T
- the type of the stream elementspublic interface RemoteStream<T> extends Stream<T>, BaseRemoteStream<T,Stream<T>>
java.util.stream.Stream
that captures lambdas used as method arguments as serializable lambdas.RemoteIntStream
, RemoteLongStream
, RemoteDoubleStream
, com.tangosol.util.streamStream.Builder<T>
Modifier and Type | Method and Description |
---|---|
boolean |
allMatch(Predicate<? super T> predicate)
Returns whether all elements of this stream match the provided predicate.
|
default boolean |
allMatch(Remote.Predicate<? super T> predicate)
Returns whether all elements of this stream match the provided predicate.
|
boolean |
anyMatch(Predicate<? super T> predicate)
Returns whether any elements of this stream match the provided predicate.
|
default boolean |
anyMatch(Remote.Predicate<? super T> predicate)
Returns whether any elements of this stream match the provided predicate.
|
default <R,A> R |
collect(Collector<? super T,A,R> collector)
Performs a mutable reduction operation on the elements of this stream using a
Collector . |
default <R> R |
collect(Remote.Supplier<R> supplier, Remote.BiConsumer<R,? super T> accumulator, Remote.BiConsumer<R,R> combiner)
Performs a mutable reduction operation on the elements of this stream.
|
<R,A> R |
collect(RemoteCollector<? super T,A,R> collector)
Performs a mutable reduction operation on the elements of this stream using a
Collector . |
<R> R |
collect(Supplier<R> supplier, BiConsumer<R,? super T> accumulator, BiConsumer<R,R> combiner)
Performs a mutable reduction operation on the elements of this stream.
|
long |
count()
Returns the count of elements in this stream.
|
Stream<T> |
distinct()
Returns a stream consisting of the distinct elements (according to
Object.equals(Object) ) of this stream. |
RemoteStream<T> |
filter(Predicate<? super T> predicate)
Returns a stream consisting of the elements of this stream that match the given predicate.
|
default RemoteStream<T> |
filter(Remote.Predicate<? super T> predicate)
Returns a stream consisting of the elements of this stream that match the given predicate.
|
Optional<T> |
findAny()
Returns an
Optional describing some element of the stream, or an empty Optional if the stream is empty. |
Optional<T> |
findFirst()
Returns an
Optional describing the first element of this stream, or an empty Optional if the stream is empty. |
<R> RemoteStream<R> |
flatMap(Function<? super T,? extends Stream<? extends R>> mapper)
Returns a stream consisting of the results of replacing each element of this stream with the contents of a mapped stream produced by applying the provided mapping function to each element.
|
default <R> RemoteStream<R> |
flatMap(Remote.Function<? super T,? extends Stream<? extends R>> mapper)
Returns a stream consisting of the results of replacing each element of this stream with the contents of a mapped stream produced by applying the provided mapping function to each element.
|
RemoteDoubleStream |
flatMapToDouble(Function<? super T,? extends DoubleStream> mapper)
Returns an
DoubleStream consisting of the results of replacing each element of this stream with the contents of a mapped stream produced by applying the provided mapping function to each element. |
default RemoteDoubleStream |
flatMapToDouble(Remote.Function<? super T,? extends DoubleStream> mapper)
Returns an
DoubleStream consisting of the results of replacing each element of this stream with the contents of a mapped stream produced by applying the provided mapping function to each element. |
RemoteIntStream |
flatMapToInt(Function<? super T,? extends IntStream> mapper)
Returns an
IntStream consisting of the results of replacing each element of this stream with the contents of a mapped stream produced by applying the provided mapping function to each element. |
default RemoteIntStream |
flatMapToInt(Remote.Function<? super T,? extends IntStream> mapper)
Returns an
IntStream consisting of the results of replacing each element of this stream with the contents of a mapped stream produced by applying the provided mapping function to each element. |
RemoteLongStream |
flatMapToLong(Function<? super T,? extends LongStream> mapper)
Returns an
LongStream consisting of the results of replacing each element of this stream with the contents of a mapped stream produced by applying the provided mapping function to each element. |
default RemoteLongStream |
flatMapToLong(Remote.Function<? super T,? extends LongStream> mapper)
Returns an
LongStream consisting of the results of replacing each element of this stream with the contents of a mapped stream produced by applying the provided mapping function to each element. |
void |
forEach(Consumer<? super T> action)
Performs an action for each element of this stream.
