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/**
* Copyright 2014 Netflix, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software distributed under the License is
* distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See
* the License for the specific language governing permissions and limitations under the License.
*/
package rx;
import static rx.functions.Functions.alwaysFalse;
import java.util.*;
import java.util.concurrent.*;
import rx.exceptions.*;
import rx.functions.*;
import rx.internal.operators.*;
import rx.observables.*;
import rx.observers.SafeSubscriber;
import rx.plugins.*;
import rx.schedulers.*;
import rx.subjects.*;
import rx.subscriptions.Subscriptions;
/**
* The Observable class that implements the Reactive Pattern.
* <p>
* This class provides methods for subscribing to the Observable as well as delegate methods to the various
* Observers.
* <p>
* The documentation for this class makes use of marble diagrams. The following legend explains these diagrams:
* <p>
* <img width="640" height="301" src="https://raw.github.com/wiki/Netflix/RxJava/images/rx-operators/legend.png">
* <p>
* For more information see the <a href="https://github.com/Netflix/RxJava/wiki/Observable">RxJava Wiki</a>
*
* @param <T>
* the type of the items emitted by the Observable
*/
public class Observable<T> {
final OnSubscribe<T> onSubscribe;
/**
* Creates an Observable with a Function to execute when it is subscribed to.
* <p>
* <em>Note:</em> Use {@link #create(OnSubscribe)} to create an Observable, instead of this constructor,
* unless you specifically have a need for inheritance.
*
* @param f
* {@link OnSubscribe} to be executed when {@link #subscribe(Subscriber)} is called
*/
protected Observable(OnSubscribe<T> f) {
this.onSubscribe = f;
}
private static final RxJavaObservableExecutionHook hook = RxJavaPlugins.getInstance().getObservableExecutionHook();
/**
* Returns an Observable that will execute the specified function when a {@link Subscriber} subscribes to
* it.
* <p>
* <img width="640" height="200" src="https://raw.github.com/wiki/Netflix/RxJava/images/rx-operators/create.png">
* <p>
* Write the function you pass to {@code create} so that it behaves as an Observable: It should invoke the
* Subscriber's {@link Subscriber#onNext onNext}, {@link Subscriber#onError onError}, and
* {@link Subscriber#onCompleted onCompleted} methods appropriately.
* <p>
* A well-formed Observable must invoke either the Subscriber's {@code onCompleted} method exactly once or
* its {@code onError} method exactly once.
* <p>
* See <a href="http://go.microsoft.com/fwlink/?LinkID=205219">Rx Design Guidelines (PDF)</a> for detailed
* information.
* <p>
* {@code create} does not operate by default on a particular {@link Scheduler}.
*
* @param <T>
* the type of the items that this Observable emits
* @param f
* a function that accepts an {@code Subscriber<T>}, and invokes its {@code onNext}, {@code onError}, and {@code onCompleted} methods as appropriate
* @return an Observable that, when a {@link Subscriber} subscribes to it, will execute the specified
* function
* @see <a href="https://github.com/Netflix/RxJava/wiki/Creating-Observables#wiki-create">RxJava Wiki: create()</a>
* @see <a href="http://msdn.microsoft.com/en-us/library/system.reactive.linq.observable.create.aspx">MSDN: Observable.Create</a>
*/
public final static <T> Observable<T> create(OnSubscribe<T> f) {
return new Observable<T>(hook.onCreate(f));
}
/**
* Invoked when Obserable.subscribe is called.
*/
public static interface OnSubscribe<T> extends Action1<Subscriber<? super T>> {
// cover for generics insanity
}
/**
* Operator function for lifting into an Observable.
*/
public interface Operator<R, T> extends Func1<Subscriber<? super R>, Subscriber<? super T>> {
// cover for generics insanity
}
/**
* @deprecated use {@link #create(OnSubscribe)}
*/
@Deprecated
public final static <T> Observable<T> create(final OnSubscribeFunc<T> f) {
return new Observable<T>(new OnSubscribe<T>() {
@Override
public void call(Subscriber<? super T> observer) {
Subscription s = f.onSubscribe(observer);
if (s != null && s != observer) {
observer.add(s);
}
}
});
}
/**
* @deprecated use {@link OnSubscribe}
*/
@Deprecated
public static interface OnSubscribeFunc<T> extends Function {
public Subscription onSubscribe(Observer<? super T> op);
}
/**
* Lifts a function to the current Observable and returns a new Observable that when subscribed to will pass
* the values of the current Observable through the Operator function.
* <p>
* In other words, this allows chaining Observers together on an Observable for acting on the values within
* the Observable.
* <p> {@code
* observable.map(...).filter(...).take(5).lift(new OperatorA()).lift(new OperatorB(...)).subscribe()
* }
* <p>
* {@code lift} does not operate by default on a particular {@link Scheduler}.
*
* @param lift the Operator that implements the Observable-operating function to be applied to the source
* Observable
* @return an Observable that is the result of applying the lifted Operator to the source Observable
* @since 0.17
*/
public final <R> Observable<R> lift(final Operator<? extends R, ? super T> lift) {
return new Observable<R>(new OnSubscribe<R>() {
@Override
public void call(Subscriber<? super R> o) {
try {
onSubscribe.call(hook.onLift(lift).call(o));
} catch (Throwable e) {
// localized capture of errors rather than it skipping all operators
// and ending up in the try/catch of the subscribe method which then
// prevents onErrorResumeNext and other similar approaches to error handling
if (e instanceof OnErrorNotImplementedException) {
throw (OnErrorNotImplementedException) e;
}
o.onError(e);
}
}
});
}
/* *********************************************************************************************************
* Observers Below Here
* *********************************************************************************************************
*/
/**
* Mirrors the one Observable in an Iterable of several Observables that first emits an item.
