org.boon.collections

Class ConcurrentWeakHashMap<K,V>

java.lang.Object

java.util.AbstractMap<K,V>

org.boon.collections.ConcurrentWeakHashMap<K,V>

Type Parameters:

K - key

V - value

All Implemented Interfaces:

ConcurrentMap<K,V>, Map<K,V>

public class ConcurrentWeakHashMap<K,V>
extends AbstractMap<K,V>
implements ConcurrentMap<K,V>

I got a lot of ideas from concurrent java books. and looking at open source implementations of this This is written from scratch. It was heavily influenced by IntelliJ's ConcurrentWeakHashMap open source project. Theirs is better. Mine is good enough for boon's needs.

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
ConcurrentWeakHashMap()
ConcurrentWeakHashMap(int initialCapacity)
ConcurrentWeakHashMap(int initialCapacity, float loadFactor)
ConcurrentWeakHashMap(int initialCapacity, float loadFactor, int concurrencyLevel)

Method Summary

Methods

Modifier and Type	Method and Description
void	clear()
boolean	containsKey(Object key)
boolean	containsValue(Object value)
Set<Map.Entry<K,V>>	entrySet()
V	get(Object key)
boolean	isEmpty()
V	put(K key, V value)
void	putAll(Map<? extends K,? extends V> map)
V	putIfAbsent(K key, V value)
V	remove(Object key)
boolean	remove(Object key, Object value)
V	replace(K key, V value)
boolean	replace(K key, V oldValue, V newValue)
int	size()
Collection<V>	values()

Methods inherited from class java.util.AbstractMap

clone, equals, hashCode, keySet, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Map

equals, hashCode, keySet

Constructor Detail

ConcurrentWeakHashMap

public ConcurrentWeakHashMap(int initialCapacity,
                     float loadFactor,
                     int concurrencyLevel)

ConcurrentWeakHashMap

public ConcurrentWeakHashMap(int initialCapacity,
                     float loadFactor)

ConcurrentWeakHashMap

public ConcurrentWeakHashMap(int initialCapacity)

ConcurrentWeakHashMap

public ConcurrentWeakHashMap()

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>

putAll

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

Specified by:

putAll in interface Map<K,V>

Overrides:

putAll in class AbstractMap<K,V>

size

public int size()

Specified by:

size in interface Map<K,V>

Overrides:

size in class AbstractMap<K,V>

clear

public void clear()

Specified by:

clear in interface Map<K,V>

Overrides:

clear in class AbstractMap<K,V>

values

public Collection<V> values()

Specified by:

values in interface Map<K,V>

Overrides:

values in class AbstractMap<K,V>

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface Map<K,V>

Overrides:

isEmpty 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>

containsValue

public boolean containsValue(Object value)

Specified by:

containsValue in interface Map<K,V>

Overrides:

containsValue 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>

putIfAbsent

public V putIfAbsent(K key,
            V value)

Specified by:

putIfAbsent in interface ConcurrentMap<K,V>

remove

public boolean remove(Object key,
             Object value)

Specified by:

remove in interface ConcurrentMap<K,V>

replace

public boolean replace(K key,
              V oldValue,
              V newValue)

Specified by:

replace in interface ConcurrentMap<K,V>

replace

public V replace(K key,
        V value)

Specified by:

replace in interface ConcurrentMap<K,V>