com.aol.cyclops.types

Interface OnEmptySwitch<T,R>

Type Parameters:

T - Data type of element(s) stored in this container

R - Data type of element(s) stored in the container to be used if this container is empty

All Known Subinterfaces:

DequeX<T>, LazyFutureStream<U>, ListX<T>, MapX<K,V>, PBagX<T>, PMapX<K,V>, POrderedSetX<T>, PQueueX<T>, PSetX<T>, PStackX<T>, PVectorX<T>, QueueX<T>, ReactiveSeq<T>, SetX<T>, SortedSetX<T>

All Known Implementing Classes:

DequeXImpl, LazyFutureStreamImpl, ListXImpl, MapXImpl, MaterializedList, PBagXImpl, PMapXImpl, POrderedSetXImpl, PQueueXImpl, PSetXImpl, PStackXImpl, PVectorXImpl, QueueXImpl, ReactiveSeqImpl, SetXImpl, SortedSetXImpl

public interface OnEmptySwitch<T,R>

Represents a container that may be empty for which we can switch a container with another value

Method Summary

Modifier and Type	Method and Description
OnEmptySwitch<T,R>	onEmptySwitch(java.util.function.Supplier<? extends R> supplier) Switch to container created by provided Supplier, if current Container empty

Method Detail

onEmptySwitch

OnEmptySwitch<T,R> onEmptySwitch(java.util.function.Supplier<? extends R> supplier)

Switch to container created by provided Supplier, if current Container empty

  
     ListX.empty().onEmptySwitch(()->ListX.of(1));
  
 

Parameters:

supplier - to create replacement container

Returns:

Either this container or if empty, an alternative returned by the provided supplier