Package org.aoju.bus.setting.metric

Class GroupMap

java.lang.Object

java.util.AbstractMap<K,V>

java.util.HashMap<K,V>

java.util.LinkedHashMap<String,LinkedHashMap<String,String>>

org.aoju.bus.setting.metric.GroupMap

All Implemented Interfaces:

Serializable, Cloneable, Map<String,LinkedHashMap<String,String>>

public class GroupMap
extends LinkedHashMap<String,LinkedHashMap<String,String>>

基于分组的Map

Since:

Java 17+

Author:

Kimi Liu

See Also:

• Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class java.util.AbstractMap

AbstractMap.SimpleEntry<K,V>, AbstractMap.SimpleImmutableEntry<K,V>

Constructor Summary

Constructors

Constructor	Description
GroupMap()

Method Summary

Modifier and Type	Method	Description
GroupMap	clear(String group)	清除指定分组下的所有键值对
boolean	containsKey(String group, String key)	指定分组中是否包含指定key
boolean	containsValue(String group, String value)	指定分组中是否包含指定值
Set<Map.Entry<String,String>>	entrySet(String group)	指定分组下所有键值对
String	get(CharSequence group, CharSequence key)	获取分组对应的值,如果分组不存在或者值不存在则返回null
boolean	isEmpty()	是否为空,如果多个分组同时为空,也按照空处理
boolean	isEmpty(String group)	某个分组对应的键值对是否为空
Set<String>	keySet(String group)	指定分组所有键的Set
String	put(String group, String key, String value)	将键值对加入到对应分组中
GroupMap	putAll(String group, Map<? extends String,? extends String> m)	加入多个键值对到某个分组下
String	remove(String group, String key)	从指定分组中删除指定值
int	size()	总的键值对数
Collection<String>	values(String group)	指定分组下所有值

Methods inherited from class java.util.LinkedHashMap

clear, containsValue, entrySet, forEach, get, getOrDefault, keySet, newLinkedHashMap, removeEldestEntry, replaceAll, values

Methods inherited from class java.util.HashMap

clone, compute, computeIfAbsent, computeIfPresent, containsKey, merge, newHashMap, put, putAll, putIfAbsent, remove, remove, replace, replace

Methods inherited from class java.util.AbstractMap

equals, hashCode, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Map

compute, computeIfAbsent, computeIfPresent, containsKey, equals, hashCode, merge, put, putAll, putIfAbsent, remove, remove, replace, replace

Constructor Details

GroupMap

public GroupMap()

Method Details

get

public String get(CharSequence group,
 CharSequence key)

获取分组对应的值,如果分组不存在或者值不存在则返回null

Parameters:

group - 分组

key - 键

Returns:

值, 如果分组不存在或者值不存在则返回null

size

public int size()

总的键值对数

Specified by:

size in interface Map<String,LinkedHashMap<String,String>>

Overrides:

size in class HashMap<String,LinkedHashMap<String,String>>

Returns:

总键值对数

put

public String put(String group,
 String key,
 String value)

将键值对加入到对应分组中

Parameters:

group - 分组

key - 键

value - 值

Returns:

此key之前存在的值, 如果没有返回null

putAll

public GroupMap putAll(String group,
 Map<? extends String,? extends String> m)

加入多个键值对到某个分组下

Parameters:

group - 分组

m - 键值对

Returns:

this

remove

public String remove(String group,
 String key)

从指定分组中删除指定值

Parameters:

group - 分组

key - 键

Returns:

被删除的值, 如果值不存在, 返回null

isEmpty

public boolean isEmpty(String group)

某个分组对应的键值对是否为空

Parameters:

group - 分组

Returns:

是否为空

isEmpty

public boolean isEmpty()

是否为空,如果多个分组同时为空,也按照空处理

Specified by:

isEmpty in interface Map<String,LinkedHashMap<String,String>>

Overrides:

isEmpty in class HashMap<String,LinkedHashMap<String,String>>

Returns:

是否为空, 如果多个分组同时为空, 也按照空处理

containsKey

public boolean containsKey(String group,
 String key)

指定分组中是否包含指定key

Parameters:

group - 分组

key - 键

Returns:

是否包含key

containsValue

public boolean containsValue(String group,
 String value)

指定分组中是否包含指定值

Parameters:

group - 分组

value - 值

Returns:

是否包含值

clear

public GroupMap clear(String group)

清除指定分组下的所有键值对

Parameters:

group - 分组

Returns:

this

keySet

public Set<String> keySet(String group)

指定分组所有键的Set

Parameters:

group - 分组

Returns:

键Set

values

public Collection<String> values(String group)

指定分组下所有值

Parameters:

group - 分组

Returns:

值

entrySet

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

指定分组下所有键值对

Parameters:

group - 分组

Returns:

键值对