* <p>
* <img width="640" height="385" src="https://raw.github.com/wiki/Netflix/RxJava/images/rx-operators/amb.png">
* <p>
* {@code amb} does not operate by default on a particular {@link Scheduler}.
*
* @param sources
* an Iterable of Observable sources competing to react first
* @return an Observable that emits the same sequence of items as whichever of the source Observables first
* emitted an item
* @see <a href="https://github.com/Netflix/RxJava/wiki/Conditional-and-Boolean-Operators#wiki-amb">RxJava Wiki: amb()</a>
* @see <a href="http://msdn.microsoft.com/en-us/library/hh229115.aspx">MSDN: Observable.Amb</a>
*/
public final static <T> Observable<T> amb(Iterable<? extends Observable<? extends T>> sources) {
return create(OnSubscribeAmb.amb(sources));
}
/**
* Given two Observables, mirrors the one that first emits an item.
* <p>
* <img width="640" height="385" src="https://raw.github.com/wiki/Netflix/RxJava/images/rx-operators/amb.png">
* <p>
* {@code amb} does not operate by default on a particular {@link Scheduler}.
*
* @param o1
* an Observable competing to react first
* @param o2
* an Observable competing to react first
* @return an Observable that emits the same sequence of items as whichever of the source Observables first
* emitted an item
* @see <a href="https://github.com/Netflix/RxJava/wiki/Conditional-and-Boolean-Operators#wiki-amb">RxJava Wiki: amb()</a>
* @see <a href="http://msdn.microsoft.com/en-us/library/hh229733.aspx">MSDN: Observable.Amb</a>
*/
public final static <T> Observable<T> amb(Observable<? extends T> o1, Observable<? extends T> o2) {
return create(OnSubscribeAmb.amb(o1, o2));
}
/**
* Given three Observables, mirrors the one that first emits an item.
* <p>
* <img width="640" height="385" src="https://raw.github.com/wiki/Netflix/RxJava/images/rx-operators/amb.png">
* <p>
* {@code amb} does not operate by default on a particular {@link Scheduler}.
*
* @param o1
* an Observable competing to react first
* @param o2
* an Observable competing to react first
* @param o3
* an Observable competing to react first
* @return an Observable that emits the same sequence of items as whichever of the source Observables first
* emitted an item
* @see <a href="https://github.com/Netflix/RxJava/wiki/Conditional-and-Boolean-Operators#wiki-amb">RxJava Wiki: amb()</a>
* @see <a href="http://msdn.microsoft.com/en-us/library/hh229733.aspx">MSDN: Observable.Amb</a>
*/
public final static <T> Observable<T> amb(Observable<? extends T> o1, Observable<? extends T> o2, Observable<? extends T> o3) {
return create(OnSubscribeAmb.amb(o1, o2, o3));
}
/**
* Given four Observables, mirrors the one that first emits an item.
* <p>
* <img width="640" height="385" src="https://raw.github.com/wiki/Netflix/RxJava/images/rx-operators/amb.png">
* <p>
* {@code amb} does not operate by default on a particular {@link Scheduler}.
*
* @param o1
* an Observable competing to react first
* @param o2
* an Observable competing to react first
* @param o3
* an Observable competing to react first
* @param o4
* an Observable competing to react first
* @return an Observable that emits the same sequence of items as whichever of the source Observables first
* emitted an item
* @see <a href="https://github.com/Netflix/RxJava/wiki/Conditional-and-Boolean-Operators#wiki-amb">RxJava Wiki: amb()</a>
* @see <a href="http://msdn.microsoft.com/en-us/library/hh229733.aspx">MSDN: Observable.Amb</a>
*/
public final static <T> Observable<T> amb(Observable<? extends T> o1, Observable<? extends T> o2, Observable<? extends T> o3, Observable<? extends T> o4) {
return create(OnSubscribeAmb.amb(o1, o2, o3, o4));
}
/**
* Given five Observables, mirrors the one that first emits an item.
* <p>
* <img width="640" height="385" src="https://raw.github.com/wiki/Netflix/RxJava/images/rx-operators/amb.png">
* <p>
* {@code amb} does not operate by default on a particular {@link Scheduler}.
*
* @param o1
* an Observable competing to react first
* @param o2
* an Observable competing to react first
* @param o3
* an Observable competing to react first
* @param o4
* an Observable competing to react first
* @param o5
* an Observable competing to react first
* @return an Observable that emits the same sequence of items as whichever of the source Observables first
* emitted an item
* @see <a href="https://github.com/Netflix/RxJava/wiki/Conditional-and-Boolean-Operators#wiki-amb">RxJava Wiki: amb()</a>
* @see <a href="http://msdn.microsoft.com/en-us/library/hh229733.aspx">MSDN: Observable.Amb</a>
*/
public final static <T> Observable<T> amb(Observable<? extends T> o1, Observable<? extends T> o2, Observable<? extends T> o3, Observable<? extends T> o4, Observable<? extends T> o5) {
return create(OnSubscribeAmb.amb(o1, o2, o3, o4, o5));
}
/**
* Given six Observables, mirrors the one that first emits an item.
* <p>
* <img width="640" height="385" src="https://raw.github.com/wiki/Netflix/RxJava/images/rx-operators/amb.png">
* <p>
* {@code amb} does not operate by default on a particular {@link Scheduler}.
