Package io.activej.inject.binding

Class Multibinders

java.lang.Object

io.activej.inject.binding.Multibinders

public final class Multibinders
extends Object

Constructor Summary

Constructors

Constructor	Description
Multibinders()

Method Summary

Modifier and Type	Method	Description
static Multibinder<?>	combinedMultibinder(Map<Key<?>,Multibinder<?>> multibinders)	Combines all multibinders into one by their type and returns universal multibinder for any key from the map, falling back to errorOnDuplicate() when map contains no multibinder for a given key.
static <T> Multibinder<T>	errorOnDuplicate()	Default multibinder that just throws an exception if there is more than one binding per key.
static <T> Multibinder<T>	ofBinaryOperator(BinaryOperator<T> binaryOperator)	Multibinder that returns a binding that reduces all instances provided by all conflicting bindings using a binary operator.
static <T> Multibinder<T>	ofReducer(BiFunction<Key<T>,Stream<T>,T> reducerFunction)	Multibinder that returns a binding that applies given reducing function to a stream of instances provided by all conflicting bindings.
static <K, V> Multibinder<Map<K,V>>	toMap()	Multibinder that returns a binding for a merged map of maps provided by all conflicting bindings.
static <T> Multibinder<Set<T>>	toSet()	Multibinder that returns a binding for a merged set of sets provided by all conflicting bindings.

Methods inherited from class java.lang.Object

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

Constructor Details

Multibinders

public Multibinders()

Method Details

errorOnDuplicate

public static <T> Multibinder<T> errorOnDuplicate()

Default multibinder that just throws an exception if there is more than one binding per key.

ofReducer

public static <T> Multibinder<T> ofReducer(BiFunction<Key<T>,Stream<T>,T> reducerFunction)

Multibinder that returns a binding that applies given reducing function to a stream of instances provided by all conflicting bindings.

ofBinaryOperator

public static <T> Multibinder<T> ofBinaryOperator(BinaryOperator<T> binaryOperator)

Multibinder that returns a binding that reduces all instances provided by all conflicting bindings using a binary operator.

See Also:

• ofReducer(java.util.function.BiFunction<io.activej.inject.Key<T>, java.util.stream.Stream<T>, T>)

toSet

public static <T> Multibinder<Set<T>> toSet()

Multibinder that returns a binding for a merged set of sets provided by all conflicting bindings.

toMap

public static <K,
V> Multibinder<Map<K,V>> toMap()

Multibinder that returns a binding for a merged map of maps provided by all conflicting bindings.

Throws:

DIException - on map merge conflicts

combinedMultibinder

public static Multibinder<?> combinedMultibinder(Map<Key<?>,Multibinder<?>> multibinders)

Combines all multibinders into one by their type and returns universal multibinder for any key from the map, falling back to errorOnDuplicate() when map contains no multibinder for a given key.