Package org.web3d.util

Class WeakValueHashMap

java.lang.Object

org.web3d.util.WeakValueHashMap

All Implemented Interfaces:

Map<Object,org.web3d.util.KeyedWeakReference>

public class WeakValueHashMap
extends Object
implements Map<Object,org.web3d.util.KeyedWeakReference>

An extension of HashMap which stored weak references to the values in the hash map.

Like it says in the documentation for WeakHashMap, this class breaks several immutability assumptions that are assumed for HashMap, since values will be disappearing at random.

Version:

$Revision: 1.2 $

Author:

Brad Vender

Nested Class Summary

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

Map.Entry<K,V>

Constructor Summary

Constructors

Constructor	Description
WeakValueHashMap()	Construct a new map of default size
WeakValueHashMap(int size)	Construct a new map with specified starting size

Method Summary

Modifier and Type	Method	Description
void	clear()
boolean	containsKey(Object key)
boolean	containsValue(Object value)
Set<Map.Entry<Object,org.web3d.util.KeyedWeakReference>>	entrySet()
boolean	equals(Object o)
protected void	flushEmptyReferences()	Check for and remove references from the map which have become cleared.
org.web3d.util.KeyedWeakReference	get(Object key)
int	hashCode()
boolean	isEmpty()
Set<Object>	keySet()
org.web3d.util.KeyedWeakReference	put(Object key, org.web3d.util.KeyedWeakReference value)
void	putAll(Map t)
org.web3d.util.KeyedWeakReference	remove(Object key)
int	size()
Collection<org.web3d.util.KeyedWeakReference>	values()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, toString, 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()

Construct a new map of default size

WeakValueHashMap

public WeakValueHashMap(int size)

Construct a new map with specified starting size

Parameters:

size -

Method Details

clear

public void clear()

Specified by:

clear in interface Map<Object,org.web3d.util.KeyedWeakReference>

See Also:

• Map.clear()

containsKey

public boolean containsKey(Object key)

Specified by:

containsKey in interface Map<Object,org.web3d.util.KeyedWeakReference>

See Also:

• Map.containsKey(java.lang.Object)

containsValue

public boolean containsValue(Object value)

Specified by:

containsValue in interface Map<Object,org.web3d.util.KeyedWeakReference>

See Also:

• Map.containsValue(java.lang.Object)

entrySet

public Set<Map.Entry<Object,org.web3d.util.KeyedWeakReference>> entrySet()

Specified by:

entrySet in interface Map<Object,org.web3d.util.KeyedWeakReference>

equals

public boolean equals(Object o)

Specified by:

equals in interface Map<Object,org.web3d.util.KeyedWeakReference>

Overrides:

equals in class Object

flushEmptyReferences

protected void flushEmptyReferences()

Check for and remove references from the map which have become cleared.

get

public org.web3d.util.KeyedWeakReference get(Object key)

Specified by:

get in interface Map<Object,org.web3d.util.KeyedWeakReference>

hashCode

public int hashCode()

Specified by:

hashCode in interface Map<Object,org.web3d.util.KeyedWeakReference>

Overrides:

hashCode in class Object

See Also:

• Object.hashCode()

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface Map<Object,org.web3d.util.KeyedWeakReference>

See Also:

• Map.isEmpty()

keySet

public Set<Object> keySet()

Specified by:

keySet in interface Map<Object,org.web3d.util.KeyedWeakReference>

See Also:

• Map.keySet()

put

public org.web3d.util.KeyedWeakReference put(Object key,
 org.web3d.util.KeyedWeakReference value)

Specified by:

put in interface Map<Object,org.web3d.util.KeyedWeakReference>

putAll

public void putAll(Map t)

Specified by:

putAll in interface Map<Object,org.web3d.util.KeyedWeakReference>

remove

public org.web3d.util.KeyedWeakReference remove(Object key)

Specified by:

remove in interface Map<Object,org.web3d.util.KeyedWeakReference>

See Also:

• Map.remove(java.lang.Object)

size

public int size()

Specified by:

size in interface Map<Object,org.web3d.util.KeyedWeakReference>

See Also:

• Map.size()

values

public Collection<org.web3d.util.KeyedWeakReference> values()

Specified by:

values in interface Map<Object,org.web3d.util.KeyedWeakReference>