*
* @param o1
* an Observable competing to react first
* @param o2
* an Observable competing to react first
* @param o3
* an Observable competing to react first
* @param o4
* an Observable competing to react first
* @param o5
* an Observable competing to react first
* @param o6
* an Observable competing to react first
* @return an Observable that emits the same sequence of items as whichever of the source Observables first
* emitted an item
* @see <a href="https://github.com/Netflix/RxJava/wiki/Conditional-and-Boolean-Operators#wiki-amb">RxJava Wiki: amb()</a>
* @see <a href="http://msdn.microsoft.com/en-us/library/hh229733.aspx">MSDN: Observable.Amb</a>
*/
public final static <T> Observable<T> amb(Observable<? extends T> o1, Observable<? extends T> o2, Observable<? extends T> o3, Observable<? extends T> o4, Observable<? extends T> o5, Observable<? extends T> o6) {
return create(OnSubscribeAmb.amb(o1, o2, o3, o4, o5, o6));
}
/**
* Given seven Observables, mirrors the one that first emits an item.
* <p>
* <img width="640" height="385" src="https://raw.github.com/wiki/Netflix/RxJava/images/rx-operators/amb.png">
* <p>
* {@code amb} does not operate by default on a particular {@link Scheduler}.
*
* @param o1
* an Observable competing to react first
* @param o2
* an Observable competing to react first
* @param o3
* an Observable competing to react first
* @param o4
* an Observable competing to react first
* @param o5
* an Observable competing to react first
* @param o6
* an Observable competing to react first
* @param o7
* an Observable competing to react first
* @return an Observable that emits the same sequence of items as whichever of the source Observables first
* emitted an item
* @see <a href="https://github.com/Netflix/RxJava/wiki/Conditional-and-Boolean-Operators#wiki-amb">RxJava Wiki: amb()</a>
* @see <a href="http://msdn.microsoft.com/en-us/library/hh229733.aspx">MSDN: Observable.Amb</a>
*/
public final static <T> Observable<T> amb(Observable<? extends T> o1, Observable<? extends T> o2, Observable<? extends T> o3, Observable<? extends T> o4, Observable<? extends T> o5, Observable<? extends T> o6, Observable<? extends T> o7) {
return create(OnSubscribeAmb.amb(o1, o2, o3, o4, o5, o6, o7));
}
/**
* Given eight Observables, mirrors the one that first emits an item.
* <p>
* <img width="640" height="385" src="https://raw.github.com/wiki/Netflix/RxJava/images/rx-operators/amb.png">
* <p>
* {@code amb} does not operate by default on a particular {@link Scheduler}.
*
* @param o1
* an Observable competing to react first
* @param o2
* an Observable competing to react first
* @param o3
* an Observable competing to react first
* @param o4
* an Observable competing to react first
* @param o5
* an Observable competing to react first
* @param o6
* an Observable competing to react first
* @param o7
* an Observable competing to react first
* @param o8
* an observable competing to react first
* @return an Observable that emits the same sequence of items as whichever of the source Observables first
* emitted an item
* @see <a href="https://github.com/Netflix/RxJava/wiki/Conditional-and-Boolean-Operators#wiki-amb">RxJava Wiki: amb()</a>
* @see <a href="http://msdn.microsoft.com/en-us/library/hh229733.aspx">MSDN: Observable.Amb</a>
*/
public final static <T> Observable<T> amb(Observable<? extends T> o1, Observable<? extends T> o2, Observable<? extends T> o3, Observable<? extends T> o4, Observable<? extends T> o5, Observable<? extends T> o6, Observable<? extends T> o7, Observable<? extends T> o8) {
return create(OnSubscribeAmb.amb(o1, o2, o3, o4, o5, o6, o7, o8));
}
/**
* Given nine Observables, mirrors the one that first emits an item.
* <p>
* <img width="640" height="385" src="https://raw.github.com/wiki/Netflix/RxJava/images/rx-operators/amb.png">
* <p>
* {@code amb} does not operate by default on a particular {@link Scheduler}.
*
* @param o1
* an Observable competing to react first
* @param o2
* an Observable competing to react first
* @param o3
* an Observable competing to react first
* @param o4
* an Observable competing to react first
* @param o5
* an Observable competing to react first
* @param o6
* an Observable competing to react first
* @param o7
* an Observable competing to react first
* @param o8
* an Observable competing to react first
* @param o9
* an Observable competing to react first
* @return an Observable that emits the same sequence of items as whichever of the source Observables first
* emitted an item
* @see <a href="https://github.com/Netflix/RxJava/wiki/Conditional-and-Boolean-Operators#wiki-amb">RxJava Wiki: amb()</a>
* @see <a href="http://msdn.microsoft.com/en-us/library/hh229733.aspx">MSDN: Observable.Amb</a>
*/
public final static <T> Observable<T> amb(Observable<? extends T> o1, Observable<? extends T> o2, Observable<? extends T> o3, Observable<? extends T> o4, Observable<? extends T> o5, Observable<? extends T> o6, Observable<? extends T> o7, Observable<? extends T> o8, Observable<? extends T> o9) {
return create(OnSubscribeAmb.amb(o1, o2, o3, o4, o5, o6, o7, o8, o9));
}
/**
* Combines two source Observables by emitting an item that aggregates the latest values of each of the
* source Observables each time an item is received from either of the source Observables, where this
* aggregation is defined by a specified function.
