程序包 cn.taketoday.util

类 LinkedCaseInsensitiveMap<V>

java.lang.Object

cn.taketoday.util.LinkedCaseInsensitiveMap<V>

类型参数:

V - the value type

所有已实现的接口:

Serializable, Cloneable, Map<String,V>

public class LinkedCaseInsensitiveMap<V>
extends Object
implements Map<String,V>, Serializable, Cloneable

LinkedHashMap variant that stores String keys in a case-insensitive manner, for example for key-based access in a results table.

Preserves the original order as well as the original casing of keys, while allowing for contains, get and remove calls with any case of key.

Does not support null keys.

从以下版本开始:

2019-12-08 20:20

作者:

Juergen Hoeller, Phillip Webb, Harry Yang

另请参阅:

• 序列化表格

嵌套类概要

嵌套类

修饰符和类型	类	说明
private class	LinkedCaseInsensitiveMap.EntryIterator<T>
private class	LinkedCaseInsensitiveMap.EntrySet
private class	LinkedCaseInsensitiveMap.EntrySetIterator
private class	LinkedCaseInsensitiveMap.KeySet
private class	LinkedCaseInsensitiveMap.KeySetIterator
private class	LinkedCaseInsensitiveMap.Values
private class	LinkedCaseInsensitiveMap.ValuesIterator

从接口继承的嵌套类/接口 java.util.Map

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

字段概要

字段

修饰符和类型	字段	说明
private final HashMap<String,String>	caseInsensitiveKeys
private Set<Map.Entry<String,V>>	entrySet
private Set<String>	keySet
private final Locale	locale
private static final long	serialVersionUID
private final LinkedHashMap<String,V>	targetMap
private Collection<V>	values

构造器概要

构造器

限定符	构造器	说明
	LinkedCaseInsensitiveMap()	Create a new LinkedCaseInsensitiveMap that stores case-insensitive keys according to the default Locale (by default in lower case).
	LinkedCaseInsensitiveMap(int expectedSize)	Create a new LinkedCaseInsensitiveMap that wraps a LinkedHashMap with an initial capacity that can accommodate the specified number of elements without any immediate resize/rehash operations to be expected, storing case-insensitive keys according to the default Locale (in lower case).
	LinkedCaseInsensitiveMap(int expectedSize, Locale locale)	Create a new LinkedCaseInsensitiveMap that wraps a LinkedHashMap with an initial capacity that can accommodate the specified number of elements without any immediate resize/rehash operations to be expected, storing case-insensitive keys according to the given Locale (in lower case).
private	LinkedCaseInsensitiveMap(LinkedCaseInsensitiveMap<V> other)	Copy constructor.
	LinkedCaseInsensitiveMap(Locale locale)	Create a new LinkedCaseInsensitiveMap that stores case-insensitive keys according to the given Locale (in lower case).

方法概要

修饰符和类型	方法	说明
void	clear()
LinkedCaseInsensitiveMap<V>	clone()
V	computeIfAbsent(String key, Function<? super String,? extends V> mappingFunction)
boolean	containsKey(Object key)
boolean	containsValue(Object value)
protected String	convertKey(String key)	Convert the given key to a case-insensitive key.
Set<Map.Entry<String,V>>	entrySet()
boolean	equals(Object other)
void	forEach(BiConsumer<? super String,? super V> action)
V	get(Object key)
Locale	getLocale()	Return the locale used by this LinkedCaseInsensitiveMap.
V	getOrDefault(Object key, V defaultValue)
int	hashCode()
boolean	isEmpty()
Set<String>	keySet()
V	put(String key, V value)
void	putAll(Map<? extends String,? extends V> map)
V	putIfAbsent(String key, V value)
V	remove(Object key)
private String	removeCaseInsensitiveKey(String key)
protected boolean	removeEldestEntry(Map.Entry<String,V> eldest)	Determine whether this map should remove the given eldest entry.
int	size()
String	toString()
Collection<V>	values()

从类继承的方法 java.lang.Object

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

从接口继承的方法 java.util.Map

compute, computeIfPresent, merge, remove, replace, replace, replaceAll

字段详细资料

serialVersionUID

private static final long serialVersionUID

另请参阅:

• 常量字段值

targetMap

private final LinkedHashMap<String,V> targetMap

caseInsensitiveKeys

private final HashMap<String,String> caseInsensitiveKeys

locale

private final Locale locale

keySet

@Nullable
private transient volatile Set<String> keySet

values

@Nullable
private transient volatile Collection<V> values

entrySet

@Nullable
private transient volatile Set<Map.Entry<String,V>> entrySet

构造器详细资料

LinkedCaseInsensitiveMap

public LinkedCaseInsensitiveMap()

Create a new LinkedCaseInsensitiveMap that stores case-insensitive keys according to the default Locale (by default in lower case).

