Package org.infinispan.commons.util

Class WeakValueHashMap<K,V>

java.lang.Object

java.util.AbstractMap<K,V>

org.infinispan.commons.util.WeakValueHashMap<K,V>

Type Parameters:

K - the key type

V - the value type

All Implemented Interfaces:

Map<K,V>

public final class WeakValueHashMap<K,V>
extends AbstractMap<K,V>

This Map will remove entries when the value in the map has been cleaned from garbage collection

Author:

Bill Burke, Adrian Brock, Ales Justin

See Also:

• JBoss Common Core source code for origins of this class

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static interface	WeakValueHashMap.ValueRef<K,V>

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

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

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

Map.Entry<K,V>

Constructor Summary

Constructors

Constructor	Description
WeakValueHashMap()	Constructs a new, empty WeakValueHashMap with the default initial capacity and the default load factor, which is 0.75.
WeakValueHashMap(int initialCapacity)	Constructs a new, empty WeakValueHashMap with the given initial capacity and the default load factor, which is 0.75.
WeakValueHashMap(int initialCapacity, float loadFactor)	Constructs a new, empty WeakValueHashMap with the given initial capacity and the given load factor.
WeakValueHashMap(Map<K,V> t)	Constructs a new WeakValueHashMap with the same mappings as the specified Map.

Method Summary

Modifier and Type	Method	Description
void	clear()
boolean	containsKey(Object key)
protected Map<K,WeakValueHashMap.ValueRef<K,V>>	createMap()	Create map.
Set<Map.Entry<K,V>>	entrySet()
V	get(Object key)
V	put(K key, V value)
V	remove(Object key)
int	size()
String	toString()

Methods inherited from class java.util.AbstractMap

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

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Map

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

Constructor Details

WeakValueHashMap

public WeakValueHashMap(int initialCapacity,
 float loadFactor)

Constructs a new, empty WeakValueHashMap with the given initial capacity and the given load factor.

Parameters:

initialCapacity - The initial capacity of the WeakValueHashMap

loadFactor - The load factor of the WeakValueHashMap

Throws:

IllegalArgumentException - If the initial capacity is less than zero, or if the load factor is nonpositive

WeakValueHashMap

public WeakValueHashMap(int initialCapacity)

Constructs a new, empty WeakValueHashMap with the given initial capacity and the default load factor, which is 0.75.

Parameters:

initialCapacity - The initial capacity of the WeakValueHashMap

Throws:

IllegalArgumentException - If the initial capacity is less than zero

WeakValueHashMap

public WeakValueHashMap()

Constructs a new, empty WeakValueHashMap with the default initial capacity and the default load factor, which is 0.75.

WeakValueHashMap

public WeakValueHashMap(Map<K,V> t)

Constructs a new WeakValueHashMap with the same mappings as the specified Map. The WeakValueHashMap is created with an initial capacity of twice the number of mappings in the specified map or 11 (whichever is greater), and a default load factor, which is 0.75.

Parameters:

t - the map whose mappings are to be placed in this map.

Since:

1.3

Method Details

createMap

protected Map<K,WeakValueHashMap.ValueRef<K,V>> createMap()

Create map.

Returns:

new map instance

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>

get

public V get(Object key)

Specified by:

get in interface Map<K,V>

Overrides:

get in class AbstractMap<K,V>

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>

entrySet

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

Specified by:

entrySet in interface Map<K,V>

Specified by:

entrySet in class AbstractMap<K,V>

clear

public void clear()

Specified by:

clear in interface Map<K,V>

Overrides:

clear in class AbstractMap<K,V>

toString

public String toString()

Overrides:

toString in class AbstractMap<K,V>