Class SmallLRUCache<K,V>

java.lang.Object

java.util.AbstractMap<K,V>

java.util.HashMap<K,V>

java.util.LinkedHashMap<K,V>

org.h2.util.SmallLRUCache<K,V>

Type Parameters:

K - the key

V - the value

All Implemented Interfaces:

Serializable, Cloneable, Map<K,V>, SequencedMap<K,V>

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

This class implements a small LRU object cache.

See Also:

• Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class AbstractMap

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

Field Summary

Fields

Modifier and Type	Field	Description
private static final long	serialVersionUID
private int	size

Constructor Summary

Constructors

Modifier	Constructor	Description
private	SmallLRUCache(int size)

Method Summary

Modifier and Type	Method	Description
static <K,V> SmallLRUCache<K,V>	newInstance(int size)	Create a new object with all elements of the given collection.
protected boolean	removeEldestEntry(Map.Entry<K,V> eldest)
void	setMaxSize(int size)

Methods inherited from class LinkedHashMap

clear, containsValue, entrySet, forEach, get, getOrDefault, keySet, newLinkedHashMap, putFirst, putLast, replaceAll, reversed, sequencedEntrySet, sequencedKeySet, sequencedValues, values

Methods inherited from class HashMap

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

Methods inherited from class AbstractMap

equals, hashCode, toString

Methods inherited from class Object

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

Methods inherited from interface Map

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

Methods inherited from interface SequencedMap

firstEntry, lastEntry, pollFirstEntry, pollLastEntry

Field Details

serialVersionUID

private static final long serialVersionUID

See Also:

• Constant Field Values

size

private int size

Constructor Details

SmallLRUCache

private SmallLRUCache(int size)

Method Details

newInstance

public static <K,V> SmallLRUCache<K,V> newInstance(int size)

Create a new object with all elements of the given collection.

Type Parameters:

K - the key type

V - the value type

Parameters:

size - the number of elements

Returns:

the object

setMaxSize

public void setMaxSize(int size)

removeEldestEntry

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

Overrides:

removeEldestEntry in class LinkedHashMap<K,V>