|
void |
forEachOrdered(Consumer<? super T> action)
Performs an action for each element of this stream, in the encounter order of the stream if the stream has a defined encounter order.
|
Stream<T> |
limit(long maxSize)
Returns a stream consisting of the elements of this stream, truncated to be no longer than
maxSize in length. |
<R> RemoteStream<R> |
map(Function<? super T,? extends R> mapper)
Returns a stream consisting of the results of applying the given function to the elements of this stream.
|
default <R> RemoteStream<R> |
map(Remote.Function<? super T,? extends R> mapper)
Returns a stream consisting of the results of applying the given function to the elements of this stream.
|
default <R> RemoteStream<R> |
map(ValueExtractor<? super T,? extends R> mapper)
Returns a stream consisting of the results of applying the given extractor to the elements of this stream.
|
default RemoteDoubleStream |
mapToDouble(Remote.ToDoubleFunction<? super T> mapper)
Returns a
DoubleStream consisting of the results of applying the given function to the elements of this stream. |
RemoteDoubleStream |
mapToDouble(ToDoubleFunction<? super T> mapper)
Returns a
DoubleStream consisting of the results of applying the given function to the elements of this stream. |
default RemoteDoubleStream |
mapToDouble(ValueExtractor<? super T,? extends Number> mapper)
Returns an
DoubleStream consisting of the results of applying the given extractor to the elements of this stream. |
default RemoteIntStream |
mapToInt(Remote.ToIntFunction<? super T> mapper)
Returns an
IntStream consisting of the results of applying the given function to the elements of this stream. |
RemoteIntStream |
mapToInt(ToIntFunction<? super T> mapper)
Returns an
IntStream consisting of the results of applying the given function to the elements of this stream. |
default RemoteIntStream |
mapToInt(ValueExtractor<? super T,? extends Number> mapper)
Returns an
IntStream consisting of the results of applying the given extractor to the elements of this stream. |
default RemoteLongStream |
mapToLong(Remote.ToLongFunction<? super T> mapper)
Returns a
LongStream consisting of the results of applying the given function to the elements of this stream. |
RemoteLongStream |
mapToLong(ToLongFunction<? super T> mapper)
Returns a
LongStream consisting of the results of applying the given function to the elements of this stream. |
default RemoteLongStream |
mapToLong(ValueExtractor<? super T,? extends Number> mapper)
Returns an
LongStream consisting of the results of applying the given extractor to the elements of this stream. |
Optional<T> |
max(Comparator<? super T> comparator)
Returns the maximum element of this stream according to the provided
Comparator . |
default Optional<T> |
max(Remote.Comparator<? super T> comparator)
Returns the maximum element of this stream according to the provided
Comparator . |
default <U> Optional<T> |
max(ValueExtractor<? super U,? extends Comparable> extractor)
Returns the maximum element of this stream according to the attribute extracted by the provided
ValueExtractor . |
Optional<T> |
min(Comparator<? super T> comparator)
Returns the minimum element of this stream according to the provided
Comparator . |
default Optional<T> |
min(Remote.Comparator<? super T> comparator)
Returns the minimum element of this stream according to the provided
Comparator . |
default <U> Optional<T> |
min(ValueExtractor<? super U,? extends Comparable> extractor)
Returns the minimum element of this stream according to the attribute extracted by the provided
ValueExtractor . |
boolean |
noneMatch(Predicate<? super T> predicate)
Returns whether no elements of this stream match the provided predicate.
|
default boolean |
noneMatch(Remote.Predicate<? super T> predicate)
Returns whether no elements of this stream match the provided predicate.
|
RemoteStream<T> |
parallel()
Returns an equivalent stream that is parallel.
|
RemoteStream<T> |
peek(Consumer<? super T> action)
Returns a stream consisting of the elements of this stream, additionally performing the provided action on each element as elements are consumed from the resulting stream.
|
default RemoteStream<T> |
peek(Remote.Consumer<? super T> action)
Returns a stream consisting of the elements of this stream, additionally performing the provided action on each element as elements are consumed from the resulting stream.
