org.opencms.gwt.client.util

类 CmsClientCollectionUtil

java.lang.Object

org.opencms.gwt.client.util.CmsClientCollectionUtil

public final class CmsClientCollectionUtil
extends java.lang.Object

A utility class with functions for dealing with maps.

从以下版本开始:

8.0.0

方法概要

方法

限定符和类型	方法和说明
static <A> java.util.Set<A>	intersection(java.util.Set<A> first, java.util.Set<A> second) Returns the intersection of two sets without modifying the original sets.
static boolean	isEmptyOrNull(java.util.Collection<?> collection) Checks whether a collection is empty or null.
static java.util.Map<java.lang.String,java.lang.String>	parseProperties(java.lang.String text) Parses properties from a string and returns them in a map.
static <A,B> java.util.Map<A,B>	removeNullEntries(java.util.Map<A,B> map) Returns a new map with all entries of the input map except those which have a value of null.
static <A,B> void	updateMapAndRemoveNulls(java.util.Map<A,B> source, java.util.Map<A,B> target) Copies entries from one map to another and deletes those entries in the target map for which the value in the source map is null.

从类继承的方法 java.lang.Object

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

方法详细资料

intersection

public static <A> java.util.Set<A> intersection(java.util.Set<A> first,
                                java.util.Set<A> second)

Returns the intersection of two sets without modifying the original sets.

类型参数:

A - the type of objects contained in the sets

参数:

first - the first set

second - the second set

返回:

the intersection of both sets

isEmptyOrNull

public static boolean isEmptyOrNull(java.util.Collection<?> collection)

Checks whether a collection is empty or null.

参数:

collection - a collection

返回:

true if collection is null or empty.

parseProperties

public static java.util.Map<java.lang.String,java.lang.String> parseProperties(java.lang.String text)

Parses properties from a string and returns them in a map.

参数:

text - the text containing the properties

返回:

the map with the parsed properties

removeNullEntries

public static <A,B> java.util.Map<A,B> removeNullEntries(java.util.Map<A,B> map)

Returns a new map with all entries of the input map except those which have a value of null.

类型参数:

A - the key type of the map

B - the value type of the map

参数:

map - the input map

返回:

a map with all null entries removed

updateMapAndRemoveNulls

public static <A,B> void updateMapAndRemoveNulls(java.util.Map<A,B> source,
                                 java.util.Map<A,B> target)

Copies entries from one map to another and deletes those entries in the target map for which the value in the source map is null.

类型参数:

A - the key type of the map

B - the value type of the map

参数:

source - the source map

target - the target map