* <p>
* <img width="640" height="380" src="https://raw.github.com/wiki/Netflix/RxJava/images/rx-operators/combineLatest.png">
* <p>
* {@code combineLatest} does not operate by default on a particular {@link Scheduler}.
*
* @param o1
* the first source Observable
* @param o2
* the second source Observable
* @param combineFunction
* the aggregation function used to combine the items emitted by the source Observables
* @return an Observable that emits items that are the result of combining the items emitted by the source
* Observables by means of the given aggregation function
* @see <a href="https://github.com/Netflix/RxJava/wiki/Combining-Observables#wiki-combinelatest">RxJava Wiki: combineLatest()</a>
*/
@SuppressWarnings("unchecked")
public static final <T1, T2, R> Observable<R> combineLatest(Observable<? extends T1> o1, Observable<? extends T2> o2, Func2<? super T1, ? super T2, ? extends R> combineFunction) {
return combineLatest(Arrays.asList(o1, o2), Functions.fromFunc(combineFunction));
}
/**
* Combines three source Observables by emitting an item that aggregates the latest values of each of the
* source Observables each time an item is received from any of the source Observables, where this
* aggregation is defined by a specified function.
* <p>
* <img width="640" height="380" src="https://raw.github.com/wiki/Netflix/RxJava/images/rx-operators/combineLatest.png">
* <p>
* {@code combineLatest} does not operate by default on a particular {@link Scheduler}.
*
* @param o1
* the first source Observable
* @param o2
* the second source Observable
* @param o3
* the third source Observable
* @param combineFunction
* the aggregation function used to combine the items emitted by the source Observables
* @return an Observable that emits items that are the result of combining the items emitted by the source
* Observables by means of the given aggregation function
* @see <a href="https://github.com/Netflix/RxJava/wiki/Combining-Observables#wiki-combinelatest">RxJava Wiki: combineLatest()</a>
*/
@SuppressWarnings("unchecked")
public static final <T1, T2, T3, R> Observable<R> combineLatest(Observable<? extends T1> o1, Observable<? extends T2> o2, Observable<? extends T3> o3, Func3<? super T1, ? super T2, ? super T3, ? extends R> combineFunction) {
return combineLatest(Arrays.asList(o1, o2, o3), Functions.fromFunc(combineFunction));
}
/**
* Combines four source Observables by emitting an item that aggregates the latest values of each of the
* source Observables each time an item is received from any of the source Observables, where this
* aggregation is defined by a specified function.
* <p>
* <img width="640" height="380" src="https://raw.github.com/wiki/Netflix/RxJava/images/rx-operators/combineLatest.png">
* <p>
* {@code combineLatest} does not operate by default on a particular {@link Scheduler}.
*
* @param o1
* the first source Observable
* @param o2
* the second source Observable
* @param o3
* the third source Observable
* @param o4
* the fourth source Observable
* @param combineFunction
* the aggregation function used to combine the items emitted by the source Observables
* @return an Observable that emits items that are the result of combining the items emitted by the source
* Observables by means of the given aggregation function
* @see <a href="https://github.com/Netflix/RxJava/wiki/Combining-Observables#wiki-combinelatest">RxJava Wiki: combineLatest()</a>
*/
@SuppressWarnings("unchecked")
public static final <T1, T2, T3, T4, R> Observable<R> combineLatest(Observable<? extends T1> o1, Observable<? extends T2> o2, Observable<? extends T3> o3, Observable<? extends T4> o4,
Func4<? super T1, ? super T2, ? super T3, ? super T4, ? extends R> combineFunction) {
return combineLatest(Arrays.asList(o1, o2, o3, o4), Functions.fromFunc(combineFunction));
}
/**
* Combines five source Observables by emitting an item that aggregates the latest values of each of the
* source Observables each time an item is received from any of the source Observables, where this
* aggregation is defined by a specified function.
* <p>
* <img width="640" height="380" src="https://raw.github.com/wiki/Netflix/RxJava/images/rx-operators/combineLatest.png">
* <p>
* {@code combineLatest} does not operate by default on a particular {@link Scheduler}.
*
* @param o1
* the first source Observable
* @param o2
* the second source Observable
* @param o3
* the third source Observable
* @param o4
* the fourth source Observable
* @param o5
* the fifth source Observable
* @param combineFunction
* the aggregation function used to combine the items emitted by the source Observables
* @return an Observable that emits items that are the result of combining the items emitted by the source
* Observables by means of the given aggregation function
* @see <a href="https://github.com/Netflix/RxJava/wiki/Combining-Observables#wiki-combinelatest">RxJava Wiki: combineLatest()</a>
*/
@SuppressWarnings("unchecked")
public static final <T1, T2, T3, T4, T5, R> Observable<R> combineLatest(Observable<? extends T1> o1, Observable<? extends T2> o2, Observable<? extends T3> o3, Observable<? extends T4> o4, Observable<? extends T5> o5,
Func5<? super T1, ? super T2, ? super T3, ? super T4, ? super T5, ? extends R> combineFunction) {
return combineLatest(Arrays.asList(o1, o2, o3, o4, o5), Functions.fromFunc(combineFunction));
}
/**
* Combines six source Observables by emitting an item that aggregates the latest values of each of the
* source Observables each time an item is received from any of the source Observables, where this
* aggregation is defined by a specified function.
* <p>
* <img width="640" height="380" src="https://raw.github.com/wiki/Netflix/RxJava/images/rx-operators/combineLatest.png">
* <p>
* {@code combineLatest} does not operate by default on a particular {@link Scheduler}.