|
Optional<T> |
reduce(BinaryOperator<T> accumulator)
Performs a reduction on the elements of this stream, using an associative accumulation function, and returns an
Optional describing the reduced value, if any. |
default Optional<T> |
reduce(Remote.BinaryOperator<T> accumulator)
Performs a reduction on the elements of this stream, using an associative accumulation function, and returns an
Optional describing the reduced value, if any. |
T |
reduce(T identity, BinaryOperator<T> accumulator)
Performs a reduction on the elements of this stream, using the provided identity value and an associative accumulation function, and returns the reduced value.
|
default T |
reduce(T identity, Remote.BinaryOperator<T> accumulator)
Performs a reduction on the elements of this stream, using the provided identity value and an associative accumulation function, and returns the reduced value.
|
<U> U |
reduce(U identity, BiFunction<U,? super T,U> accumulator, BinaryOperator<U> combiner)
Performs a reduction on the elements of this stream, using the provided identity, accumulation and combining functions.
|
default <U> U |
reduce(U identity, Remote.BiFunction<U,? super T,U> accumulator, Remote.BinaryOperator<U> combiner)
Performs a reduction on the elements of this stream, using the provided identity, accumulation and combining functions.
|
RemoteStream<T> |
sequential()
Returns an equivalent stream that is sequential.
|
Stream<T> |
skip(long n)
Returns a stream consisting of the remaining elements of this stream after discarding the first
n elements of the stream. |
RemoteStream<T> |
sorted()
Returns a stream consisting of the elements of this stream, sorted according to natural order.
|
RemoteStream<T> |
sorted(Comparator<? super T> comparator)
Returns a stream consisting of the elements of this stream, sorted according to the provided
Comparator . |
default RemoteStream<T> |
sorted(Remote.Comparator<? super T> comparator)
Returns a stream consisting of the elements of this stream, sorted according to the provided
Comparator . |
default RemoteStream<T> |
sorted(Remote.Comparator<? super T> comparator, boolean fInverse)
Returns a stream consisting of the elements of this stream, sorted according to the provided
Comparator . |
default <U> RemoteStream<T> |
sorted(ValueExtractor<? super U,? extends Comparable> extractor)
Returns a stream consisting of the elements of this stream, sorted according to attribute extracted by the provided
ValueExtractor . |
default <U> RemoteStream<T> |
sorted(ValueExtractor<? super U,? extends Comparable> extractor, boolean fInverse)
Returns a stream consisting of the elements of this stream, sorted according to attribute extracted by the provided
ValueExtractor . |
Object[] |
toArray()
Returns an array containing the elements of this stream.
|
<A> A[] |
toArray(IntFunction<A[]> generator)
Returns an array containing the elements of this stream, using the provided
generator function to allocate the returned array, as well as any additional arrays that might be required for a partitioned execution or for resizing. |
static <T extends Number> |
toDoubleStream(RemoteStream<T> stream)
Convert stream of numbers into
RemoteDoubleStream . |
static <T extends Number> |
toIntStream(RemoteStream<T> stream)
Convert stream of numbers into
RemoteIntStream . |
static <T extends Number> |
toLongStream(RemoteStream<T> stream)
Convert stream of numbers into
RemoteLongStream . |
RemoteStream<T> |
unordered()
Returns an equivalent stream that is unordered.
|
builder, concat, empty, generate, iterate, of, of
pipeline
close, isParallel, iterator, onClose, spliterator
RemoteStream<T> sequential()
This is an intermediate operation.
sequential
in interface BaseStream<T,Stream<T>>
RemoteStream<T> parallel()
This is an intermediate operation.
parallel
in interface BaseStream<T,Stream<T>>
RemoteStream<T> unordered()
This is an intermediate operation.
unordered
in interface BaseStream<T,Stream<T>>
RemoteStream<T> filter(Predicate<? super T> predicate)
This is an intermediate operation.
default RemoteStream<T> filter(Remote.Predicate<? super T> predicate)
This is an intermediate operation.
predicate
- a non-interfering, stateless predicate to apply to each element to determine if it should be included<R> RemoteStream<R> map(Function<? super T,? extends R> mapper)
This is an intermediate operation.
default <R> RemoteStream<R> map(Remote.Function<? super T,? extends R> mapper)
This is an intermediate operation.
mapper
- a non-interfering, stateless function to apply to each elementdefault <R> RemoteStream<R> map(ValueExtractor<? super T,? extends R> mapper)
This is an intermediate operation.
mapper
- a non-interfering, stateless function to apply to each elementRemoteIntStream mapToInt(ToIntFunction<? super T> mapper)
IntStream
consisting of the results of applying the given function to the elements of this stream.
