Package rx.internal.operators

Class OperatorToMultimap<T,K,V>

java.lang.Object

rx.internal.operators.OperatorToMultimap<T,K,V>

Type Parameters:

T - the value type of the input

K - the multimap-key type

V - the multimap-value type

All Implemented Interfaces:

Func1<Subscriber<? super Map<K,Collection<V>>>,Subscriber<? super T>>, Function, Observable.Operator<Map<K,Collection<V>>,T>

public final class OperatorToMultimap<T,K,V>
extends Object
implements Observable.Operator<Map<K,Collection<V>>,T>

Maps the elements of the source observable into a multimap (Map<K, Collection<V>>) where each key entry has a collection of the source's values.

See Also:

• Issue #97

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static final class	OperatorToMultimap.DefaultMultimapCollectionFactory<K,V>	The default collection factory for a key in the multimap returning an ArrayList independent of the key.
static final class	OperatorToMultimap.DefaultToMultimapFactory<K,V>	The default multimap factory returning a HashMap.

Field Summary

Fields

Modifier and Type	Field	Description
(package private) final Func1<? super K,? extends Collection<V>>	collectionFactory
(package private) final Func1<? super T,? extends K>	keySelector
private final Func0<? extends Map<K,Collection<V>>>	mapFactory
(package private) final Func1<? super T,? extends V>	valueSelector

Constructor Summary

Constructors

Constructor	Description
OperatorToMultimap(Func1<? super T,? extends K> keySelector, Func1<? super T,? extends V> valueSelector)	ToMultimap with key selector, custom value selector, default HashMap factory and default ArrayList collection factory.
OperatorToMultimap(Func1<? super T,? extends K> keySelector, Func1<? super T,? extends V> valueSelector, Func0<? extends Map<K,Collection<V>>> mapFactory)	ToMultimap with key selector, custom value selector, custom Map factory and default ArrayList collection factory.
OperatorToMultimap(Func1<? super T,? extends K> keySelector, Func1<? super T,? extends V> valueSelector, Func0<? extends Map<K,Collection<V>>> mapFactory, Func1<? super K,? extends Collection<V>> collectionFactory)	ToMultimap with key selector, custom value selector, custom Map factory and custom collection factory.

Method Summary

Modifier and Type	Method	Description
Subscriber<? super T>	call(Subscriber<? super Map<K,Collection<V>>> subscriber)

Methods inherited from class java.lang.Object

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

Field Details

keySelector

final Func1<? super T,? extends K> keySelector

valueSelector

final Func1<? super T,? extends V> valueSelector

mapFactory

private final Func0<? extends Map<K,Collection<V>>> mapFactory

collectionFactory

final Func1<? super K,? extends Collection<V>> collectionFactory

Constructor Details

OperatorToMultimap

public OperatorToMultimap(Func1<? super T,? extends K> keySelector,
 Func1<? super T,? extends V> valueSelector)

ToMultimap with key selector, custom value selector, default HashMap factory and default ArrayList collection factory.

Parameters:

keySelector - the function extracting the map-key from the main value

valueSelector - the function extracting the map-value from the main value

OperatorToMultimap

public OperatorToMultimap(Func1<? super T,? extends K> keySelector,
 Func1<? super T,? extends V> valueSelector,
 Func0<? extends Map<K,Collection<V>>> mapFactory)

ToMultimap with key selector, custom value selector, custom Map factory and default ArrayList collection factory.

Parameters:

keySelector - the function extracting the map-key from the main value

valueSelector - the function extracting the map-value from the main value

mapFactory - function that returns a Map instance to store keys and values into

OperatorToMultimap

public OperatorToMultimap(Func1<? super T,? extends K> keySelector,
 Func1<? super T,? extends V> valueSelector,
 Func0<? extends Map<K,Collection<V>>> mapFactory,
 Func1<? super K,? extends Collection<V>> collectionFactory)

ToMultimap with key selector, custom value selector, custom Map factory and custom collection factory.

Parameters:

keySelector - the function extracting the map-key from the main value

valueSelector - the function extracting the map-value from the main value

mapFactory - function that returns a Map instance to store keys and values into

collectionFactory - function that returns a Collection for a particular key to store values into

Method Details

call

public Subscriber<? super T> call(Subscriber<? super Map<K,Collection<V>>> subscriber)

Specified by:

call in interface Func1<T,K>