Package net.datafaker.internal.helper

Class CopyOnWriteMap<K,V>

java.lang.Object

net.datafaker.internal.helper.CopyOnWriteMap<K,V>

All Implemented Interfaces:

Map<K,V>

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

This is a Copy On Write map. The main idea behind this is that there is lots of static info per provider to make the providers operate. At the same time there is no need to load all the info at the start since we don't know which providers will be used and loading for all takes time. For that reason it is loaded on request and stored in these Copy On Write maps. Since it is loaded only once per provider and after that is only read then it should be ok and moreover it will allow to have non-blocking reads. In case for whatever reason there is a need to change this class, please double-check jmh report before and after e.g. mvn clean package exec:exec -Dbenchmarks="DatafakerSimpleMethods" -Ddatafaker.version=2.2.3-SNAPSHOT

Nested Class Summary

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

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

Constructor Summary

Constructors

Constructor	Description
CopyOnWriteMap(Supplier<Map<K,V>> mapSupplier)

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)
V	getOrDefault(Object key, V defaultValue)
boolean	isEmpty()
Set<K>	keySet()
V	put(K key, V value)
void	putAll(Map<? extends K,? extends V> m)
V	putIfAbsent(K key, V value)
V	remove(Object key)
int	size()
String	toString()
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.Map

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

Constructor Details

CopyOnWriteMap

public CopyOnWriteMap(Supplier<Map<K,V>> mapSupplier)

Method Details

size

public int size()

Specified by:

size in interface Map<K,V>

isEmpty

public boolean isEmpty()

Specified by:

isEmpty 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>

get

public V get(Object key)

Specified by:

get in interface Map<K,V>

putIfAbsent

public V putIfAbsent(K key,
 V value)

Specified by:

putIfAbsent in interface Map<K,V>

put

public V put(K key,
 V value)

Specified by:

put in interface Map<K,V>

remove

public V remove(Object key)

Specified by:

remove in interface Map<K,V>

putAll

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

Specified by:

putAll in interface Map<K,V>

clear

public void clear()

Specified by:

clear in interface Map<K,V>

keySet

public Set<K> keySet()

Specified by:

keySet in interface Map<K,V>

values

public Collection<V> values()

Specified by:

values in interface Map<K,V>

entrySet

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

Specified by:

entrySet in interface Map<K,V>

toString

public String toString()

Overrides:

toString in class Object

getOrDefault

public V getOrDefault(Object key,
 V defaultValue)

Specified by:

getOrDefault in interface Map<K,V>