This is an intermediate operation.
default RemoteIntStream mapToInt(Remote.ToIntFunction<? super T> mapper)
IntStream
consisting of the results of applying the given function to the elements of this stream.
This is an intermediate operation.
mapper
- a non-interfering, stateless function to apply to each elementdefault RemoteIntStream mapToInt(ValueExtractor<? super T,? extends Number> mapper)
IntStream
consisting of the results of applying the given extractor to the elements of this stream.
This is an intermediate operation.
mapper
- a non-interfering, stateless function to apply to each elementRemoteLongStream mapToLong(ToLongFunction<? super T> mapper)
LongStream
consisting of the results of applying the given function to the elements of this stream.
This is an intermediate operation.
default RemoteLongStream mapToLong(Remote.ToLongFunction<? super T> mapper)
LongStream
consisting of the results of applying the given function to the elements of this stream.
This is an intermediate operation.
mapper
- a non-interfering, stateless function to apply to each elementdefault RemoteLongStream mapToLong(ValueExtractor<? super T,? extends Number> mapper)
LongStream
consisting of the results of applying the given extractor to the elements of this stream.
This is an intermediate operation.
mapper
- a non-interfering, stateless function to apply to each elementRemoteDoubleStream mapToDouble(ToDoubleFunction<? super T> mapper)
DoubleStream
consisting of the results of applying the given function to the elements of this stream.
This is an intermediate operation.
mapToDouble
in interface Stream<T>
mapper
- a non-interfering, stateless function to apply to each elementdefault RemoteDoubleStream mapToDouble(Remote.ToDoubleFunction<? super T> mapper)
DoubleStream
consisting of the results of applying the given function to the elements of this stream.
This is an intermediate operation.
mapper
- a non-interfering, stateless function to apply to each elementdefault RemoteDoubleStream mapToDouble(ValueExtractor<? super T,? extends Number> mapper)
DoubleStream
consisting of the results of applying the given extractor to the elements of this stream.
This is an intermediate operation.
mapper
- a non-interfering, stateless function to apply to each element<R> RemoteStream<R> flatMap(Function<? super T,? extends Stream<? extends R>> mapper)
closed
after its contents have been placed into this stream. (If a mapped stream is null
an empty stream is used, instead.)
This is an intermediate operation.
default <R> RemoteStream<R> flatMap(Remote.Function<? super T,? extends Stream<? extends R>> mapper)
closed
after its contents have been placed into this stream. (If a mapped stream is null
an empty stream is used, instead.)
This is an intermediate operation.
R
- The element type of the new streammapper
- a non-interfering, stateless function to apply to each element which produces a stream of new valuesRemoteIntStream flatMapToInt(Function<? super T,? extends IntStream> mapper)
IntStream
consisting of the results of replacing each element of this stream with the contents of a mapped stream produced by applying the provided mapping function to each element. Each mapped stream is closed
after its contents have been placed into this stream. (If a mapped stream is null
an empty stream is used, instead.)
This is an intermediate operation.
flatMapToInt
in interface Stream<T>
mapper
- a non-interfering, stateless function to apply to each element which produces a stream of new valuesflatMap(Function)
default RemoteIntStream flatMapToInt(Remote.Function<? super T,? extends IntStream> mapper)
IntStream
consisting of the results of replacing each element of this stream with the contents of a mapped stream produced by applying the provided mapping function to each element. Each mapped stream is closed
after its contents have been placed into this stream. (If a mapped stream is null
an empty stream is used, instead.)
This is an intermediate operation.
mapper
- a non-interfering, stateless function to apply to each element which produces a stream of new valuesflatMap(Function)
RemoteLongStream flatMapToLong(Function<? super T,? extends LongStream> mapper)
LongStream
consisting of the results of replacing each element of this stream with the contents of a mapped stream produced by applying the provided mapping function to each element. Each mapped stream is closed
after its contents have been placed into this stream. (If a mapped stream is null
an empty stream is used, instead.)
