cn.hutool.core.map

Class TransMap<K,V>

java.lang.Object

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

cn.hutool.core.map.TransMap<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:

CustomKeyMap, FuncMap

public abstract class TransMap<K,V>
extends MapWrapper<K,V>

自定义键和值转换的的Map
继承此类后，通过实现customKey(Object)和customValue(Object)，按照给定规则加入到map或获取值。

Since:

5.8.0

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 inherited from class cn.hutool.core.map.MapWrapper

DEFAULT_INITIAL_CAPACITY, DEFAULT_LOAD_FACTOR

Constructor Summary

Constructors

Constructor and Description
TransMap(Map<K,V> emptyMap) 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
TransMap(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
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)
protected abstract K	customKey(Object key) 自定义键
protected abstract V	customValue(Object value) 自定义值
V	get(Object key)
V	getOrDefault(Object key, V defaultValue)
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)

Methods inherited from class cn.hutool.core.map.MapWrapper

clear, clone, containsValue, entrySet, equals, forEach, getRaw, hashCode, isEmpty, iterator, keySet, replaceAll, size, toString, values

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Constructor Detail

TransMap

public TransMap(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

TransMap

public TransMap(Map<K,V> emptyMap)

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:

emptyMap - Map 被包装的Map，必须为空Map，否则自定义key会无效

Since:

3.1.2

Method Detail

get

public V get(Object key)

Specified by:

get in interface Map<K,V>

Overrides:

get in class MapWrapper<K,V>

put

public V put(K key,
             V value)

Specified by:

put in interface Map<K,V>

Overrides:

put in class MapWrapper<K,V>

putAll

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

Specified by:

putAll in interface Map<K,V>

Overrides:

putAll in class MapWrapper<K,V>

containsKey

public boolean containsKey(Object key)

Specified by:

containsKey in interface Map<K,V>

Overrides:

containsKey in class MapWrapper<K,V>

remove

public V remove(Object key)

Specified by:

remove in interface Map<K,V>

Overrides:

remove in class MapWrapper<K,V>

remove

public boolean remove(Object key,
                      Object value)

Specified by:

remove in interface Map<K,V>

Overrides:

remove in class MapWrapper<K,V>

replace

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

Specified by:

replace in interface Map<K,V>

Overrides:

replace in class MapWrapper<K,V>

replace

public V replace(K key,
                 V value)

Specified by:

replace in interface Map<K,V>

Overrides:

replace in class MapWrapper<K,V>

getOrDefault

public V getOrDefault(Object key,
                      V defaultValue)

Specified by:

getOrDefault in interface Map<K,V>

Overrides:

getOrDefault in class MapWrapper<K,V>

computeIfPresent

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

Specified by:

computeIfPresent in interface Map<K,V>

Overrides:

computeIfPresent in class MapWrapper<K,V>

compute

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

Specified by:

compute in interface Map<K,V>

Overrides:

compute in class MapWrapper<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>

Overrides:

merge in class MapWrapper<K,V>

putIfAbsent

public V putIfAbsent(K key,
                     V value)

Specified by:

putIfAbsent in interface Map<K,V>

Overrides:

putIfAbsent in class MapWrapper<K,V>

computeIfAbsent

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

Specified by:

computeIfAbsent in interface Map<K,V>

Overrides:

computeIfAbsent in class MapWrapper<K,V>

customKey

protected abstract K customKey(Object key)

自定义键

Parameters:

key - KEY

Returns:

自定义KEY

customValue

protected abstract V customValue(Object value)

自定义值

Parameters:

value - 值

Returns:

自定义值