/**
* 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.Observable.Operator;
import rx.Subscriber;
import rx.exceptions.OnErrorThrowable;
import rx.functions.Func1;
/**
* 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}.
* <p>
* <img width="640" height="305" src="https://raw.githubusercontent.com/wiki/Netflix/RxJava/images/rx-operators/map.png" alt="">
*/
public final class OperatorMap<T, R> implements Operator<R, T> {
private final Func1<? super T, ? extends R> transformer;
public OperatorMap(Func1<? super T, ? extends R> transformer) {
this.transformer = transformer;
}
@Override
public Subscriber<? super T> call(final Subscriber<? super R> o) {
return new Subscriber<T>(o) {
@Override
public void onCompleted() {
o.onCompleted();
}
@Override
public void onError(Throwable e) {
o.onError(e);
}
@Override
public void onNext(T t) {
try {
o.onNext(transformer.call(t));
} catch (Throwable e) {
onError(OnErrorThrowable.addValueAsLastCause(e, t));
}
}
};
}
}