Package com.formdev.flatlaf.util

Class SoftCache<K,V>

java.lang.Object

com.formdev.flatlaf.util.SoftCache<K,V>

All Implemented Interfaces:

Map<K,V>

public class SoftCache<K,V>
extends Object
implements Map<K,V>

A simple cache (map) that uses soft references for the values.

Since:

2

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
private static class	SoftCache.CacheReference<K,V>

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

Map.Entry<K,V>

Field Summary

Fields

Modifier and Type	Field	Description
private final Map<K,SoftCache.CacheReference<K,V>>	map
private final ReferenceQueue<V>	queue

Constructor Summary

Constructors

Constructor	Description
SoftCache()
SoftCache(int initialCapacity)

Method Summary

Modifier and Type	Method	Description
void	clear()
boolean	containsKey(Object key)
boolean	containsValue(Object value)	Not supported.
Set<Map.Entry<K,V>>	entrySet()	Not supported.
private void	expungeStaleEntries()
void	forEach(BiConsumer<? super K,? super V> action)	Not supported.
V	get(Object key)
private V	getRef(SoftCache.CacheReference<K,V> ref)
boolean	isEmpty()
Set<K>	keySet()
V	put(K key, V value)
void	putAll(Map<? extends K,? extends V> m)
V	remove(Object key)
void	replaceAll(BiFunction<? super K,? super V,? extends V> function)	Not supported.
int	size()
Collection<V>	values()	Not supported.

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, getOrDefault, hashCode, merge, putIfAbsent, remove, replace, replace

Field Details

map

private final Map<K,SoftCache.CacheReference<K,V>> map

queue

private final ReferenceQueue<V> queue

Constructor Details

SoftCache

public SoftCache()

SoftCache

public SoftCache(int initialCapacity)

Method Details

size

public int size()

Specified by:

size in interface Map<K,V>

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface Map<K,V>

containsKey

public boolean containsKey(Object key)

Specified by:

containsKey in interface Map<K,V>

containsValue

public boolean containsValue(Object value)

Not supported. Throws UnsupportedOperationException.

Specified by:

containsValue in interface Map<K,V>

get

public V get(Object key)

Specified by:

get in interface Map<K,V>

put

public V put(K key,
 V value)

Specified by:

put in interface Map<K,V>

remove

public V remove(Object key)

Specified by:

remove in interface Map<K,V>

getRef

private V getRef(SoftCache.CacheReference<K,V> ref)

putAll

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

Specified by:

putAll in interface Map<K,V>

clear

public void clear()

Specified by:

clear in interface Map<K,V>

keySet

public Set<K> keySet()

Specified by:

keySet in interface Map<K,V>

values

public Collection<V> values()

Not supported. Throws UnsupportedOperationException.

Specified by:

values in interface Map<K,V>

entrySet

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

Not supported. Throws UnsupportedOperationException.

Specified by:

entrySet in interface Map<K,V>

forEach

public void forEach(BiConsumer<? super K,? super V> action)

Not supported. Throws UnsupportedOperationException.

Specified by:

forEach in interface Map<K,V>

replaceAll

public void replaceAll(BiFunction<? super K,? super V,? extends V> function)

Not supported. Throws UnsupportedOperationException.

Specified by:

replaceAll in interface Map<K,V>

expungeStaleEntries

private void expungeStaleEntries()