public static <T0, T1, R> Func1<Observer<R>, Subscription> zip(
Observable<T0> w0, Observable<T1> w1, Func2<T0, T1, R> zipFunction) {
Aggregator<R> a = new Aggregator<R>(Functions.fromFunc(zipFunction));
a.addObserver(new ZipObserver<R, T0>(a, w0));
a.addObserver(new ZipObserver<R, T1>(a, w1));
return a;
}
@SuppressWarnings("unchecked")
public static <R> Func1<Observer<R>, Subscription> zip(
Collection<Observable<?>> ws, FuncN<R> zipFunction) {
Aggregator a = new Aggregator(zipFunction);
for (Observable w : ws) {
ZipObserver zipObserver = new ZipObserver(a, w);
a.addObserver(zipObserver);
}
return a;
}
@Override
public void onNext(T args) {
try {
a.next(this, args);
} catch (Exception e) {
onError(e);
}
}
@SuppressWarnings("unchecked")
/* mock calls don't do generics */
@Test
public void testAggregate3Types() {
FuncN<String> zipr = getConcatZipr();
/* create the aggregator which will execute the zip function when all Observables provide values */
Aggregator<String> a = new Aggregator<String>(zipr);
/* define a Observer to receive aggregated events */
Observer<String> aObserver = mock(Observer.class);
a.call(aObserver);
/* mock the Observable Observers that are 'pushing' data for us */
ZipObserver<String, String> r1 = mock(ZipObserver.class);
ZipObserver<String, Integer> r2 = mock(ZipObserver.class);
ZipObserver<String, int[]> r3 = mock(ZipObserver.class);
/* pretend we're starting up */
a.addObserver(r1);
a.addObserver(r2);
a.addObserver(r3);
/* simulate the Observables pushing data into the aggregator */
a.next(r1, "hello");
a.next(r2, 2);
a.next(r3, new int[] {5, 6, 7});
verify(aObserver, never()).onError(any(Exception.class));
verify(aObserver, never()).onCompleted();
verify(aObserver, times(1)).onNext("hello2[5, 6, 7]");
}
@SuppressWarnings("unchecked")
/* mock calls don't do generics */
@Test
public void testAggregatorUnsubscribe() {
FuncN<String> zipr = getConcatZipr();
/* create the aggregator which will execute the zip function when all Observables provide values */
Aggregator<String> a = new Aggregator<String>(zipr);
/* define a Observer to receive aggregated events */
Observer<String> aObserver = mock(Observer.class);
Subscription subscription = a.call(aObserver);
/* mock the Observable Observers that are 'pushing' data for us */
ZipObserver<String, String> r1 = mock(ZipObserver.class);
ZipObserver<String, String> r2 = mock(ZipObserver.class);
/* pretend we're starting up */
a.addObserver(r1);
a.addObserver(r2);
/* simulate the Observables pushing data into the aggregator */
a.next(r1, "hello");
a.next(r2, "world");
verify(aObserver, never()).onError(any(Exception.class));
verify(aObserver, never()).onCompleted();
verify(aObserver, times(1)).onNext("helloworld");
subscription.unsubscribe();
a.next(r1, "hello");
a.next(r2, "again");
verify(aObserver, times(0)).onError(any(Exception.class));
verify(aObserver, never()).onCompleted();
// we don't want to be called again after an error
verify(aObserver, times(0)).onNext("helloagain");
}
@SuppressWarnings("unchecked")
/* mock calls don't do generics */
@Test
public void testAggregatorEarlyCompletion() {
FuncN<String> zipr = getConcatZipr();
/* create the aggregator which will execute the zip function when all Observables provide values */
Aggregator<String> a = new Aggregator<String>(zipr);
/* define a Observer to receive aggregated events */
Observer<String> aObserver = mock(Observer.class);
a.call(aObserver);
/* mock the Observable Observers that are 'pushing' data for us */
ZipObserver<String, String> r1 = mock(ZipObserver.class);
ZipObserver<String, String> r2 = mock(ZipObserver.class);
/* pretend we're starting up */
a.addObserver(r1);
a.addObserver(r2);
/* simulate the Observables pushing data into the aggregator */
a.next(r1, "one");
a.next(r1, "two");
a.complete(r1);
a.next(r2, "A");
InOrder inOrder = inOrder(aObserver);
inOrder.verify(aObserver, never()).onError(any(Exception.class));
inOrder.verify(aObserver, never()).onCompleted();
inOrder.verify(aObserver, times(1)).onNext("oneA");
a.complete(r2);
inOrder.verify(aObserver, never()).onError(any(Exception.class));
inOrder.verify(aObserver, times(1)).onCompleted();
inOrder.verify(aObserver, never()).onNext(anyString());
}
@Override
public void onError(Exception e) {
a.error(this, e);
}
@Override
public void onCompleted() {
a.complete(this);
}