*
* @param o1
* the first source Observable
* @param o2
* the second source Observable
* @param o3
* the third source Observable
* @param o4
* the fourth source Observable
* @param o5
* the fifth source Observable
* @param o6
* the sixth source Observable
* @param combineFunction
* the aggregation function used to combine the items emitted by the source Observables
* @return an Observable that emits items that are the result of combining the items emitted by the source
* Observables by means of the given aggregation function
* @see <a href="https://github.com/Netflix/RxJava/wiki/Combining-Observables#wiki-combinelatest">RxJava Wiki: combineLatest()</a>
*/
@SuppressWarnings("unchecked")
public static final <T1, T2, T3, T4, T5, T6, R> Observable<R> combineLatest(Observable<? extends T1> o1, Observable<? extends T2> o2, Observable<? extends T3> o3, Observable<? extends T4> o4, Observable<? extends T5> o5, Observable<? extends T6> o6,
Func6<? super T1, ? super T2, ? super T3, ? super T4, ? super T5, ? super T6, ? extends R> combineFunction) {
return combineLatest(Arrays.asList(o1, o2, o3, o4, o5, o6), Functions.fromFunc(combineFunction));
}
/**
* Combines seven source Observables by emitting an item that aggregates the latest values of each of the
* source Observables each time an item is received from any of the source Observables, where this
* aggregation is defined by a specified function.
* <p>
* <img width="640" height="380" src="https://raw.github.com/wiki/Netflix/RxJava/images/rx-operators/combineLatest.png">
* <p>
* {@code combineLatest} does not operate by default on a particular {@link Scheduler}.
*
* @param o1
* the first source Observable
* @param o2
* the second source Observable
* @param o3
* the third source Observable
* @param o4
* the fourth source Observable
* @param o5
* the fifth source Observable
* @param o6
* the sixth source Observable
* @param o7
* the seventh source Observable
* @param combineFunction
* the aggregation function used to combine the items emitted by the source Observables
* @return an Observable that emits items that are the result of combining the items emitted by the source
* Observables by means of the given aggregation function
* @see <a href="https://github.com/Netflix/RxJava/wiki/Combining-Observables#wiki-combinelatest">RxJava Wiki: combineLatest()</a>
*/
@SuppressWarnings("unchecked")
public static final <T1, T2, T3, T4, T5, T6, T7, R> Observable<R> combineLatest(Observable<? extends T1> o1, Observable<? extends T2> o2, Observable<? extends T3> o3, Observable<? extends T4> o4, Observable<? extends T5> o5, Observable<? extends T6> o6, Observable<? extends T7> o7,
Func7<? super T1, ? super T2, ? super T3, ? super T4, ? super T5, ? super T6, ? super T7, ? extends R> combineFunction) {
return combineLatest(Arrays.asList(o1, o2, o3, o4, o5, o6, o7), Functions.fromFunc(combineFunction));
}
/**
* Combines eight source Observables by emitting an item that aggregates the latest values of each of the
* source Observables each time an item is received from any of the source Observables, where this
* aggregation is defined by a specified function.
* <p>
* <img width="640" height="380" src="https://raw.github.com/wiki/Netflix/RxJava/images/rx-operators/combineLatest.png">
* <p>
* {@code combineLatest} does not operate by default on a particular {@link Scheduler}.
*
* @param o1
* the first source Observable
* @param o2
* the second source Observable
* @param o3
* the third source Observable
* @param o4
* the fourth source Observable
* @param o5
* the fifth source Observable
* @param o6
* the sixth source Observable
* @param o7
* the seventh source Observable
* @param o8
* the eighth source Observable
* @param combineFunction
* the aggregation function used to combine the items emitted by the source Observables
* @return an Observable that emits items that are the result of combining the items emitted by the source
* Observables by means of the given aggregation function
* @see <a href="https://github.com/Netflix/RxJava/wiki/Combining-Observables#wiki-combinelatest">RxJava Wiki: combineLatest()</a>
*/
@SuppressWarnings("unchecked")
public static final <T1, T2, T3, T4, T5, T6, T7, T8, R> Observable<R> combineLatest(Observable<? extends T1> o1, Observable<? extends T2> o2, Observable<? extends T3> o3, Observable<? extends T4> o4, Observable<? extends T5> o5, Observable<? extends T6> o6, Observable<? extends T7> o7, Observable<? extends T8> o8,
Func8<? super T1, ? super T2, ? super T3, ? super T4, ? super T5, ? super T6, ? super T7, ? super T8, ? extends R> combineFunction) {
return combineLatest(Arrays.asList(o1, o2, o3, o4, o5, o6, o7, o8), Functions.fromFunc(combineFunction));
}
/**
* Combines nine source Observables by emitting an item that aggregates the latest values of each of the
* source Observables each time an item is received from any of the source Observables, where this
* aggregation is defined by a specified function.
* <p>
* <img width="640" height="380" src="https://raw.github.com/wiki/Netflix/RxJava/images/rx-operators/combineLatest.png">
* <p>
* {@code combineLatest} does not operate by default on a particular {@link Scheduler}.
