Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

2.x: Add Flowable.switchMap{Maybe,Single}{DelayError} operators #5873

Merged
merged 1 commit into from
Mar 2, 2018
Merged

2.x: Add Flowable.switchMap{Maybe,Single}{DelayError} operators #5873

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
140 changes: 140 additions & 0 deletions src/main/java/io/reactivex/Flowable.java
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -14292,6 +14292,146 @@ <R> Flowable<R> switchMap0(Function<? super T, ? extends Publisher<? extends R>>
return RxJavaPlugins.onAssembly(new FlowableSwitchMap<T, R>(this, mapper, bufferSize, delayError));
}

/**
* Maps the upstream items into {@link MaybeSource}s and switches (subscribes) to the newer ones
* while disposing the older ones (and ignoring their signals) and emits the latest success value of the current one if
* available while failing immediately if this {@code Flowable} or any of the
* active inner {@code MaybeSource}s fail.
* <p>
* <img width="640" height="350" src="https://raw.github.com/wiki/ReactiveX/RxJava/images/rx-operators/switchMap.png" alt="">
* <dl>
* <dt><b>Backpressure:</b></dt>
* <dd>The operator honors backpressure from downstream. The main {@code Flowable} is consumed in an
* unbounded manner (i.e., without backpressure).</dd>
* <dt><b>Scheduler:</b></dt>
* <dd>{@code switchMapMaybe} does not operate by default on a particular {@link Scheduler}.</dd>
* <dt><b>Error handling:</b></dt>
* <dd>This operator terminates with an {@code onError} if this {@code Flowable} or any of
* the inner {@code MaybeSource}s fail while they are active. When this happens concurrently, their
* individual {@code Throwable} errors may get combined and emitted as a single
* {@link io.reactivex.exceptions.CompositeException CompositeException}. Otherwise, a late
* (i.e., inactive or switched out) {@code onError} from this {@code Flowable} or from any of
* the inner {@code MaybeSource}s will be forwarded to the global error handler via
* {@link io.reactivex.plugins.RxJavaPlugins#onError(Throwable)} as
* {@link io.reactivex.exceptions.UndeliverableException UndeliverableException}</dd>
* </dl>
* @param <R> the output value type
* @param mapper the function called with the current upstream event and should
* return a {@code MaybeSource} to replace the current active inner source
* and get subscribed to.
* @return the new Flowable instance
* @since 2.1.11 - experimental
* @see #switchMapMaybe(Function)
*/
@CheckReturnValue
@BackpressureSupport(BackpressureKind.UNBOUNDED_IN)
@SchedulerSupport(SchedulerSupport.NONE)
@Experimental
public final <R> Flowable<R> switchMapMaybe(@NonNull Function<? super T, ? extends MaybeSource<? extends R>> mapper) {
ObjectHelper.requireNonNull(mapper, "mapper is null");
return RxJavaPlugins.onAssembly(new FlowableSwitchMapMaybe<T, R>(this, mapper, false));
}

/**
* Maps the upstream items into {@link MaybeSource}s and switches (subscribes) to the newer ones
* while disposing the older ones (and ignoring their signals) and emits the latest success value of the current one if
* available, delaying errors from this {@code Flowable} or the inner {@code MaybeSource}s until all terminate.
* <p>
* <img width="640" height="350" src="https://raw.github.com/wiki/ReactiveX/RxJava/images/rx-operators/switchMap.png" alt="">
* <dl>
* <dt><b>Backpressure:</b></dt>
* <dd>The operator honors backpressure from downstream. The main {@code Flowable} is consumed in an
* unbounded manner (i.e., without backpressure).</dd>
* <dt><b>Scheduler:</b></dt>
* <dd>{@code switchMapMaybeDelayError} does not operate by default on a particular {@link Scheduler}.</dd>
* </dl>
* @param <R> the output value type
* @param mapper the function called with the current upstream event and should
* return a {@code MaybeSource} to replace the current active inner source
* and get subscribed to.
* @return the new Flowable instance
* @since 2.1.11 - experimental
* @see #switchMapMaybe(Function)
*/
@CheckReturnValue
@BackpressureSupport(BackpressureKind.UNBOUNDED_IN)
@SchedulerSupport(SchedulerSupport.NONE)
@Experimental
public final <R> Flowable<R> switchMapMaybeDelayError(@NonNull Function<? super T, ? extends MaybeSource<? extends R>> mapper) {
ObjectHelper.requireNonNull(mapper, "mapper is null");
return RxJavaPlugins.onAssembly(new FlowableSwitchMapMaybe<T, R>(this, mapper, true));
}