另请参阅:

• convertKey(String)

LinkedCaseInsensitiveMap

public LinkedCaseInsensitiveMap(@Nullable
 Locale locale)

Create a new LinkedCaseInsensitiveMap that stores case-insensitive keys according to the given Locale (in lower case).

参数:

locale - the Locale to use for case-insensitive key conversion

另请参阅:

• convertKey(String)

LinkedCaseInsensitiveMap

public LinkedCaseInsensitiveMap(int expectedSize)

Create a new LinkedCaseInsensitiveMap that wraps a LinkedHashMap with an initial capacity that can accommodate the specified number of elements without any immediate resize/rehash operations to be expected, storing case-insensitive keys according to the default Locale (in lower case).

参数:

expectedSize - the expected number of elements (with a corresponding capacity to be derived so that no resize/rehash operations are needed)

另请参阅:

• CollectionUtils.newHashMap(int)
• convertKey(String)

LinkedCaseInsensitiveMap

public LinkedCaseInsensitiveMap(int expectedSize,
 @Nullable
 Locale locale)

Create a new LinkedCaseInsensitiveMap that wraps a LinkedHashMap with an initial capacity that can accommodate the specified number of elements without any immediate resize/rehash operations to be expected, storing case-insensitive keys according to the given Locale (in lower case).

参数:

expectedSize - the expected number of elements (with a corresponding capacity to be derived so that no resize/rehash operations are needed)

locale - the Locale to use for case-insensitive key conversion

另请参阅:

• CollectionUtils.newHashMap(int)
• convertKey(String)

LinkedCaseInsensitiveMap

private LinkedCaseInsensitiveMap(LinkedCaseInsensitiveMap<V> other)

Copy constructor.

方法详细资料

size

public int size()

指定者:

size 在接口中 Map<String,V>

isEmpty

public boolean isEmpty()

指定者:

isEmpty 在接口中 Map<String,V>

containsKey

public boolean containsKey(Object key)

指定者:

containsKey 在接口中 Map<String,V>

containsValue

public boolean containsValue(Object value)

指定者:

containsValue 在接口中 Map<String,V>

get

@Nullable
public V get(Object key)

指定者:

get 在接口中 Map<String,V>

getOrDefault

@Nullable
public V getOrDefault(Object key,
 V defaultValue)

指定者:

getOrDefault 在接口中 Map<String,V>

put

@Nullable
public V put(String key,
 @Nullable
 V value)

指定者:

put 在接口中 Map<String,V>

putAll

public void putAll(Map<? extends String,? extends V> map)

指定者:

putAll 在接口中 Map<String,V>

putIfAbsent

@Nullable
public V putIfAbsent(String key,
 @Nullable
 V value)

指定者:

putIfAbsent 在接口中 Map<String,V>

computeIfAbsent

@Nullable
public V computeIfAbsent(String key,
 Function<? super String,? extends V> mappingFunction)

指定者:

computeIfAbsent 在接口中 Map<String,V>

remove

@Nullable
public V remove(Object key)

指定者:

remove 在接口中 Map<String,V>

clear

public void clear()

指定者:

clear 在接口中 Map<String,V>

keySet

public Set<String> keySet()

指定者:

keySet 在接口中 Map<String,V>

values

public Collection<V> values()

指定者:

values 在接口中 Map<String,V>

entrySet

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

指定者:

entrySet 在接口中 Map<String,V>

forEach

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

指定者:

forEach 在接口中 Map<String,V>

clone

public LinkedCaseInsensitiveMap<V> clone()

覆盖:

clone 在类中 Object

equals

public boolean equals(@Nullable
 Object other)

指定者:

equals 在接口中 Map<String,V>

覆盖:

equals 在类中 Object

hashCode

public int hashCode()

指定者:

hashCode 在接口中 Map<String,V>

覆盖:

hashCode 在类中 Object

toString

public String toString()

覆盖:

toString 在类中 Object

getLocale

public Locale getLocale()

Return the locale used by this LinkedCaseInsensitiveMap. Used for case-insensitive key conversion.

另请参阅:

• LinkedCaseInsensitiveMap(Locale)
• convertKey(String)

convertKey

protected String convertKey(String key)

Convert the given key to a case-insensitive key.

The default implementation converts the key to lower-case according to this Map's Locale.

参数:

key - the user-specified key

返回:

the key to use for storing

另请参阅:

• String.toLowerCase(Locale)

removeEldestEntry

protected boolean removeEldestEntry(Map.Entry<String,V> eldest)

Determine whether this map should remove the given eldest entry.

参数:

eldest - the candidate entry

返回:

true for removing it, false for keeping it

另请参阅:

• LinkedHashMap.removeEldestEntry(java.util.Map.Entry<K, V>)

removeCaseInsensitiveKey

@Nullable
private String removeCaseInsensitiveKey(String key)