de.vc.util

Class FlyweightMap<K,V>

java.lang.Object

de.vc.util.FlyweightMap<K,V>

All Implemented Interfaces:

java.lang.Cloneable, java.util.Map<K,V>

public class FlyweightMap<K,V>
extends java.lang.Object
implements java.util.Map<K,V>, java.lang.Cloneable

A flyweight map shares its entries with other maps having equal entries. Flyweight maps can be used like a normal map, but you should avoid manipulating the entry set directly that comes with entrySet().

Nested Class Summary

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

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

Constructor Summary

Constructors

Constructor and Description
FlyweightMap()
FlyweightMap(java.util.Map<K,V> initial)

Method Summary

Modifier and Type	Method and Description
void	clear()
static void	clearSharedValues()
java.lang.Object	clone()
boolean	containsKey(java.lang.Object key)
boolean	containsValue(java.lang.Object value)
static int	countSharedEntries()
static int	countSharedEntriesSets()
java.util.Set<java.util.Map.Entry<K,V>>	entrySet()
boolean	equals(java.lang.Object o)
V	get(java.lang.Object key)
int	hashCode()
boolean	isEmpty()
java.util.Set<K>	keySet()
V	put(K key, V value)
void	putAll(java.util.Map<? extends K,? extends V> putEntries)
V	remove(java.lang.Object key)
int	size()
java.util.Collection<V>	values()

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Map

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

Constructor Detail

FlyweightMap

public FlyweightMap()

FlyweightMap

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

Method Detail

countSharedEntriesSets

public static int countSharedEntriesSets()

countSharedEntries

public static int countSharedEntries()

clearSharedValues

public static void clearSharedValues()

clone

public java.lang.Object clone()
                       throws java.lang.CloneNotSupportedException

Overrides:

clone in class java.lang.Object

Throws:

java.lang.CloneNotSupportedException

hashCode

public int hashCode()

Specified by:

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

Overrides:

hashCode in class java.lang.Object

size

public int size()

Specified by:

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

clear

public void clear()

Specified by:

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

isEmpty

public boolean isEmpty()

Specified by:

isEmpty 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>

equals

public boolean equals(java.lang.Object o)

Specified by:

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

Overrides:

equals in class java.lang.Object

values

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

Specified by:

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

putAll

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

Specified by:

putAll 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>

keySet

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

Specified by:

keySet 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>

remove

public V remove(java.lang.Object key)

Specified by:

remove 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>