com.aol.cyclops2.types

Interface OnEmpty<T>

Type Parameters:

T - container type

All Known Subinterfaces:

AnyMSeq<W,T>, CollectionX<T>, DequeX<T>, ExtendedTraversable<T>, FluentCollectionX<T>, FluentSequenceX<T>, FoldableTransformerSeq<W,T>, FoldableTraversable<T>, FutureStream<U>, LazyFluentCollectionX<T>, ListX<T>, MapX<K,V>, MutableCollectionX<T>, MutableSequenceX<T>, PBagX<T>, PersistentCollectionX<T>, PMapX<K,V>, POrderedSetX<T>, PQueueX<T>, PSetX<T>, PStackX<T>, PVectorX<T>, QueueX<T>, ReactiveSeq<T>, SetX<T>, SortedSetX<T>, Streamable<T>, TransformerSeq<W,T>, Traversable<T>

All Known Implementing Classes:

AbstractLazyMutableCollection, AbstractLazyPersistentCollection, CollectionXImpl, LazyDequeX, LazyListX, LazyPBagX, LazyPOrderedSetX, LazyPQueueX, LazyPSetX, LazyPStackX, LazyPVectorX, LazyQueueX, LazySetX, LazySortedSetX, ListT, MapXImpl, PMapXImpl

public interface OnEmpty<T>

Represents a container that may be empty

Method Summary

Modifier and Type	Method and Description
OnEmpty<T>	onEmpty(T value) If this Container instance is empty, create a new instance containing the provided value
OnEmpty<T>	onEmptyGet(java.util.function.Supplier<? extends T> supplier) If this Container instance is empty, create a new instance containing the value returned from the provided Supplier
<X extends java.lang.Throwable> OnEmpty<T>	onEmptyThrow(java.util.function.Supplier<? extends X> supplier) If this container instance is empty, throw the exception returned by the provided Supplier

Method Detail

onEmpty

OnEmpty<T> onEmpty(T value)

If this Container instance is empty, create a new instance containing the provided value

Parameters:

value -

Returns:

New instance containing value if container is empty, otherwise returns this container

onEmptyGet

OnEmpty<T> onEmptyGet(java.util.function.Supplier<? extends T> supplier)

If this Container instance is empty, create a new instance containing the value returned from the provided Supplier

Parameters:

supplier - to determine new value for container

Returns:

New Container with value if this is empty, otherwise this container

onEmptyThrow

<X extends java.lang.Throwable> OnEmpty<T> onEmptyThrow(java.util.function.Supplier<? extends X> supplier)

If this container instance is empty, throw the exception returned by the provided Supplier

Parameters:

supplier - to create exception from

Returns:

Throw exception if empty, otherwise this container