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TaskObservable.java
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TaskObservable.java
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/*
* Copyright (C) 2015 8tory, 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.bolts2;
import java.util.concurrent.Callable;
import bolts.Task;
import io.reactivex.Observable;
/**
* Bolts2Rx
* Bolts.Task2Observable
* RxBolts
* RxTask
* BoltsObservable
* TaskObservable
*/
public class TaskObservable {
public static <R> Task<R> forTask(final Observable<R> obs){
return Task.callInBackground(() -> obs.blockingSingle()); // FIXME: null is not acceptable
}
public static <R> Observable<R> just(Task<R> task) {
return Observable.create(emitter -> {
task.continueWith(t -> {
if (emitter.isDisposed()) return null;
if (t.isCancelled()) {
// NOTICE: doOnUnsubscribe(() -> Observable.just(query) in outside
emitter.onComplete();
} else if (t.isFaulted()) {
Throwable error = t.getError();
emitter.onError(error);
} else {
R r = t.getResult();
if (r != null) emitter.onNext(r);
emitter.onComplete();
}
return null;
});
});
// TODO .doOnUnsubscribe(() -> task.setCancelled());
}
public static <R> Observable<R> just(Callable<Task<R>> task) {
return defer(task);
}
public static <R> Observable<R> defer(Callable<Task<R>> task) {
return Observable.defer(() -> just(task.call()));
}
}