*
* @param o1
* the first source Observable
* @param o2
* the second source Observable
* @param o3
* the third source Observable
* @param o4
* the fourth source Observable
* @param o5
* the fifth source Observable
* @param o6
* the sixth source Observable
* @param o7
* the seventh source Observable
* @param o8
* the eighth source Observable
* @param o9
* the ninth source Observable
* @param combineFunction
* the aggregation function used to combine the items emitted by the source Observables
* @return an Observable that emits items that are the result of combining the items emitted by the source
* Observables by means of the given aggregation function
* @see <a href="https://github.com/Netflix/RxJava/wiki/Combining-Observables#wiki-combinelatest">RxJava Wiki: combineLatest()</a>
*/
@SuppressWarnings("unchecked")
public static final <T1, T2, T3, T4, T5, T6, T7, T8, T9, R> Observable<R> combineLatest(Observable<? extends T1> o1, Observable<? extends T2> o2, Observable<? extends T3> o3, Observable<? extends T4> o4, Observable<? extends T5> o5, Observable<? extends T6> o6, Observable<? extends T7> o7, Observable<? extends T8> o8,
Observable<? extends T9> o9,
Func9<? super T1, ? super T2, ? super T3, ? super T4, ? super T5, ? super T6, ? super T7, ? super T8, ? super T9, ? extends R> combineFunction) {
return combineLatest(Arrays.asList(o1, o2, o3, o4, o5, o6, o7, o8, o9), Functions.fromFunc(combineFunction));
}
/**
* Combines a list of source Observables by emitting an item that aggregates the latest values of each of
* the source Observables each time an item is received from any of the source Observables, where this
* aggregation is defined by a specified function.
* <p>
* {@code combineLatest} does not operate by default on a particular {@link Scheduler}.
*
* @param <T>
* the common base type of source values
* @param <R>
* the result type
* @param sources
* the list of source Observables
* @param combineFunction
* the aggregation function used to combine the items emitted by the source Observables
* @return an Observable that emits items that are the result of combining the items emitted by the source
* Observables by means of the given aggregation function
* @see <a href="https://github.com/Netflix/RxJava/wiki/Combining-Observables#wiki-combinelatest">RxJava Wiki: combineLatest()</a>
*/
public static final <T, R> Observable<R> combineLatest(List<? extends Observable<? extends T>> sources, FuncN<? extends R> combineFunction) {
return create(new OnSubscribeCombineLatest<T, R>(sources, combineFunction));
}
/**
* Returns an Observable that emits the items emitted by each of the Observables emitted by the source
* Observable, one after the other, without interleaving them.
* <p>
* <img width="640" height="380" src="https://raw.github.com/wiki/Netflix/RxJava/images/rx-operators/concat.png">
* <p>
* {@code concat} does not operate by default on a particular {@link Scheduler}.
*
* @param observables
* an Observable that emits Observables
* @return an Observable that emits items all of the items emitted by the Observables emitted by
* {@code observables}, one after the other, without interleaving them
* @see <a href="https://github.com/Netflix/RxJava/wiki/Mathematical-and-Aggregate-Operators#wiki-concat">RxJava Wiki: concat()</a>
* @see <a href="http://msdn.microsoft.com/en-us/library/system.reactive.linq.observable.concat.aspx">MSDN: Observable.Concat</a>
*/
public final static <T> Observable<T> concat(Observable<? extends Observable<? extends T>> observables) {
return observables.lift(new OperatorConcat<T>());
}
/**
* Returns an Observable that emits the items emitted by two Observables, one after the other, without
* interleaving them.
* <p>
* <img width="640" height="380" src="https://raw.github.com/wiki/Netflix/RxJava/images/rx-operators/concat.png">
* <p>
* {@code concat} does not operate by default on a particular {@link Scheduler}.
*
* @param t1
* an Observable to be concatenated
* @param t2
* an Observable to be concatenated
* @return an Observable that emits items emitted by the two source Observables, one after the other,
* without interleaving them
* @see <a href="https://github.com/Netflix/RxJava/wiki/Mathematical-and-Aggregate-Operators#wiki-concat">RxJava Wiki: concat()</a>
* @see <a href="http://msdn.microsoft.com/en-us/library/system.reactive.linq.observable.concat.aspx">MSDN: Observable.Concat</a>
*/
public final static <T> Observable<T> concat(Observable<? extends T> t1, Observable<? extends T> t2) {
return concat(from(t1, t2));
}
/**
* Returns an Observable that emits the items emitted by three Observables, one after the other, without
* interleaving them.
* <p>
* <img width="640" height="380" src="https://raw.github.com/wiki/Netflix/RxJava/images/rx-operators/concat.png">
* <p>
* {@code concat} does not operate by default on a particular {@link Scheduler}.
*
* @param t1
* an Observable to be concatenated
* @param t2
* an Observable to be concatenated
* @param t3
* an Observable to be concatenated
* @return an Observable that emits items emitted by the three source Observables, one after the other,
* without interleaving them
* @see <a href="https://github.com/Netflix/RxJava/wiki/Mathematical-and-Aggregate-Operators#wiki-concat">RxJava Wiki: concat()</a>
* @see <a href="http://msdn.microsoft.com/en-us/library/system.reactive.linq.observable.concat.aspx">MSDN: Observable.Concat</a>
*/
public final static <T> Observable<T> concat(Observable<? extends T> t1, Observable<? extends T> t2, Observable<? extends T> t3) {
return concat(from(t1, t2, t3));
}
/**
* Returns an Observable that emits the items emitted by four Observables, one after the other, without
* interleaving them.
* <p>
* <img width="640" height="380" src="https://raw.github.com/wiki/Netflix/RxJava/images/rx-operators/concat.png">
* <p>
* {@code concat} does not operate by default on a particular {@link Scheduler}.
