com.alibaba.nacos.common.utils

类 MapUtils

java.lang.Object

com.alibaba.nacos.common.utils.MapUtils

public class MapUtils
extends Object

Map utils.

作者:

liaochuntao

构造器概要

构造器

构造器和说明
MapUtils()

方法概要

限定符和类型	方法和说明
static Object	computeIfAbsent(Map target, Object key, BiFunction mappingFunction, Object param1, Object param2) ComputeIfAbsent lazy load.
static boolean	isEmpty(Dictionary coll) Null-safe check if the specified Dictionary is empty.
static boolean	isEmpty(Map map) Null-safe check if the specified Dictionary is empty.
static boolean	isNotEmpty(Dictionary coll) Null-safe check if the specified Dictionary is not empty.
static boolean	isNotEmpty(Map map) Null-safe check if the specified Dictionary is not empty.
static void	putIfValNoEmpty(Map target, Object key, Object value) Put into map if value is not empty.
static void	putIfValNoNull(Map target, Object key, Object value) Put into map if value is not null.

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

构造器详细资料

MapUtils

public MapUtils()

方法详细资料

isEmpty

public static boolean isEmpty(Map map)

Null-safe check if the specified Dictionary is empty.

Null returns true.

参数:

map - the collection to check, may be null

返回:

true if empty or null

isEmpty

public static boolean isEmpty(Dictionary coll)

Null-safe check if the specified Dictionary is empty.

Null returns true.

参数:

coll - the collection to check, may be null

返回:

true if empty or null

isNotEmpty

public static boolean isNotEmpty(Map map)

Null-safe check if the specified Dictionary is not empty.

Null returns false.

参数:

map - the collection to check, may be null

返回:

true if non-null and non-empty

isNotEmpty

public static boolean isNotEmpty(Dictionary coll)

Null-safe check if the specified Dictionary is not empty.

Null returns false.

参数:

coll - the collection to check, may be null

返回:

true if non-null and non-empty

putIfValNoNull

public static void putIfValNoNull(Map target,
                                  Object key,
                                  Object value)

Put into map if value is not null.

参数:

target - target map

key - key

value - value

putIfValNoEmpty

public static void putIfValNoEmpty(Map target,
                                   Object key,
                                   Object value)

Put into map if value is not empty.

参数:

target - target map

key - key

value - value

computeIfAbsent

@NotThreadSafe
public static Object computeIfAbsent(Map target,
                                                    Object key,
                                                    BiFunction mappingFunction,
                                                    Object param1,
                                                    Object param2)

ComputeIfAbsent lazy load.

参数:

target - target Map data.

key - map key.

mappingFunction - function which is need to be executed.

param1 - function's parameter value1.

param2 - function's parameter value1.

返回: