com.vaadin.util
Class WeakValueMap<K,V>

java.lang.Object
  com.vaadin.util.WeakValueMap<K,V>

All Implemented Interfaces:

java.util.Map<K,V>

public class WeakValueMap<K,V>
extends java.lang.Object
implements java.util.Map<K,V>

A Map holding weak references to its values. It is internally backed by a normal HashMap and all values are stored as WeakReferences. Garbage collected entries are removed when touched.

Note this class is not serializable.

Since:

7.1.4

Author:

Vaadin Ltd

Nested Class Summary

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

java.util.Map.Entry<K,V>

Constructor Summary

WeakValueMap()
Constructs a new WeakValueMap, where all values are stored as weak references.

Method Summary

void	clear()
boolean	containsKey(java.lang.Object o)
boolean	containsValue(java.lang.Object o)
java.util.Set<java.util.Map.Entry<K,V>>	entrySet()
V	get(java.lang.Object o)
boolean	isEmpty()
java.util.Set<K>	keySet()
V	put(K key, V value)
void	putAll(java.util.Map<? extends K,? extends V> map)
V	remove(java.lang.Object o)
int	size()
java.util.Collection<V>	values()

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

equals, hashCode

Constructor Detail

WeakValueMap

public WeakValueMap()

Constructs a new WeakValueMap, where all values are stored as weak references.

Method Detail

put

public V put(K key,
             V value)

Specified by:

put in interface java.util.Map<K,V>

remove

public V remove(java.lang.Object o)

Specified by:

remove in interface java.util.Map<K,V>

putAll

public void putAll(java.util.Map<? extends K,? extends V> map)

Specified by:

putAll in interface java.util.Map<K,V>

clear

public void clear()

Specified by:

clear in interface java.util.Map<K,V>

keySet

public java.util.Set<K> keySet()

Specified by:

keySet in interface java.util.Map<K,V>

get

public V get(java.lang.Object o)

Specified by:

get in interface java.util.Map<K,V>

size

public int size()

Specified by:

size in interface java.util.Map<K,V>

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface java.util.Map<K,V>

containsKey

public boolean containsKey(java.lang.Object o)

Specified by:

containsKey in interface java.util.Map<K,V>

containsValue

public boolean containsValue(java.lang.Object o)

Specified by:

containsValue in interface java.util.Map<K,V>

values

public java.util.Collection<V> values()

Specified by:

values in interface java.util.Map<K,V>

entrySet

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

Specified by:

entrySet in interface java.util.Map<K,V>