This is an intermediate operation.
flatMapToLong
in interface Stream<T>
mapper
- a non-interfering, stateless function to apply to each element which produces a stream of new valuesflatMap(Function)
default RemoteLongStream flatMapToLong(Remote.Function<? super T,? extends LongStream> mapper)
LongStream
consisting of the results of replacing each element of this stream with the contents of a mapped stream produced by applying the provided mapping function to each element. Each mapped stream is closed
after its contents have been placed into this stream. (If a mapped stream is null
an empty stream is used, instead.)
This is an intermediate operation.
mapper
- a non-interfering, stateless function to apply to each element which produces a stream of new valuesflatMap(Function)
RemoteDoubleStream flatMapToDouble(Function<? super T,? extends DoubleStream> mapper)
DoubleStream
consisting of the results of replacing each element of this stream with the contents of a mapped stream produced by applying the provided mapping function to each element. Each mapped stream is closed
after its contents have been placed into this stream. (If a mapped stream is null
an empty stream is used, instead.)
This is an intermediate operation.
flatMapToDouble
in interface Stream<T>
mapper
- a non-interfering, stateless function to apply to each element which produces a stream of new valuesflatMap(Function)
default RemoteDoubleStream flatMapToDouble(Remote.Function<? super T,? extends DoubleStream> mapper)
DoubleStream
consisting of the results of replacing each element of this stream with the contents of a mapped stream produced by applying the provided mapping function to each element. Each mapped stream is closed
after its contents have been placed into this stream. (If a mapped stream is null
an empty stream is used, instead.)
This is an intermediate operation.
mapper
- a non-interfering, stateless function to apply to each element which produces a stream of new valuesflatMap(Function)
RemoteStream<T> peek(Consumer<? super T> action)
This is an intermediate operation.
For parallel stream pipelines, the action may be called at whatever time and in whatever thread the element is made available by the upstream operation. If the action modifies shared state, it is responsible for providing the required synchronization.
default RemoteStream<T> peek(Remote.Consumer<? super T> action)
This is an intermediate operation.
For parallel stream pipelines, the action may be called at whatever time and in whatever thread the element is made available by the upstream operation. If the action modifies shared state, it is responsible for providing the required synchronization.
action
- a non-interfering action to perform on the elements as they are consumed from the streamStream<T> limit(long maxSize)
maxSize
in length.
This is a short-circuiting stateful intermediate operation.
limit
in interface Stream<T>
maxSize
- the number of elements the stream should be limited toIllegalArgumentException
- if maxSize
is negativeStream<T> skip(long n)
n
elements of the stream. If this stream contains fewer than n
elements then an empty stream will be returned.
This is a stateful intermediate operation.
skip
in interface Stream<T>
n
- the number of leading elements to skipIllegalArgumentException
- if n
is negativeStream<T> distinct()
Object.equals(Object)
) of this stream.
For ordered streams, the selection of distinct elements is stable (for duplicated elements, the element appearing first in the encounter order is preserved.) For unordered streams, no stability guarantees are made.
This is a stateful intermediate operation.
RemoteStream<T> sorted()
Comparable
, a java.lang.ClassCastException
may be thrown when the terminal operation is executed.
For ordered streams, the sort is stable. For unordered streams, no stability guarantees are made.
This is a stateful intermediate operation.
RemoteStream<T> sorted(Comparator<? super T> comparator)
Comparator
.
For ordered streams, the sort is stable. For unordered streams, no stability guarantees are made.
This is a stateful intermediate operation.
default RemoteStream<T> sorted(Remote.Comparator<? super T> comparator)
Comparator
.
For ordered streams, the sort is stable. For unordered streams, no stability guarantees are made.
This is a stateful intermediate operation.
comparator
- a non-interfering, stateless Comparator
to be used to compare stream elementsdefault RemoteStream<T> sorted(Remote.Comparator<? super T> comparator, boolean fInverse)
Comparator
.
For ordered streams, the sort is stable. For unordered streams, no stability guarantees are made.
This is a stateful intermediate operation.
comparator
- a non-interfering, stateless Comparator
to be used to compare stream elementsfInverse
- a flag specifying whether to invert the sort orderdefault <U> RemoteStream<T> sorted(ValueExtractor<? super U,? extends Comparable> extractor)
ValueExtractor
.
