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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.internal.operators;

import rx.*;
import rx.Observable.OnSubscribe;
import rx.exceptions.*;
import rx.functions.Func1;
import rx.plugins.RxJavaHooks;

/**
 * Applies a function of your choosing to every item emitted by an {@code Observable}, and emits the results of
 * this transformation as a new {@code Observable}.
 * 

* * * @param the input value type * @param the return value type */ public final class OnSubscribeMap implements OnSubscribe { final Observable source; final Func1 transformer; public OnSubscribeMap(Observable source, Func1 transformer) { this.source = source; this.transformer = transformer; } @Override public void call(final Subscriber o) { MapSubscriber parent = new MapSubscriber(o, transformer); o.add(parent); source.unsafeSubscribe(parent); } static final class MapSubscriber extends Subscriber { final Subscriber actual; final Func1 mapper; boolean done; public MapSubscriber(Subscriber actual, Func1 mapper) { this.actual = actual; this.mapper = mapper; } @Override public void onNext(T t) { R result; try { result = mapper.call(t); } catch (Throwable ex) { Exceptions.throwIfFatal(ex); unsubscribe(); onError(OnErrorThrowable.addValueAsLastCause(ex, t)); return; } actual.onNext(result); } @Override public void onError(Throwable e) { if (done) { RxJavaHooks.onError(e); return; } done = true; actual.onError(e); } @Override public void onCompleted() { if (done) { return; } actual.onCompleted(); } @Override public void setProducer(Producer p) { actual.setProducer(p); } } }





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