/**
* Copyright (c) 2016-present, RxJava Contributors.
*
* 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 io.reactivex.internal.operators.observable;
import io.reactivex.internal.functions.
ObjectHelper;
import java.util.
Iterator;
import io.reactivex.*;
import io.reactivex.disposables.
Disposable;
import io.reactivex.exceptions.
Exceptions;
import io.reactivex.functions.
BiFunction;
import io.reactivex.internal.disposables.*;
import io.reactivex.plugins.
RxJavaPlugins;
public final class
ObservableZipIterable<T, U, V> extends
Observable<V> {
final
Observable<? extends T>
source;
final
Iterable<U>
other;
final
BiFunction<? super T, ? super U, ? extends V>
zipper;
public
ObservableZipIterable(
Observable<? extends T>
source,
Iterable<U>
other,
BiFunction<? super T, ? super U, ? extends V>
zipper) {
this.
source =
source;
this.
other =
other;
this.
zipper =
zipper;
}
@
Override
public void
subscribeActual(
Observer<? super V>
t) {
Iterator<U>
it;
try {
it =
ObjectHelper.
requireNonNull(
other.
iterator(), "The iterator returned by other is null");
} catch (
Throwable e) {
Exceptions.
throwIfFatal(
e);
EmptyDisposable.
error(
e,
t);
return;
}
boolean
b;
try {
b =
it.
hasNext();
} catch (
Throwable e) {
Exceptions.
throwIfFatal(
e);
EmptyDisposable.
error(
e,
t);
return;
}
if (!
b) {
EmptyDisposable.
complete(
t);
return;
}
source.
subscribe(new
ZipIterableObserver<T, U, V>(
t,
it,
zipper));
}
static final class
ZipIterableObserver<T, U, V> implements
Observer<T>,
Disposable {
final
Observer<? super V>
downstream;
final
Iterator<U>
iterator;
final
BiFunction<? super T, ? super U, ? extends V>
zipper;
Disposable upstream;
boolean
done;
ZipIterableObserver(
Observer<? super V>
actual,
Iterator<U>
iterator,
BiFunction<? super T, ? super U, ? extends V>
zipper) {
this.
downstream =
actual;
this.
iterator =
iterator;
this.
zipper =
zipper;
}
@
Override
public void
onSubscribe(
Disposable d) {
if (
DisposableHelper.
validate(this.
upstream,
d)) {
this.
upstream =
d;
downstream.
onSubscribe(this);
}
}
@
Override
public void
dispose() {
upstream.
dispose();
}
@
Override
public boolean
isDisposed() {
return
upstream.
isDisposed();
}
@
Override
public void
onNext(T
t) {
if (
done) {
return;
}
U
u;
try {
u =
ObjectHelper.
requireNonNull(
iterator.
next(), "The iterator returned a null value");
} catch (
Throwable e) {
Exceptions.
throwIfFatal(
e);
error(
e);
return;
}
V
v;
try {
v =
ObjectHelper.
requireNonNull(
zipper.
apply(
t,
u), "The zipper function returned a null value");
} catch (
Throwable e) {
Exceptions.
throwIfFatal(
e);
error(
e);
return;
}
downstream.
onNext(
v);
boolean
b;
try {
b =
iterator.
hasNext();
} catch (
Throwable e) {
Exceptions.
throwIfFatal(
e);
error(
e);
return;
}
if (!
b) {
done = true;
upstream.
dispose();
downstream.
onComplete();
}
}
void
error(
Throwable e) {
done = true;
upstream.
dispose();
downstream.
onError(
e);
}
@
Override
public void
onError(
Throwable t) {
if (
done) {
RxJavaPlugins.
onError(
t);
return;
}
done = true;
downstream.
onError(
t);
}
@
Override
public void
onComplete() {
if (
done) {
return;
}
done = true;
downstream.
onComplete();
}
}
}