For ordered streams, the sort is stable. For unordered streams, no stability guarantees are made.
This is a stateful intermediate operation.
extractor
- a non-interfering, stateless ValueExtractor
to be used to extract the attribute that should be used to compare stream elementsdefault <U> RemoteStream<T> sorted(ValueExtractor<? super U,? extends Comparable> extractor, boolean fInverse)
ValueExtractor
.
For ordered streams, the sort is stable. For unordered streams, no stability guarantees are made.
This is a stateful intermediate operation.
extractor
- a non-interfering, stateless ValueExtractor
to be used to extract the attribute that should be used to compare stream elementsfInverse
- a flag specifying whether to invert natural sort ordervoid forEach(Consumer<? super T> action)
This is a terminal operation.
void forEachOrdered(Consumer<? super T> action)
This is a terminal operation.
This operation processes the elements one at a time, in encounter order if one exists. Performing the action for one element happens-before performing the action for subsequent elements, but for any given element, the action may be performed in whatever thread the library chooses.
forEachOrdered
in interface Stream<T>
action
- a non-interfering action to perform on the elementsforEach(Consumer)
Object[] toArray()
This is a terminal operation.
<A> A[] toArray(IntFunction<A[]> generator)
generator
function to allocate the returned array, as well as any additional arrays that might be required for a partitioned execution or for resizing.
This is a terminal operation.
toArray
in interface Stream<T>
generator
- a function which produces a new array of the desired type and the provided lengthArrayStoreException
- if the runtime type of the array returned from the array generator is not a supertype of the runtime type of every element in this streamT reduce(T identity, BinaryOperator<T> accumulator)
T result = identity;
for (T element : this stream)
result = accumulator.apply(result, element)
return result;
but is not constrained to execute sequentially.
The identity
value must be an identity for the accumulator function. This means that for all t
, accumulator.apply(identity, t)
is equal to t
. The accumulator
function must be an associative function.
This is a terminal operation.
default T reduce(T identity, Remote.BinaryOperator<T> accumulator)
T result = identity;
for (T element : this stream)
result = accumulator.apply(result, element)
return result;
but is not constrained to execute sequentially.
The identity
value must be an identity for the accumulator function. This means that for all t
, accumulator.apply(identity, t)
is equal to t
. The accumulator
function must be an associative function.
This is a terminal operation.
identity
- the identity value for the accumulating functionaccumulator
- an associative, non-interfering, stateless function for combining two valuesOptional<T> reduce(BinaryOperator<T> accumulator)
Optional
describing the reduced value, if any. This is equivalent to:
boolean foundAny = false;
T result = null;
for (T element : this stream) {
if (!foundAny) {
foundAny = true;
result = element;
}
else
result = accumulator.apply(result, element);
}
return foundAny ? Optional.of(result) : Optional.empty();
but is not constrained to execute sequentially.
The accumulator
function must be an associative function.
This is a terminal operation.
reduce
in interface Stream<T>
accumulator
- an associative, non-interfering, stateless function for combining two valuesOptional
describing the result of the reductionNullPointerException
- if the result of the reduction is nullreduce(Object, Remote.BinaryOperator)
, min(Comparator)
, max(Comparator)
default Optional<T> reduce(Remote.BinaryOperator<T> accumulator)
Optional
describing the reduced value, if any. This is equivalent to:
boolean foundAny = false;
T result = null;
for (T element : this stream) {
if (!foundAny) {
foundAny = true;
result = element;
}
else
result = accumulator.apply(result, element);
}
return foundAny ? Optional.of(result) : Optional.empty();
but is not constrained to execute sequentially.
The accumulator
function must be an associative function.
This is a terminal operation.
accumulator
- an associative, non-interfering, stateless function for combining two valuesOptional
describing the result of the reductionNullPointerException
- if the result of the reduction is nullreduce(Object, Remote.BinaryOperator)
, min(Comparator)
, max(Comparator)
<U> U reduce(U identity, BiFunction<U,? super T,U> accumulator, BinaryOperator<U> combiner)
U result = identity;
for (T element : this stream)
result = accumulator.apply(result, element)
return result;
but is not constrained to execute sequentially.