*
* @param t1
* an Observable to be concatenated
* @param t2
* an Observable to be concatenated
* @param t3
* an Observable to be concatenated
* @param t4
* an Observable to be concatenated
* @return an Observable that emits items emitted by the four source Observables, one after the other,
* without interleaving them
* @see <a href="https://github.com/Netflix/RxJava/wiki/Mathematical-and-Aggregate-Operators#wiki-concat">RxJava Wiki: concat()</a>
* @see <a href="http://msdn.microsoft.com/en-us/library/system.reactive.linq.observable.concat.aspx">MSDN: Observable.Concat</a>
*/
public final static <T> Observable<T> concat(Observable<? extends T> t1, Observable<? extends T> t2, Observable<? extends T> t3, Observable<? extends T> t4) {
return concat(from(t1, t2, t3, t4));
}
/**
* Returns an Observable that emits the items emitted by five Observables, one after the other, without
* interleaving them.
* <p>
* <img width="640" height="380" src="https://raw.github.com/wiki/Netflix/RxJava/images/rx-operators/concat.png">
* <p>
* {@code concat} does not operate by default on a particular {@link Scheduler}.
*
* @param t1
* an Observable to be concatenated
* @param t2
* an Observable to be concatenated
* @param t3
* an Observable to be concatenated
* @param t4
* an Observable to be concatenated
* @param t5
* an Observable to be concatenated
* @return an Observable that emits items emitted by the five source Observables, one after the other,
* without interleaving them
* @see <a href="https://github.com/Netflix/RxJava/wiki/Mathematical-and-Aggregate-Operators#wiki-concat">RxJava Wiki: concat()</a>
* @see <a href="http://msdn.microsoft.com/en-us/library/system.reactive.linq.observable.concat.aspx">MSDN: Observable.Concat</a>
*/
public final static <T> Observable<T> concat(Observable<? extends T> t1, Observable<? extends T> t2, Observable<? extends T> t3, Observable<? extends T> t4, Observable<? extends T> t5) {
return concat(from(t1, t2, t3, t4, t5));
}
/**
* Returns an Observable that emits the items emitted by six Observables, one after the other, without
* interleaving them.
* <p>
* <img width="640" height="380" src="https://raw.github.com/wiki/Netflix/RxJava/images/rx-operators/concat.png">
* <p>
* {@code concat} does not operate by default on a particular {@link Scheduler}.
*
* @param t1
* an Observable to be concatenated
* @param t2
* an Observable to be concatenated
* @param t3
* an Observable to be concatenated
* @param t4
* an Observable to be concatenated
* @param t5
* an Observable to be concatenated
* @param t6
* an Observable to be concatenated
* @return an Observable that emits items emitted by the six source Observables, one after the other,
* without interleaving them
* @see <a href="https://github.com/Netflix/RxJava/wiki/Mathematical-and-Aggregate-Operators#wiki-concat">RxJava Wiki: concat()</a>
* @see <a href="http://msdn.microsoft.com/en-us/library/system.reactive.linq.observable.concat.aspx">MSDN: Observable.Concat</a>
*/
public final static <T> Observable<T> concat(Observable<? extends T> t1, Observable<? extends T> t2, Observable<? extends T> t3, Observable<? extends T> t4, Observable<? extends T> t5, Observable<? extends T> t6) {
return concat(from(t1, t2, t3, t4, t5, t6));
}
/**
* Returns an Observable that emits the items emitted by seven Observables, one after the other, without
* interleaving them.
* <p>
* <img width="640" height="380" src="https://raw.github.com/wiki/Netflix/RxJava/images/rx-operators/concat.png">
* <p>
* {@code concat} does not operate by default on a particular {@link Scheduler}.
*
* @param t1
* an Observable to be concatenated
* @param t2
* an Observable to be concatenated
* @param t3
* an Observable to be concatenated
* @param t4
* an Observable to be concatenated
* @param t5
* an Observable to be concatenated
* @param t6
* an Observable to be concatenated
* @param t7
* an Observable to be concatenated
* @return an Observable that emits items emitted by the seven source Observables, one after the other,
* without interleaving them
* @see <a href="https://github.com/Netflix/RxJava/wiki/Mathematical-and-Aggregate-Operators#wiki-concat">RxJava Wiki: concat()</a>
* @see <a href="http://msdn.microsoft.com/en-us/library/system.reactive.linq.observable.concat.aspx">MSDN: Observable.Concat</a>
*/
public final static <T> Observable<T> concat(Observable<? extends T> t1, Observable<? extends T> t2, Observable<? extends T> t3, Observable<? extends T> t4, Observable<? extends T> t5, Observable<? extends T> t6, Observable<? extends T> t7) {
return concat(from(t1, t2, t3, t4, t5, t6, t7));
}
/**
* Returns an Observable that emits the items emitted by eight Observables, one after the other, without
* interleaving them.
* <p>
* <img width="640" height="380" src="https://raw.github.com/wiki/Netflix/RxJava/images/rx-operators/concat.png">
* <p>
* {@code concat} does not operate by default on a particular {@link Scheduler}.
*
* @param t1
* an Observable to be concatenated
* @param t2
* an Observable to be concatenated
* @param t3
* an Observable to be concatenated
* @param t4
* an Observable to be concatenated
* @param t5
* an Observable to be concatenated
* @param t6
* an Observable to be concatenated
* @param t7
* an Observable to be concatenated
* @param t8
* an Observable to be concatenated
* @return an Observable that emits items emitted by the eight source Observables, one after the other,
* without interleaving them
* @see <a href="https://github.com/Netflix/RxJava/wiki/Mathematical-and-Aggregate-Operators#wiki-concat">RxJava Wiki: concat()</a>
* @see <a href="http://msdn.microsoft.com/en-us/library/system.reactive.linq.observable.concat.aspx">MSDN: Observable.Concat</a>
*/
public final static <T> Observable<T> concat(Observable<? extends T> t1, Observable<? extends T> t2, Observable<? extends T> t3, Observable<? extends T> t4, Observable<? extends T> t5, Observable<? extends T> t6, Observable<? extends T> t7, Observable<? extends T> t8) {
return concat(from(t1, t2, t3, t4, t5, t6, t7, t8));
}
/**
* Returns an Observable that emits the items emitted by nine Observables, one after the other, without
* interleaving them.
