Package org.h2.util

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 java.util.AbstractMap

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

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 java.util.LinkedHashMap

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

Methods inherited from class java.util.HashMap

clone, compute, computeIfAbsent, computeIfPresent, containsKey, isEmpty, merge, newHashMap, 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

Methods inherited from interface java.util.SequencedMap

firstEntry, lastEntry, pollFirstEntry, pollLastEntry

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>