Package com.intellij.util.containers

Class ConcurrentFactoryMap<K,V>

java.lang.Object

com.intellij.util.containers.ConcurrentFactoryMap<K,V>

All Implemented Interfaces:

java.util.concurrent.ConcurrentMap<K,V>, java.util.Map<K,V>

public abstract class ConcurrentFactoryMap<K,V>
extends java.lang.Object
implements java.util.concurrent.ConcurrentMap<K,V>

ConcurrentMap which computes the value associated with the key (via create(Object) method) on first get(Object) access. This map is THREAD SAFE. It's guaranteed that two get(Object) method calls with the same key will return the same value (i.e. the created value stored atomically). For the not thread-safe (but possibly faster and more memory-efficient) alternative please use FactoryMap instead.

Nested Class Summary

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

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

Method Summary

Modifier and Type	Method and Description
void	clear()
boolean	containsKey(java.lang.Object key)
boolean	containsValue(java.lang.Object value)
static <K,V> java.util.concurrent.ConcurrentMap<K,V>	create(Function<? super K,? extends V> computeValue, java.util.function.Supplier<? extends java.util.concurrent.ConcurrentMap<K,V>> mapCreator)
protected abstract V	create(K key)
protected java.util.concurrent.ConcurrentMap<K,V>	createMap()
static <T,V> java.util.concurrent.ConcurrentMap<T,V>	createMap(Function<? super T,? extends V> computeValue)
static <T,V> java.util.concurrent.ConcurrentMap<T,V>	createWeakMap(Function<? super T,? extends V> compute)
java.util.Set<java.util.Map.Entry<K,V>>	entrySet()
V	get(java.lang.Object key)
boolean	isEmpty()
java.util.Set<K>	keySet()
V	put(K key, V value)
void	putAll(java.util.Map<? extends K,? extends V> m)
V	putIfAbsent(K key, V value)
V	remove(java.lang.Object key)
boolean	remove(java.lang.Object key, java.lang.Object value)
boolean	removeValue(java.lang.Object value)
V	replace(K key, V value)
boolean	replace(K key, V oldValue, V newValue)
int	size()
java.lang.String	toString()
java.util.Collection<V>	values()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.util.concurrent.ConcurrentMap

compute, computeIfAbsent, computeIfPresent, forEach, getOrDefault, merge, replaceAll

Methods inherited from interface java.util.Map

entry, equals, hashCode, of, of, of, of, of, of, of, of, of, of, of, ofEntries

Method Detail

create

protected abstract V create(K key)

get

public V get(java.lang.Object key)

Specified by:

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

containsKey

public final boolean containsKey(java.lang.Object key)

Specified by:

containsKey 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>

remove

public V remove(java.lang.Object key)

Specified by:

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

keySet

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

Specified by:

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

removeValue

public boolean removeValue(java.lang.Object value)

clear

public void clear()

Specified by:

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

size

public int size()

Specified by:

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

isEmpty

public boolean isEmpty()

Specified by:

isEmpty 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>

putAll

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

Specified by:

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

values

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

Specified by:

values 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>

createMap

protected java.util.concurrent.ConcurrentMap<K,V> createMap()

putIfAbsent

public V putIfAbsent(K key,
                     V value)

Specified by:

putIfAbsent in interface java.util.concurrent.ConcurrentMap<K,V>

Specified by:

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

remove

public boolean remove(java.lang.Object key,
                      java.lang.Object value)

Specified by:

remove in interface java.util.concurrent.ConcurrentMap<K,V>

Specified by:

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

replace

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

Specified by:

replace in interface java.util.concurrent.ConcurrentMap<K,V>

Specified by:

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

replace

public V replace(K key,
                 V value)

Specified by:

replace in interface java.util.concurrent.ConcurrentMap<K,V>

Specified by:

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

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

createMap

public static <T,V> java.util.concurrent.ConcurrentMap<T,V> createMap(Function<? super T,? extends V> computeValue)

create

public static <K,V> java.util.concurrent.ConcurrentMap<K,V> create(Function<? super K,? extends V> computeValue,
                                                                   java.util.function.Supplier<? extends java.util.concurrent.ConcurrentMap<K,V>> mapCreator)

createWeakMap

public static <T,V> java.util.concurrent.ConcurrentMap<T,V> createWeakMap(Function<? super T,? extends V> compute)

Returns:

Concurrent factory map with weak keys, strong values