/**
* Maps the upstream items into {@link SingleSource}s and switches (subscribes) to the newer ones
* while disposing the older ones (and ignoring their signals) and emits the latest success value of the current one
* while failing immediately if this {@code Flowable} or any of the
* active inner {@code SingleSource}s fail.
* <p>
* <img width="640" height="350" src="https://raw.github.com/wiki/ReactiveX/RxJava/images/rx-operators/switchMap.png" alt="">
* <dl>
* <dt><b>Backpressure:</b></dt>
* <dd>The operator honors backpressure from downstream. The main {@code Flowable} is consumed in an
* unbounded manner (i.e., without backpressure).</dd>
* <dt><b>Scheduler:</b></dt>
* <dd>{@code switchMapSingle} does not operate by default on a particular {@link Scheduler}.</dd>
* <dt><b>Error handling:</b></dt>
* <dd>This operator terminates with an {@code onError} if this {@code Flowable} or any of
* the inner {@code SingleSource}s fail while they are active. When this happens concurrently, their
* individual {@code Throwable} errors may get combined and emitted as a single
* {@link io.reactivex.exceptions.CompositeException CompositeException}. Otherwise, a late
* (i.e., inactive or switched out) {@code onError} from this {@code Flowable} or from any of
* the inner {@code SingleSource}s will be forwarded to the global error handler via
* {@link io.reactivex.plugins.RxJavaPlugins#onError(Throwable)} as
* {@link io.reactivex.exceptions.UndeliverableException UndeliverableException}</dd>
* </dl>
* @param <R> the output value type
* @param mapper the function called with the current upstream event and should
* return a {@code SingleSource} to replace the current active inner source
* and get subscribed to.
* @return the new Flowable instance
* @since 2.1.11 - experimental
* @see #switchMapSingle(Function)
*/
@CheckReturnValue
@BackpressureSupport(BackpressureKind.UNBOUNDED_IN)
@SchedulerSupport(SchedulerSupport.NONE)
@Experimental
public final <R> Flowable<R> switchMapSingle(@NonNull Function<? super T, ? extends SingleSource<? extends R>> mapper) {
ObjectHelper.requireNonNull(mapper, "mapper is null");
return RxJavaPlugins.onAssembly(new FlowableSwitchMapSingle<T, R>(this, mapper, false));
}

/**
* Maps the upstream items into {@link SingleSource}s and switches (subscribes) to the newer ones
* while disposing the older ones (and ignoring their signals) and emits the latest success value of the current one,
* delaying errors from this {@code Flowable} or the inner {@code SingleSource}s until all terminate.
* <p>
* <img width="640" height="350" src="https://raw.github.com/wiki/ReactiveX/RxJava/images/rx-operators/switchMap.png" alt="">
* <dl>
* <dt><b>Backpressure:</b></dt>
* <dd>The operator honors backpressure from downstream. The main {@code Flowable} is consumed in an
* unbounded manner (i.e., without backpressure).</dd>
* <dt><b>Scheduler:</b></dt>
* <dd>{@code switchMapSingleDelayError} does not operate by default on a particular {@link Scheduler}.</dd>
* </dl>
* @param <R> the output value type
* @param mapper the function called with the current upstream event and should
* return a {@code SingleSource} to replace the current active inner source
* and get subscribed to.
* @return the new Flowable instance
* @since 2.1.11 - experimental
* @see #switchMapSingle(Function)
*/
@CheckReturnValue
@BackpressureSupport(BackpressureKind.UNBOUNDED_IN)
@SchedulerSupport(SchedulerSupport.NONE)
@Experimental
public final <R> Flowable<R> switchMapSingleDelayError(@NonNull Function<? super T, ? extends SingleSource<? extends R>> mapper) {
ObjectHelper.requireNonNull(mapper, "mapper is null");
return RxJavaPlugins.onAssembly(new FlowableSwitchMapSingle<T, R>(this, mapper, true));
}

/**
* Returns a Flowable that emits only the first {@code count} items emitted by the source Publisher. If the source emits fewer than
* {@code count} items then all of its items are emitted.
Expand Down
Loading