com.mulesoft.mule.runtime.gw.api.functional

Class StreamsInMaps

java.lang.Object

com.mulesoft.mule.runtime.gw.api.functional.StreamsInMaps

public class StreamsInMaps
extends Object

Constructor Summary

Constructors

Constructor and Description
StreamsInMaps()

Method Summary

Modifier and Type	Method and Description
static <K,V1,V2> Collector<Map.Entry<K,V1>,?,Map<K,V2>>	mapWithValues(Function<Map.Entry<K,V1>,V2> valueMapper) Function to be used when streaming maps just to convert the value of the entries.

Methods inherited from class java.lang.Object

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

Constructor Detail

StreamsInMaps

public StreamsInMaps()

Method Detail

mapWithValues

public static <K,V1,V2> Collector<Map.Entry<K,V1>,?,Map<K,V2>> mapWithValues(Function<Map.Entry<K,V1>,V2> valueMapper)

Function to be used when streaming maps just to convert the value of the entries.

Example: "I would like to have a new map with the age of every person, but preserving the same keys". Lets suppose the key is a String, the conversion would be: Map<String, Person> --> Map<String, Integer>.

The code would look something like this (let 'persons' be the map):

Map<String, Integer> ages = persons.entrySet().stream().collect(mapWithValues(e -> e.getValue().age()));

Type Parameters:

K - key type.

V1 - original map's value type to convert.

V2 - resulting map's value type after conversion.

Parameters:

valueMapper - value conversion function.

Returns:

The Collector of the Map.