public interface RemoteLongStream extends LongStream, BaseRemoteStream<Long,LongStream>
long
primitive specialization of RemoteStream
.
The following example illustrates an aggregate operation using RemoteStream
and RemoteLongStream
, computing the sum of the weights of the red widgets:
long sum = widgets.stream()
.filter(w -> w.getColor() == RED)
.mapToLong(w -> w.getWeight())
.sum();
This interface is an extension of java.util.stream.LongStream
that captures lambdas used as method arguments as serializable lambdas.
RemoteStream
, com.tangosol.util.streamLongStream.Builder
Modifier and Type | Method and Description |
---|---|
boolean |
allMatch(LongPredicate predicate)
Returns whether all elements of this stream match the provided predicate.
|
default boolean |
allMatch(Remote.LongPredicate predicate)
Returns whether all elements of this stream match the provided predicate.
|
boolean |
anyMatch(LongPredicate predicate)
Returns whether any elements of this stream match the provided predicate.
|
default boolean |
anyMatch(Remote.LongPredicate predicate)
Returns whether any elements of this stream match the provided predicate.
|
RemoteDoubleStream |
asDoubleStream()
Returns a
DoubleStream consisting of the elements of this stream, converted to double . |
OptionalDouble |
average()
Returns an
OptionalDouble describing the arithmetic mean of elements of this stream, or an empty optional if this stream is empty. |
RemoteStream<Long> |
boxed()
Returns a
Stream consisting of the elements of this stream, each boxed to a Long . |
default <R> R |
collect(Remote.Supplier<R> supplier, Remote.ObjLongConsumer<R> accumulator, Remote.BiConsumer<R,R> combiner)
Performs a mutable reduction operation on the elements of this stream.
|
<R> R |
collect(Supplier<R> supplier, ObjLongConsumer<R> 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.
|
LongStream |
distinct()
Returns a stream consisting of the distinct elements of this stream.
|
RemoteLongStream |
filter(LongPredicate predicate)
Returns a stream consisting of the elements of this stream that match the given predicate.
|
default RemoteLongStream |
filter(Remote.LongPredicate predicate)
Returns a stream consisting of the elements of this stream that match the given predicate.
|
OptionalLong |
findAny()
Returns an
OptionalLong describing some element of the stream, or an empty OptionalLong if the stream is empty. |
OptionalLong |
findFirst()
Returns an
OptionalLong describing the first element of this stream, or an empty OptionalLong if the stream is empty. |
RemoteLongStream |
flatMap(LongFunction<? extends LongStream> 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 RemoteLongStream |
flatMap(Remote.LongFunction<? extends LongStream> 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.
|
void |
forEach(LongConsumer action)
Performs an action for each element of this stream.
|
void |
forEachOrdered(LongConsumer action)
Performs an action for each element of this stream, guaranteeing that each element is processed in encounter order for streams that have a defined encounter order.
|
PrimitiveIterator.OfLong |
iterator() |
LongStream |
limit(long maxSize)
Returns a stream consisting of the elements of this stream, truncated to be no longer than
maxSize in length. |
RemoteLongStream |
map(LongUnaryOperator mapper)
Returns a stream consisting of the results of applying the given function to the elements of this stream.
|
default RemoteLongStream |
map(Remote.LongUnaryOperator mapper)
Returns a stream consisting of the results of applying the given function to the elements of this stream.
|
RemoteDoubleStream |
mapToDouble(LongToDoubleFunction mapper)
Returns a
DoubleStream consisting of the results of applying the given function to the elements of this stream. |
default RemoteDoubleStream |
mapToDouble(Remote.LongToDoubleFunction mapper)
Returns a
DoubleStream consisting of the results of applying the given function to the elements of this stream. |
RemoteIntStream |
mapToInt(LongToIntFunction mapper)
Returns an
IntStream consisting of the results of applying the given function to the elements of this stream. |
default RemoteIntStream |
mapToInt(Remote.LongToIntFunction mapper)
Returns an
IntStream consisting of the results of applying the given function to the elements of this stream. |
<U> RemoteStream<U> |
mapToObj(LongFunction<? extends U> mapper)
Returns an object-valued
Stream consisting of the results of applying the given function to the elements of this stream. |
default <U> RemoteStream<U> |
mapToObj(Remote.LongFunction<? extends U> mapper)
Returns an object-valued
Stream consisting of the results of applying the given function to the elements of this stream. |
OptionalLong |
max()
Returns an
OptionalLong describing the maximum element of this stream, or an empty optional if this stream is empty. |
OptionalLong |
min()
Returns an
OptionalLong describing the minimum element of this stream, or an empty optional if this stream is empty. |
boolean |
noneMatch(LongPredicate predicate)
Returns whether no elements of this stream match the provided predicate.
|
default boolean |
noneMatch(Remote.LongPredicate predicate)
Returns whether no elements of this stream match the provided predicate.
|
RemoteLongStream |
parallel() |
RemoteLongStream |
peek(LongConsumer 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 RemoteLongStream |
peek(Remote.LongConsumer 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.
