io.reactivex.rxjava3.core

Interface ObservableOperator<Downstream,Upstream>

Type Parameters:

Downstream - the value type of the downstream

Upstream - the value type of the upstream

public interface ObservableOperator<Downstream,Upstream>

Interface to map/wrap a downstream observer to an upstream observer.

Method Summary

Modifier and Type	Method and Description
Observer<? super Upstream>	apply(Observer<? super Downstream> observer) Applies a function to the child Observer and returns a new parent Observer.

Method Detail

apply

@NonNull
Observer<? super Upstream> apply(@NonNull
                                          Observer<? super Downstream> observer)
                                   throws Exception

Applies a function to the child Observer and returns a new parent Observer.

Parameters:

observer - the child Observer instance

Returns:

the parent Observer instance

Throws:

Exception - on failure