org.hypergraphdb.util

Class SoftHashMap<K,V>

java.lang.Object

java.util.AbstractMap<K,V>

org.hypergraphdb.util.SoftHashMap<K,V>

Type Parameters:

K - The type of the map key.

V - The type of the map value.

All Implemented Interfaces:

Map<K,V>

public class SoftHashMap<K,V>
extends AbstractMap<K,V>

This is similar to the standard WeakHashMap, but it uses SoftReferences for the map's values instead of WeakReferences for the maps keys. Thus, an entry is removed from the map when the JVM is low in memory and when the entry's value is softly reachable.

Author:

Borislav Iordanov

Nested Class Summary

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 and Description
SoftHashMap()
SoftHashMap(int initialCapacity)
SoftHashMap(int initialCapacity, float loadFactor)
SoftHashMap(Map<? extends K,? extends V> m)

Method Summary

Methods

Modifier and Type	Method and Description
void	clear()
Set<Map.Entry<K,V>>	entrySet()
V	get(Object key)
V	put(K key, V value)
V	remove(Object key)
int	size()

Methods inherited from class java.util.AbstractMap

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

Methods inherited from class java.lang.Object

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

Constructor Detail

SoftHashMap

public SoftHashMap()

SoftHashMap

public SoftHashMap(int initialCapacity)

SoftHashMap

public SoftHashMap(int initialCapacity,
           float loadFactor)

SoftHashMap

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

Method Detail

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>

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>

entrySet

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

Specified by:

entrySet in interface Map<K,V>

Specified by:

entrySet in class AbstractMap<K,V>