Package org.apache.cassandra.utils

Class ConcurrentBiMap<K,V>

java.lang.Object

org.apache.cassandra.utils.ConcurrentBiMap<K,V>

Type Parameters:

K -

V -

All Implemented Interfaces:

Map<K,V>

public class ConcurrentBiMap<K,V>
extends Object
implements Map<K,V>

A variant of BiMap that permits concurrent access, and expects uniqueness of values in both domain and range. We synchronize on _modifications only_, and use ConcurrentHashMap so that readers can lookup safely. This does mean there could be races to lookup the inverse, but we aren't too worried about that.

Nested Class Summary

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

Map.Entry<K extends Object,V extends Object>

Field Summary

Fields

Modifier and Type	Field	Description
protected final Map<K,V>	forwardMap
protected final Map<V,K>	reverseMap

Constructor Summary

Constructors

Modifier	Constructor	Description
	ConcurrentBiMap()
protected	ConcurrentBiMap(Map<K,V> forwardMap, Map<V,K> reverseMap)

Method Summary

Modifier and Type	Method	Description
void	clear()
boolean	containsKey(Object key)
boolean	containsValue(Object value)
Set<Map.Entry<K,V>>	entrySet()
V	get(Object key)
Map<V,K>	inverse()
boolean	isEmpty()
Set<K>	keySet()
V	put(K key, V value)
void	putAll(Map<? extends K,? extends V> m)
V	remove(Object key)
int	size()
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

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

Field Details

forwardMap

protected final Map<K,V> forwardMap

reverseMap

protected final Map<V,K> reverseMap

Constructor Details

ConcurrentBiMap

public ConcurrentBiMap()

ConcurrentBiMap

protected ConcurrentBiMap(Map<K,V> forwardMap,
 Map<V,K> reverseMap)

Method Details

inverse

public Map<V,K> inverse()

clear

public void clear()

Specified by:

clear in interface Map<K,V>

containsKey

public boolean containsKey(Object key)

Specified by:

containsKey in interface Map<K,V>

containsValue

public boolean containsValue(Object value)

Specified by:

containsValue in interface Map<K,V>

entrySet

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

Specified by:

entrySet in interface Map<K,V>

get

public V get(Object key)

Specified by:

get in interface Map<K,V>

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface Map<K,V>

keySet

public Set<K> keySet()

Specified by:

keySet in interface Map<K,V>

put

public V put(K key,
 V value)

Specified by:

put in interface Map<K,V>

putAll

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

Specified by:

putAll in interface Map<K,V>

remove

public V remove(Object key)

Specified by:

remove in interface Map<K,V>

size

public int size()

Specified by:

size in interface Map<K,V>

values

public Collection<V> values()

Specified by:

values in interface Map<K,V>