Class SoftHashMap<K,V>

java.lang.Object

java.util.AbstractMap<K,V>

org.pushingpixels.radiance.theming.internal.utils.SoftHashMap<K,V>

All Implemented Interfaces:

Serializable, Map<K,V>

class SoftHashMap<K,V>
extends AbstractMap<K,V>
implements Serializable

The original implementation is taken from The Java Specialists' Newsletter [Issue 098] with permission of the original author. Tweaked code by Endre Stolsvik was contributed in December 2009.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	SoftHashMap.KeySoftReference<K,V>

Nested classes/interfaces inherited from class AbstractMap

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

Nested classes/interfaces inherited from interface Map

Map.Entry<K,V>

Field Summary

Fields

Modifier and Type	Field	Description
private final Map<K, SoftHashMap.KeySoftReference<K,V>>	hash	The internal HashMap that will hold the SoftReference.
private final ReferenceQueue<V>	queue	Reference queue for cleared SoftReference objects.

Constructor Summary

Constructors

Constructor	Description
SoftHashMap()

Method Summary

Modifier and Type	Method	Description
void	clear()
boolean	containsKey(Object key)
Set<Map.Entry<K,V>>	entrySet()	Returns a copy of the key/values in the map at the point of calling.
private void	expungeStaleEntries()
V	get(Object key)
V	put(K key, V value)
V	remove(Object key)
int	size()

Methods inherited from class AbstractMap

clone, containsValue, equals, hashCode, isEmpty, keySet, putAll, toString, values

Methods inherited from class Object

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

Methods inherited from interface Map

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

Field Details

hash

private final Map<K, SoftHashMap.KeySoftReference<K,V>> hash

The internal HashMap that will hold the SoftReference.

queue

private final ReferenceQueue<V> queue

Reference queue for cleared SoftReference objects.

Constructor Details

SoftHashMap

SoftHashMap()

Method Details

get

public V get(Object key)

Specified by:

get in interface Map<K,V>

Overrides:

get in class AbstractMap<K,V>

expungeStaleEntries

private void expungeStaleEntries()

put

public V put(K key,
 V value)

Specified by:

put in interface Map<K,V>

Overrides:

put in class AbstractMap<K,V>

remove

public V remove(Object key)

Specified by:

remove in interface Map<K,V>

Overrides:

remove in class AbstractMap<K,V>

clear

public void clear()

Specified by:

clear in interface Map<K,V>

Overrides:

clear in class AbstractMap<K,V>

size

public int size()

Specified by:

size in interface Map<K,V>

Overrides:

size in class AbstractMap<K,V>

containsKey

public boolean containsKey(Object key)

Specified by:

containsKey in interface Map<K,V>

Overrides:

containsKey in class AbstractMap<K,V>

entrySet

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

Returns a copy of the key/values in the map at the point of calling. However, setValue still sets the value in the actual SoftHashMap.

Specified by:

entrySet in interface Map<K,V>

Specified by:

entrySet in class AbstractMap<K,V>