Streamable (Spring Data Core 2.7.17 API)

All Superinterfaces:

Iterable<T>, Supplier<Stream<T>>

All Known Subinterfaces:

Page<T>, PersistentPropertyPath<P>, PersistentPropertyPaths<T,P>, Slice<T>

All Known Implementing Classes:

DefaultParameters, EntityProjection, EntityProjection.ContainerPropertyProjection, EntityProjection.PropertyProjection, ExpressionDependencies, GeoPage, PageImpl, Parameters, PartTree, PartTree.OrPart, PersistentEntities, PropertyPath, QSort, RepositoryComposition.RepositoryFragments, Revisions, RevisionSort, SliceImpl, Sort, Sort.TypedSort

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 Streamable<T>
extends Iterable<T>, Supplier<Stream<T>>
```
Simple interface to ease streamability of Iterables.

Since:

2.0

Author:

Oliver Gierke, Christoph Strobl

Method Summary

All Methods Static Methods Instance Methods Default Methods
Modifier and Type	Method and Description
`default Streamable<T>`	`and(Iterable<? extends T> iterable)` Creates a new `Streamable` from the current one and the given `Iterable` concatenated.
`default Streamable<T>`	`and(Streamable<? extends T> streamable)` Convenience method to allow adding a `Streamable` directly as otherwise the invocation is ambiguous between `and(Iterable)` and `and(Supplier)`.
`default Streamable<T>`	`and(Supplier<? extends Stream<? extends T>> stream)` Creates a new `Streamable` from the current one and the given `Stream` concatenated.
`default Streamable<T>`	`and(T... others)` Creates a new `Streamable` from the current one and the given values concatenated.
`static <T> Streamable<T>`	`empty()` Returns an empty `Streamable`.
`default Streamable<T>`	`filter(Predicate<? super T> predicate)` Returns a new `Streamable` that will apply the given filter `Predicate` to the current one.
`default <R> Streamable<R>`	`flatMap(Function<? super T,? extends Stream<? extends R>> mapper)` Returns a new `Streamable` that will apply the given `Function` to the current one.
`default Stream<T>`	`get()`
`default boolean`	`isEmpty()` Returns whether the current `Streamable` is empty.
`default <R> Streamable<R>`	`map(Function<? super T,? extends R> mapper)` Returns a new `Streamable` that will apply the given `Function` to the current one.
`static <T> Streamable<T>`	`of(Iterable<T> iterable)` Returns a `Streamable` for the given `Iterable`.
`static <T> Streamable<T>`	`of(Supplier<? extends Stream<T>> supplier)`
`static <T> Streamable<T>`	`of(T... t)` Returns a `Streamable` with the given elements.
`default Stream<T>`	`stream()` Creates a non-parallel `Stream` of the underlying `Iterable`.
`default List<T>`	`toList()` Creates a new, unmodifiable `List`.
`default Set<T>`	`toSet()` Creates a new, unmodifiable `Set`.
`static <S> Collector<S,?,Streamable<S>>`	`toStreamable()` A collector to easily produce a `Streamable` from a `Stream` using `Collectors.toList()` as intermediate collector.
`static <S,T extends Iterable<S>> Collector<S,?,Streamable<S>>`	`toStreamable(Collector<S,?,T> intermediate)` A collector to easily produce a `Streamable` from a `Stream` and the given intermediate collector.

Methods inherited from interface java.lang.Iterable
forEach, iterator, spliterator

- Method Detail
  - empty
```
static <T> Streamable<T> empty()
```
    Returns an empty Streamable.
    
    Returns:
    
    will never be null.
  - of
```
@SafeVarargs
static <T> Streamable<T> of(T... t)
```
    Returns a Streamable with the given elements.
    
    Parameters:
    
    t - the elements to return.
    
    Returns:
  - of
```
static <T> Streamable<T> of(Iterable<T> iterable)
```
    Returns a Streamable for the given Iterable.
    
    Parameters:
    
    iterable - must not be null.
    
    Returns:
  - of
```
static <T> Streamable<T> of(Supplier<? extends Stream<T>> supplier)
```
  - stream
```
default Stream<T> stream()
```
    Creates a non-parallel Stream of the underlying Iterable.
    
    Returns:
    
    will never be null.
  - map
```
default <R> Streamable<R> map(Function<? super T,? extends R> mapper)
```
    Returns a new Streamable that will apply the given Function to the current one.
    
    Parameters:
    
    mapper - must not be null.
    
    Returns:
    
    See Also:
    
    Stream.map(Function)
  - flatMap
```
default <R> Streamable<R> flatMap(Function<? super T,? extends Stream<? extends R>> mapper)
```
    Returns a new Streamable that will apply the given Function to the current one.
    
    Parameters:
    
    mapper - must not be null.
    
    Returns:
    
    See Also:
    
    Stream.flatMap(Function)
  - filter
```
default Streamable<T> filter(Predicate<? super T> predicate)
```
    Returns a new Streamable that will apply the given filter Predicate to the current one.
    
    Parameters:
    
    predicate - must not be null.
    
    Returns:
    
    See Also:
    
    Stream.filter(Predicate)
  - isEmpty
```
default boolean isEmpty()
```
    Returns whether the current Streamable is empty.
    
    Returns:
  - and
```
default Streamable<T> and(Supplier<? extends Stream<? extends T>> stream)
```
    Creates a new Streamable from the current one and the given Stream concatenated.
    
    Parameters:
    
    stream - must not be null.
    
    Returns:
    
    Since:
    
    2.1
  - and
```
default Streamable<T> and(T... others)
```
    Creates a new Streamable from the current one and the given values concatenated.
    
    Parameters:
    
    others - must not be null.
    
    Returns:
    
    will never be null.
    
    Since:
    
    2.2
  - and
```
default Streamable<T> and(Iterable<? extends T> iterable)
```
    Creates a new Streamable from the current one and the given Iterable concatenated.
    
    Parameters:
    
    iterable - must not be null.
    
    Returns:
    
    will never be null.
    
    Since:
    
    2.2
  - and
```
default Streamable<T> and(Streamable<? extends T> streamable)
```
    Convenience method to allow adding a Streamable directly as otherwise the invocation is ambiguous between and(Iterable) and and(Supplier).
    
    Parameters:
    
    streamable - must not be null.
    
    Returns:
    
    will never be null.
    
    Since:
    
    2.2
  - toList
```
default List<T> toList()
```
    Creates a new, unmodifiable List.
    
    Returns:
    
    will never be null.
    
    Since:
    
    2.2
  - toSet
```
default Set<T> toSet()
```
    Creates a new, unmodifiable Set.
    
    Returns:
    
    will never be null.
    
    Since:
    
    2.2
  - get
```
default Stream<T> get()
```
    Specified by:
    
    get in interface Supplier<Stream<T>>
  - toStreamable
```
static <S> Collector<S,?,Streamable<S>> toStreamable()
```
    A collector to easily produce a Streamable from a Stream using Collectors.toList() as intermediate collector.
    
    Returns:
    
    Since:
    
    2.2
    
    See Also:
    
    toStreamable(Collector)
  - toStreamable
```
static <S,T extends Iterable<S>> Collector<S,?,Streamable<S>> toStreamable(Collector<S,?,T> intermediate)
```
    A collector to easily produce a Streamable from a Stream and the given intermediate collector.
    
    Returns:
    
    Since:
    
    2.2

Interface Streamable<T>

Method Summary

Methods inherited from interface java.lang.Iterable

Method Detail

empty

of

of

of

stream

map

flatMap

filter

isEmpty

and

and

and

and

toList

toSet

get

toStreamable

toStreamable