org.rapidoid.fluent

Interface Flow<T>

All Superinterfaces:

AutoCloseable, BaseStream<T,Stream<T>>, Stream<T>

All Known Implementing Classes:

FlowImpl

public interface Flow<T>
extends Stream<T>

A Flow is a Stream decorator with extra operations for convenience.

Since:

5.0.0

Nested Class Summary

Nested classes/interfaces inherited from interface java.util.stream.Stream

Stream.Builder<T>

Method Summary

Modifier and Type	Method and Description
static FlowImpl<Character>	chars(char startInclusive, char endInclusive)
static FlowImpl<Long>	count(long startInclusive, long endInclusive)
Optional<T>	findLast() Returns an Optional describing the last element of this stream, or an empty Optional if the stream is empty.
<K,V> Map<K,List<T>>	groupBy(Function<T,K> transformation) Equivalent to collect(Collectors.groupingBy(transformation)).
static <T> FlowImpl<T>	of(Iterable<T> values)
static <T> FlowImpl<T>	of(Stream<T> values)
static <T> FlowImpl<T>	of(T... values)
static FlowImpl<Long>	range(long startInclusive, long endExclusive)
Flow<T>	reverse() Reverses the order of the elements in the flow.
Stream<T>	stream() Returns the wrapped stream.
List<T>	toList() Equivalent to collect(Collectors.toList()).
<K,V> Map<K,V>	toMap(Function<T,K> keyTransformation, Function<T,V> valueTransformation) Equivalent to collect(Collectors.toMap(keyTransformation, valueTransformation)).
Set<T>	toSet() Equivalent to collect(Collectors.toSet()).
<R> Flow<T>	withNonNull(Function<? super T,R> transformation) Equivalent to stream.filter(x -> transformation.apply(x) != null)).
<R> Flow<T>	withNull(Function<? super T,R> transformation) Equivalent to filter(x -> transformation.apply(x) == null).

Methods inherited from interface java.util.stream.Stream

allMatch, anyMatch, builder, collect, collect, concat, count, distinct, empty, filter, findAny, findFirst, flatMap, flatMapToDouble, flatMapToInt, flatMapToLong, forEach, forEachOrdered, generate, iterate, limit, map, mapToDouble, mapToInt, mapToLong, max, min, noneMatch, peek, reduce, reduce, reduce, skip, sorted, sorted, toArray, toArray

Methods inherited from interface java.util.stream.BaseStream

close, isParallel, iterator, onClose, parallel, sequential, spliterator, unordered

Method Detail

of

@SafeVarargs
static <T> FlowImpl<T> of(T... values)

Specified by:

of in interface Stream<T>

of

static <T> FlowImpl<T> of(Iterable<T> values)

Specified by:

of in interface Stream<T>

of

static <T> FlowImpl<T> of(Stream<T> values)

Specified by:

of in interface Stream<T>

range

static FlowImpl<Long> range(long startInclusive,
                            long endExclusive)

count

static FlowImpl<Long> count(long startInclusive,
                            long endInclusive)

chars

static FlowImpl<Character> chars(char startInclusive,
                                 char endInclusive)

stream

Stream<T> stream()

Returns the wrapped stream.

toList

List<T> toList()

Equivalent to collect(Collectors.toList()).

toSet

Set<T> toSet()

Equivalent to collect(Collectors.toSet()).

toMap

<K,V> Map<K,V> toMap(Function<T,K> keyTransformation,
                     Function<T,V> valueTransformation)

Equivalent to collect(Collectors.toMap(keyTransformation, valueTransformation)).

withNonNull

<R> Flow<T> withNonNull(Function<? super T,R> transformation)

Equivalent to stream.filter(x -> transformation.apply(x) != null)).

withNull

<R> Flow<T> withNull(Function<? super T,R> transformation)

Equivalent to filter(x -> transformation.apply(x) == null).

groupBy

<K,V> Map<K,List<T>> groupBy(Function<T,K> transformation)

Equivalent to collect(Collectors.groupingBy(transformation)).

reverse

Flow<T> reverse()

Reverses the order of the elements in the flow.

findLast

Optional<T> findLast()

Returns an Optional describing the last element of this stream, or an empty Optional if the stream is empty. If the stream has no encounter order, then any element may be returned.