Interface FuseToObservable<T>

Type Parameters:
T - the value type
All Known Implementing Classes:
ObservableAllSingle, ObservableAnySingle, ObservableCollectSingle, ObservableCollectWithCollectorSingle, ObservableCountSingle, ObservableElementAtMaybe, ObservableElementAtSingle, ObservableFlatMapCompletableCompletable, ObservableIgnoreElementsCompletable, ObservableSequenceEqualSingle, ObservableToListSingle

public interface FuseToObservable<@NonNull T>
Interface indicating a operator implementation can be macro-fused back to Observable in case the operator goes from Observable to some other reactive type and then the sequence calls for toObservable again:
 
 Single<Integer> single = Observable.range(1, 10).reduce((a, b) -> a + b);
 Observable<Integer> observable = single.toObservable();
 
 
The Single.toObservable() will check for this interface and call the fuseToObservable() to return an Observable which could be the Observable-specific implementation of reduce(BiFunction).

This causes a slight overhead in assembly time (1 instanceof check, 1 operator allocation and 1 dropped operator) but does not incur the conversion overhead at runtime.

  • Method Summary

    Modifier and Type
    Method
    Description
    Returns a (direct) Observable for the operator.
  • Method Details

    • fuseToObservable

      @NonNull @NonNull Observable<T> fuseToObservable()
      Returns a (direct) Observable for the operator.

      The implementation should handle the necessary RxJavaPlugins wrapping.

      Returns:
      the Observable instance