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:

java.util.Map<K,V>

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

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

Field Summary

Fields

Modifier and Type	Field and Description
protected java.util.Map<K,V>	forwardMap
protected java.util.Map<V,K>	reverseMap

Constructor Summary

Constructors

Modifier	Constructor and Description
	ConcurrentBiMap()
protected	ConcurrentBiMap(java.util.Map<K,V> forwardMap, java.util.Map<V,K> reverseMap)

Method Summary

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

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

Field Detail

forwardMap

protected final java.util.Map<K,V> forwardMap

reverseMap

protected final java.util.Map<V,K> reverseMap

Constructor Detail

ConcurrentBiMap

public ConcurrentBiMap()

ConcurrentBiMap

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

Method Detail

inverse

public java.util.Map<V,K> inverse()

clear

public void clear()

Specified by:

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

containsKey

public boolean containsKey(java.lang.Object key)

Specified by:

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

containsValue

public boolean containsValue(java.lang.Object value)

Specified by:

containsValue 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>

get

public V get(java.lang.Object key)

Specified by:

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

isEmpty

public boolean isEmpty()

Specified by:

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

keySet

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

Specified by:

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

put

public V put(K key,
             V value)

Specified by:

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

putAll

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

Specified by:

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

remove

public V remove(java.lang.Object key)

Specified by:

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

size

public int size()

Specified by:

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

values

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

Specified by:

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