The identity
value must be an identity for the combiner function. This means that for all u
, combiner(identity, u)
is equal to u
. Additionally, the combiner
function must be compatible with the accumulator
function; for all u
and t
, the following must hold:
combiner.apply(u, accumulator.apply(identity, t)) ==
accumulator.apply(u, t)
This is a terminal operation.
reduce
in interface Stream<T>
identity
- the identity value for the combiner functionaccumulator
- an associative, non-interfering, stateless function for incorporating an additional element into a resultcombiner
- an associative, non-interfering, stateless function for combining two values, which must be compatible with the accumulator functionreduce(Remote.BinaryOperator)
, reduce(Object, Remote.BinaryOperator)
default <U> U reduce(U identity, Remote.BiFunction<U,? super T,U> accumulator, Remote.BinaryOperator<U> combiner)
U result = identity;
for (T element : this stream)
result = accumulator.apply(result, element)
return result;
but is not constrained to execute sequentially.
The identity
value must be an identity for the combiner function. This means that for all u
, combiner(identity, u)
is equal to u
. Additionally, the combiner
function must be compatible with the accumulator
function; for all u
and t
, the following must hold:
combiner.apply(u, accumulator.apply(identity, t)) ==
accumulator.apply(u, t)
This is a terminal operation.
identity
- the identity value for the combiner functionaccumulator
- an associative, non-interfering, stateless function for incorporating an additional element into a resultcombiner
- an associative, non-interfering, stateless function for combining two values, which must be compatible with the accumulator functionreduce(Remote.BinaryOperator)
, reduce(Object, Remote.BinaryOperator)
<R> R collect(Supplier<R> supplier, BiConsumer<R,? super T> accumulator, BiConsumer<R,R> combiner)
ArrayList
, and elements are incorporated by updating the state of the result rather than by replacing the result. This produces a result equivalent to:
R result = supplier.get();
for (T element : this stream)
accumulator.accept(result, element);
return result;
Like reduce(Object, Remote.BinaryOperator)
, collect
operations can be parallelized without requiring additional synchronization.
This is a terminal operation.
collect
in interface Stream<T>
supplier
- a function that creates a new result container. For a parallel execution, this function may be called multiple times and must return a fresh value each time.accumulator
- an associative, non-interfering, stateless function for incorporating an additional element into a resultcombiner
- an associative, non-interfering, stateless function for combining two values, which must be compatible with the accumulator functiondefault <R> R collect(Remote.Supplier<R> supplier, Remote.BiConsumer<R,? super T> accumulator, Remote.BiConsumer<R,R> combiner)
ArrayList
, and elements are incorporated by updating the state of the result rather than by replacing the result. This produces a result equivalent to:
R result = supplier.get();
for (T element : this stream)
accumulator.accept(result, element);
return result;
Like reduce(Object, Remote.BinaryOperator)
, collect
operations can be parallelized without requiring additional synchronization.
This is a terminal operation.
supplier
- a function that creates a new result container. For a parallel execution, this function may be called multiple times and must return a fresh value each time.accumulator
- an associative, non-interfering, stateless function for incorporating an additional element into a resultcombiner
- an associative, non-interfering, stateless function for combining two values, which must be compatible with the accumulator functiondefault <R,A> R collect(Collector<? super T,A,R> collector)
Collector
. A Collector
encapsulates the functions used as arguments to collect(Remote.Supplier, Remote.BiConsumer, Remote.BiConsumer)
, allowing for reuse of collection strategies and composition of collect operations such as multiple-level grouping or partitioning.
If the stream is parallel, and the Collector
is concurrent
, and either the stream is unordered or the collector is unordered
, then a concurrent reduction will be performed (see RemoteCollector
for details on concurrent reduction.)
This is a terminal operation.
collect
in interface Stream<T>
collector
- the Collector
describing the reductioncollect(Remote.Supplier, Remote.BiConsumer, Remote.BiConsumer)
<R,A> R collect(RemoteCollector<? super T,A,R> collector)
Collector
. A Collector
encapsulates the functions used as arguments to collect(Remote.Supplier, Remote.BiConsumer, Remote.BiConsumer)
, allowing for reuse of collection strategies and composition of collect operations such as multiple-level grouping or partitioning.
If the stream is parallel, and the Collector
is concurrent
, and either the stream is unordered or the collector is unordered
, then a concurrent reduction will be performed (see RemoteCollector
for details on concurrent reduction.)
