Package io.reactivex.rxjava3.operators
Interface ScalarSupplier<T>
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- Type Parameters:
T
- the scalar value type held by the implementing reactive type
- All Superinterfaces:
Supplier<T>
- All Known Implementing Classes:
FlowableEmpty
,FlowableJust
,MaybeEmpty
,MaybeJust
,ObservableEmpty
,ObservableJust
- Functional Interface:
- This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.
@FunctionalInterface public interface ScalarSupplier<@NonNull T> extends Supplier<T>
A marker interface indicating that a scalar, constant value is held by the implementing reactive type which can be safely extracted during assembly time can be used for optimization.Implementors of
get()
should not throw any exception.Design note: the interface extends
Supplier
because if a scalar is safe to extract during assembly time, it is also safe to extract at subscription time or later. This allows optimizations to deal with such single-element sources uniformly.- Since:
- 3.1.1
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Method Summary
All Methods Instance Methods Abstract Methods Modifier and Type Method Description T
get()
Produces a value or throws an exception.
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