rx.internal.operators.OperatorZipIterable Maven / Gradle / Ivy
/**
* 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.internal.operators;
import java.util.Iterator;
import rx.Observable.Operator;
import rx.exceptions.Exceptions;
import rx.Subscriber;
import rx.functions.Func2;
import rx.observers.Subscribers;
public final class OperatorZipIterable implements Operator {
final Iterable iterable;
final Func2 zipFunction;
public OperatorZipIterable(Iterable iterable, Func2 zipFunction) {
this.iterable = iterable;
this.zipFunction = zipFunction;
}
@Override
public Subscriber call(final Subscriber subscriber) {
final Iterator iterator = iterable.iterator();
try {
if (!iterator.hasNext()) {
subscriber.onCompleted();
return Subscribers.empty();
}
} catch (Throwable e) {
Exceptions.throwOrReport(e, subscriber);
return Subscribers.empty();
}
return new Subscriber(subscriber) {
boolean done;
@Override
public void onCompleted() {
if (done) {
return;
}
done = true;
subscriber.onCompleted();
}
@Override
public void onError(Throwable e) {
if (done) {
Exceptions.throwIfFatal(e);
return;
}
done = true;
subscriber.onError(e);
}
@Override
public void onNext(T1 t) {
if (done) {
return;
}
try {
subscriber.onNext(zipFunction.call(t, iterator.next()));
if (!iterator.hasNext()) {
onCompleted();
}
} catch (Throwable e) {
Exceptions.throwOrReport(e, this);
}
}
};
}
}