This is a terminal operation.
collector
- the Collector
describing the reductioncollect(Remote.Supplier, Remote.BiConsumer, Remote.BiConsumer)
Optional<T> min(Comparator<? super T> comparator)
Comparator
. This is a special case of a reduction.
This is a terminal operation.
default Optional<T> min(Remote.Comparator<? super T> comparator)
Comparator
. This is a special case of a reduction.
This is a terminal operation.
comparator
- a non-interfering, stateless Comparator
to compare elements of this streamOptional
describing the minimum element of this stream, or an empty Optional
if the stream is emptydefault <U> Optional<T> min(ValueExtractor<? super U,? extends Comparable> extractor)
ValueExtractor
. This is a special case of a reduction.
This is a terminal operation.
extractor
- a non-interfering, stateless ValueExtractor
to be used to extract the attribute that should be used to compare stream elementsOptional
describing the minimum element of this stream, or an empty Optional
if the stream is emptyOptional<T> max(Comparator<? super T> comparator)
Comparator
. This is a special case of a reduction.
This is a terminal operation.
default Optional<T> max(Remote.Comparator<? super T> comparator)
Comparator
. This is a special case of a reduction.
This is a terminal operation.
comparator
- a non-interfering, stateless Comparator
to compare elements of this streamOptional
describing the maximum element of this stream, or an empty Optional
if the stream is emptydefault <U> Optional<T> max(ValueExtractor<? super U,? extends Comparable> extractor)
ValueExtractor
. This is a special case of a reduction.
This is a terminal operation.
extractor
- a non-interfering, stateless ValueExtractor
to be used to extract the attribute that should be used to compare stream elementsOptional
describing the maximum element of this stream, or an empty Optional
if the stream is emptylong count()
return mapToLong(e -> 1L).sum();
This is a terminal operation.
boolean anyMatch(Predicate<? super T> predicate)
This is a short-circuiting terminal operation.
default boolean anyMatch(Remote.Predicate<? super T> predicate)
This is a short-circuiting terminal operation.
predicate
- a non-interfering, stateless predicate to apply to elements of this streamtrue
if any elements of the stream match the provided predicate, otherwise false
boolean allMatch(Predicate<? super T> predicate)
This is a short-circuiting terminal operation.
default boolean allMatch(Remote.Predicate<? super T> predicate)
This is a short-circuiting terminal operation.
predicate
- a non-interfering, stateless predicate to apply to elements of this streamtrue
if either all elements of the stream match the provided predicate or the stream is empty, otherwise false
boolean noneMatch(Predicate<? super T> predicate)
This is a short-circuiting terminal operation.
default boolean noneMatch(Remote.Predicate<? super T> predicate)
This is a short-circuiting terminal operation.
predicate
- a non-interfering, stateless predicate to apply to elements of this streamtrue
if either no elements of the stream match the provided predicate or the stream is empty, otherwise false
Optional<T> findFirst()
Optional
describing the first 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.
This is a short-circuiting terminal operation.
findFirst
in interface Stream<T>
Optional
describing the first element of this stream, or an empty Optional
if the stream is emptyNullPointerException
- if the element selected is nullOptional<T> findAny()
Optional
describing some element of the stream, or an empty Optional
if the stream is empty.
This is a short-circuiting terminal operation.
The behavior of this operation is explicitly nondeterministic; it is free to select any element in the stream. This is to allow for maximal performance in parallel operations; the cost is that multiple invocations on the same source may not return the same result. (If a stable result is desired, use findFirst()
instead.)
findAny
in interface Stream<T>
Optional
describing some element of this stream, or an empty Optional
if the stream is emptyNullPointerException
- if the element selected is nullfindFirst()
static <T extends Number> RemoteIntStream toIntStream(RemoteStream<T> stream)
RemoteIntStream
.T
- the type of input stream elementsstream
- the stream of numbersRemoteIntStream
instancestatic <T extends Number> RemoteLongStream toLongStream(RemoteStream<T> stream)
RemoteLongStream
.T
- the type of input stream elementsstream
- the stream of numbersRemoteLongStream
instancestatic <T extends Number> RemoteDoubleStream toDoubleStream(RemoteStream<T> stream)
RemoteDoubleStream
.T
- the type of input stream elementsstream
- the stream of numbersRemoteDoubleStream
instance