor Detail

MostRecentlyUsedMap

public MostRecentlyUsedMap(int maxEntries)

Constructor

Parameters:

maxEntries - Maximum number of entries allowed in the map

Method Detail

getRemovedValue

public V getRemovedValue()

Returns:

Returns the removedValue.

removeEldestEntry

protected boolean removeEldestEntry(Map.Entry<K,V> eldest)

Overrides:

removeEldestEntry in class LinkedHashMap<K,V>

See Also:

LinkedHashMap.removeEldestEntry(java.util.Map.Entry)