cn.hutool.core.map

Class MapWrapper<K,V>

java.lang.Object

cn.hutool.core.map.MapWrapper<K,V>

Type Parameters:

K - 键类型

V - 值类型

All Implemented Interfaces:

Serializable, Cloneable, Iterable<Map.Entry<K,V>>, Map<K,V>

Direct Known Subclasses:

AbsCollValueMap, BiMap, JSONObject, TolerantMap, TransMap

public class MapWrapper<K,V>
extends Object
implements Map<K,V>, Iterable<Map.Entry<K,V>>, Serializable, Cloneable

Map包装类，通过包装一个已有Map实现特定功能。例如自定义Key的规则或Value规则

Since:

4.3.3

Author:

looly

See Also:

Serialized Form

Nested Class Summary

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

Map.Entry<K,V>

Field Summary

Fields

Modifier and Type	Field and Description
protected static int	DEFAULT_INITIAL_CAPACITY 默认初始大小
protected static float	DEFAULT_LOAD_FACTOR 默认增长因子

Constructor Summary

Constructors

Constructor and Description
MapWrapper(Map<K,V> raw) 构造
MapWrapper(Supplier<Map<K,V>> mapFactory) 构造 通过传入一个Map从而确定Map的类型，子类需创建一个空的Map，而非传入一个已有Map，否则值可能会被修改

Method Summary

Modifier and Type	Method and Description
void	clear()
MapWrapper<K,V>	clone()
V	compute(K key, BiFunction<? super K,? super V,? extends V> remappingFunction)
V	computeIfAbsent(K key, Function<? super K,? extends V> mappingFunction)
V	computeIfPresent(K key, BiFunction<? super K,? super V,? extends V> remappingFunction)
boolean	containsKey(Object key)
boolean	containsValue(Object value)
Set<Map.Entry<K,V>>	entrySet()
boolean	equals(Object o)
void	forEach(BiConsumer<? super K,? super V> action)
V	get(Object key)
V	getOrDefault(Object key, V defaultValue)
Map<K,V>	getRaw() 获取原始的Map
int	hashCode()
boolean	isEmpty()
Iterator<Map.Entry<K,V>>	iterator()
Set<K>	keySet()
V	merge(K key, V value, BiFunction<? super V,? super V,? extends V> remappingFunction)
V	put(K key, V value)
void	putAll(Map<? extends K,? extends V> m)
V	putIfAbsent(K key, V value)
V	remove(Object key)
boolean	remove(Object key, Object value)
V	replace(K key, V value)
boolean	replace(K key, V oldValue, V newValue)
void	replaceAll(BiFunction<? super K,? super V,? extends V> function)
int	size()
String	toString()
Collection<V>	values()

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Field Detail

DEFAULT_LOAD_FACTOR

protected static final float DEFAULT_LOAD_FACTOR

默认增长因子

See Also:

Constant Field Values

DEFAULT_INITIAL_CAPACITY

protected static final int DEFAULT_INITIAL_CAPACITY

默认初始大小

See Also:

Constant Field Values

Constructor Detail

MapWrapper

public MapWrapper(Supplier<Map<K,V>> mapFactory)

构造
通过传入一个Map从而确定Map的类型，子类需创建一个空的Map，而非传入一个已有Map，否则值可能会被修改

Parameters:

mapFactory - 空Map创建工厂

Since:

5.8.0

MapWrapper

public MapWrapper(Map<K,V> raw)

构造

Parameters:

raw - 被包装的Map

Method Detail

getRaw

public Map<K,V> getRaw()

获取原始的Map

Returns:

Map

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>

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>

values

public Collection<V> values()

Specified by:

values in interface Map<K,V>

keySet

public Set<K> keySet()

Specified by:

keySet in interface Map<K,V>

entrySet

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

Specified by:

entrySet in interface Map<K,V>

iterator

public Iterator<Map.Entry<K,V>> iterator()

Specified by:

iterator in interface Iterable<Map.Entry<K,V>>

equals

public boolean equals(Object o)

Specified by:

equals in interface Map<K,V>

Overrides:

equals in class Object

hashCode

public int hashCode()

Specified by:

hashCode in interface Map<K,V>

Overrides:

hashCode in class Object

toString

public String toString()

Overrides:

toString in class Object

forEach

public void forEach(BiConsumer<? super K,? super V> action)

Specified by:

forEach in interface Map<K,V>

replaceAll

public void replaceAll(BiFunction<? super K,? super V,? extends V> function)

Specified by:

replaceAll in interface Map<K,V>

putIfAbsent

public V putIfAbsent(K key,
                     V value)

Specified by:

putIfAbsent in interface Map<K,V>

remove

public boolean remove(Object key,
                      Object value)

Specified by:

remove in interface Map<K,V>

replace

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

Specified by:

replace in interface Map<K,V>

replace

public V replace(K key,
                 V value)

Specified by:

replace in interface Map<K,V>

computeIfAbsent

public V computeIfAbsent(K key,
                         Function<? super K,? extends V> mappingFunction)

Specified by:

computeIfAbsent in interface Map<K,V>

getOrDefault

public V getOrDefault(Object key,
                      V defaultValue)

Specified by:

getOrDefault in interface Map<K,V>

computeIfPresent

public V computeIfPresent(K key,
                          BiFunction<? super K,? super V,? extends V> remappingFunction)

Specified by:

computeIfPresent in interface Map<K,V>

compute

public V compute(K key,
                 BiFunction<? super K,? super V,? extends V> remappingFunction)

Specified by:

compute in interface Map<K,V>

merge

public V merge(K key,
               V value,
               BiFunction<? super V,? super V,? extends V> remappingFunction)

Specified by:

merge in interface Map<K,V>

clone

public MapWrapper<K,V> clone()
                      throws CloneNotSupportedException

Overrides:

clone in class Object

Throws:

CloneNotSupportedException