* <p>
* <img width="640" height="380" src="https://raw.github.com/wiki/Netflix/RxJava/images/rx-operators/concat.png">
* <p>
* {@code concat} does not operate by default on a particular {@link Scheduler}.
*
* @param t1
* an Observable to be concatenated
* @param t2
* an Observable to be concatenated
* @param t3
* an Observable to be concatenated
* @param t4
* an Observable to be concatenated
* @param t5
* an Observable to be concatenated
* @param t6
* an Observable to be concatenated
* @param t7
* an Observable to be concatenated
* @param t8
* an Observable to be concatenated
* @param t9
* an Observable to be concatenated
* @return an Observable that emits items emitted by the nine source Observables, one after the other,
* without interleaving them
* @see <a href="https://github.com/Netflix/RxJava/wiki/Mathematical-and-Aggregate-Operators#wiki-concat">RxJava Wiki: concat()</a>
* @see <a href="http://msdn.microsoft.com/en-us/library/system.reactive.linq.observable.concat.aspx">MSDN: Observable.Concat</a>
*/
public final static <T> Observable<T> concat(Observable<? extends T> t1, Observable<? extends T> t2, Observable<? extends T> t3, Observable<? extends T> t4, Observable<? extends T> t5, Observable<? extends T> t6, Observable<? extends T> t7, Observable<? extends T> t8, Observable<? extends T> t9) {
return concat(from(t1, t2, t3, t4, t5, t6, t7, t8, t9));
}
/**
* Returns an Observable that calls an Observable factory to create an Observable for each new Observer
* that subscribes. That is, for each subscriber, the actual Observable that subscriber observes is
* determined by the factory function.
* <p>
* <img width="640" height="340" src="https://raw.github.com/wiki/Netflix/RxJava/images/rx-operators/defer.png">
* <p>
* The defer Observer allows you to defer or delay emitting items from an Observable until such time as an
* Observer subscribes to the Observable. This allows an {@link Observer} to easily obtain updates or a
* refreshed version of the sequence.
* <p>
* {@code defer} does not operate by default on a particular {@link Scheduler}.
*
* @param observableFactory
* the Observable factory function to invoke for each {@link Observer} that subscribes to the
* resulting Observable
* @param <T>
* the type of the items emitted by the Observable
* @return an Observable whose {@link Observer}s' subscriptions trigger an invocation of the given
* Observable factory function
* @see <a href="https://github.com/Netflix/RxJava/wiki/Creating-Observables#wiki-defer">RxJava Wiki: defer()</a>
*/
public final static <T> Observable<T> defer(Func0<? extends Observable<? extends T>> observableFactory) {
return create(new OnSubscribeDefer<T>(observableFactory));
}
/**
* Returns an Observable that emits no items to the {@link Observer} and immediately invokes its
* {@link Observer#onCompleted onCompleted} method.
* <p>
* <img width="640" height="190" src="https://raw.github.com/wiki/Netflix/RxJava/images/rx-operators/empty.png">
* <p>
* {@code empty} does not operate by default on a particular {@link Scheduler}.
*
* @param <T>
* the type of the items (ostensibly) emitted by the Observable
* @return an Observable that emits no items to the {@link Observer} but immediately invokes the
* {@link Observer}'s {@link Observer#onCompleted() onCompleted} method
* @see <a href="https://github.com/Netflix/RxJava/wiki/Creating-Observables#wiki-empty-error-and-never">RxJava Wiki: empty()</a>
* @see <a href="http://msdn.microsoft.com/en-us/library/hh229670.aspx">MSDN: Observable.Empty</a>
*/
public final static <T> Observable<T> empty() {
return from(new ArrayList<T>());
}
/**
* Returns an Observable that emits no items to the {@link Observer} and immediately invokes its
* {@link Observer#onCompleted onCompleted} method on the specified Scheduler.
* <p>
* <img width="640" height="190" src="https://raw.github.com/wiki/Netflix/RxJava/images/rx-operators/empty.s.png">
*
* @param scheduler
* the Scheduler to use to call the {@link Observer#onCompleted onCompleted} method
* @param <T>
* the type of the items (ostensibly) emitted by the Observable
* @return an Observable that emits no items to the {@link Observer} but immediately invokes the
* {@link Observer}'s {@link Observer#onCompleted() onCompleted} method with the specified
* {@code scheduler}
* @see <a href="https://github.com/Netflix/RxJava/wiki/Creating-Observables#wiki-empty-error-and-never">RxJava Wiki: empty()</a>
* @see <a href="http://msdn.microsoft.com/en-us/library/hh229066.aspx">MSDN: Observable.Empty Method (IScheduler)</a>
*/
public final static <T> Observable<T> empty(Scheduler scheduler) {
return Observable.<T> empty().subscribeOn(scheduler);
}
/**
* Returns an Observable that invokes an {@link Observer}'s {@link Observer#onError onError} method when the
* Observer subscribes to it.
* <p>