org.cactoos.map

Class Grouped<K,V,T>

java.lang.Object

org.cactoos.map.MapEnvelope<K,List<V>>

org.cactoos.map.Grouped<K,V,T>

Type Parameters:

K - Type of key

V - Type of value

T - Type of entry objects of functions

All Implemented Interfaces:

Map<K,List<V>>

public final class Grouped<K,V,T>
extends MapEnvelope<K,List<V>>

Iterable as Map.

This class groups objects from iterable by applying functions for keys and values

There is no thread-safety guarantee.

Since:

0.30

Nested Class Summary

Nested classes/interfaces inherited from interface java.util.Map

Map.Entry<K,V>

Constructor Summary

Constructors

Constructor and Description
Grouped(Iterable<T> list, Function<T,K> keys, Function<T,V> values) Ctor.

Method Summary

Methods inherited from class org.cactoos.map.MapEnvelope

clear, containsKey, containsValue, entrySet, equals, get, hashCode, isEmpty, keySet, put, putAll, remove, size, toString, values

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Map

compute, computeIfAbsent, computeIfPresent, forEach, getOrDefault, merge, putIfAbsent, remove, replace, replace, replaceAll

Constructor Detail

Grouped

public Grouped(Iterable<T> list,
               Function<T,K> keys,
               Function<T,V> values)

Ctor.

Parameters:

list - Iterable which is used to retrieve data from

keys - Function to get a key

values - Function to get a value