hu.akarnokd.rxjava3.expr

Class StatementSingle

java.lang.Object

hu.akarnokd.rxjava3.expr.StatementSingle

public final class StatementSingle
extends Object

Imperative statements expressed as Single operators.

Method Summary

Modifier and Type	Method and Description
static <R> Single<R>	ifThen(BooleanSupplier condition, SingleSource<? extends R> then, Single<? extends R> orElse) Return a Single that emits the emissions from one specified Single if a condition evaluates to true, or from another specified Single otherwise.
static <K,R> Single<R>	switchCase(Supplier<? extends K> caseSelector, Map<? super K,? extends SingleSource<? extends R>> mapOfCases, SingleSource<? extends R> defaultCase) Return a particular one of several possible Singles based on a case selector, or a default Single if the case selector does not map to a particular one.

Methods inherited from class java.lang.Object

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

Method Detail

switchCase

public static <K,R> Single<R> switchCase(Supplier<? extends K> caseSelector,
                                         Map<? super K,? extends SingleSource<? extends R>> mapOfCases,
                                         SingleSource<? extends R> defaultCase)

Return a particular one of several possible Singles based on a case selector, or a default Single if the case selector does not map to a particular one.

Type Parameters:

K - the case key type

R - the result value type

Parameters:

caseSelector - the function that produces a case key when an SingleObserver subscribes

mapOfCases - a map that maps a case key to a Single

defaultCase - the default Single if the mapOfCases doesn't contain a value for the key returned by the caseSelector

Returns:

a particular Single chosen by key from the map of Singles, or the default case if no Single matches the key

ifThen

public static <R> Single<R> ifThen(BooleanSupplier condition,
                                   SingleSource<? extends R> then,
                                   Single<? extends R> orElse)

Return a Single that emits the emissions from one specified Single if a condition evaluates to true, or from another specified Single otherwise.

Type Parameters:

R - the result value type

Parameters:

condition - the condition that decides which Single to emit the emissions from

then - the Single sequence to emit to if condition is true

orElse - the Single sequence to emit to if condition is false

Returns:

a Single that mimics either the then or orElse Singles depending on a condition function