|
OptionalLong |
reduce(LongBinaryOperator op)
Performs a reduction on the elements of this stream, using an associative accumulation function, and returns an
OptionalLong describing the reduced value, if any. |
long |
reduce(long identity, LongBinaryOperator op)
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 long |
reduce(long identity, Remote.LongBinaryOperator op)
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 OptionalLong |
reduce(Remote.LongBinaryOperator op)
Performs a reduction on the elements of this stream, using an associative accumulation function, and returns an
OptionalLong describing the reduced value, if any. |
RemoteLongStream |
sequential() |
LongStream |
skip(long n)
Returns a stream consisting of the remaining elements of this stream after discarding the first
n elements of the stream. |
LongStream |
sorted()
Returns a stream consisting of the elements of this stream in sorted order.
|
Spliterator.OfLong |
spliterator() |
long |
sum()
Returns the sum of elements in this stream.
|
LongSummaryStatistics |
summaryStatistics()
Returns a
LongSummaryStatistics describing various summary data about the elements of this stream. |
long[] |
toArray()
Returns an array containing the elements of this stream.
|
builder, concat, empty, generate, iterate, of, of, range, rangeClosed
pipeline
close, isParallel, onClose, unordered
RemoteLongStream filter(LongPredicate predicate)
This is an intermediate operation.
filter
in interface LongStream
predicate
- a non-interfering, stateless predicate to apply to each element to determine if it should be includeddefault RemoteLongStream filter(Remote.LongPredicate predicate)
This is an intermediate operation.
predicate
- a non-interfering, stateless predicate to apply to each element to determine if it should be includedRemoteLongStream map(LongUnaryOperator mapper)
This is an intermediate operation.
map
in interface LongStream
mapper
- a non-interfering, stateless function to apply to each elementdefault RemoteLongStream map(Remote.LongUnaryOperator mapper)
This is an intermediate operation.
mapper
- a non-interfering, stateless function to apply to each element<U> RemoteStream<U> mapToObj(LongFunction<? extends U> mapper)
Stream
consisting of the results of applying the given function to the elements of this stream.
This is an intermediate operation.
mapToObj
in interface LongStream
U
- the element type of the new streammapper
- a non-interfering, stateless function to apply to each elementdefault <U> RemoteStream<U> mapToObj(Remote.LongFunction<? extends U> mapper)
Stream
consisting of the results of applying the given function to the elements of this stream.
This is an intermediate operation.
U
- the element type of the new streammapper
- a non-interfering, stateless function to apply to each elementRemoteIntStream mapToInt(LongToIntFunction mapper)
IntStream
consisting of the results of applying the given function to the elements of this stream.
This is an intermediate operation.
mapToInt
in interface LongStream
mapper
- a non-interfering, stateless function to apply to each elementdefault RemoteIntStream mapToInt(Remote.LongToIntFunction 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 elementRemoteDoubleStream mapToDouble(LongToDoubleFunction 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 LongStream
mapper
- a non-interfering, stateless function to apply to each elementdefault RemoteDoubleStream mapToDouble(Remote.LongToDoubleFunction 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 elementRemoteLongStream flatMap(LongFunction<? extends LongStream> 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.
flatMap
in interface LongStream
mapper
- a non-interfering, stateless function to apply to each element which produces a LongStream
of new valuesRemoteStream.flatMap(Function)
default RemoteLongStream flatMap(Remote.LongFunction<? extends LongStream> 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.
mapper
- a non-interfering, stateless function to apply to each element which produces a LongStream
of new valuesRemoteStream.flatMap(Function)
RemoteLongStream peek(LongConsumer 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.
peek
in interface LongStream
action
- a non-interfering action to perform on the elements as they are consumed from the streamdefault RemoteLongStream peek(Remote.LongConsumer 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 streamLongStream distinct()
This is a stateful intermediate operation.
distinct
in interface LongStream
LongStream sorted()
This is a stateful intermediate operation.
sorted
in interface LongStream
LongStream limit(long maxSize)
maxSize
in length.
This is a short-circuiting stateful intermediate operation.
limit
in interface LongStream
maxSize
- the number of elements the stream should be limited toIllegalArgumentException
- if maxSize
is negativeLongStream 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 LongStream
n
- the number of leading elements to skipIllegalArgumentException
- if n
is negativevoid forEach(LongConsumer action)
This is a terminal operation.
For parallel stream pipelines, this operation does not guarantee to respect the encounter order of the stream, as doing so would sacrifice the benefit of parallelism. For any given element, the action may be performed at whatever time and in whatever thread the library chooses. If the action accesses shared state, it is responsible for providing the required synchronization.
forEach
in interface LongStream
action
- a non-interfering action to perform on the elementsvoid forEachOrdered(LongConsumer action)
This is a terminal operation.
forEachOrdered
in interface LongStream
action
- a non-interfering action to perform on the elementsforEach(LongConsumer)
long[] toArray()
This is a terminal operation.
toArray
in interface LongStream
long reduce(long identity, LongBinaryOperator op)
long result = identity;
for (long element : this stream)
result = accumulator.applyAsLong(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 x
, accumulator.apply(identity, x)
is equal to x
. The accumulator
function must be an associative function.
This is a terminal operation.
default long reduce(long identity, Remote.LongBinaryOperator op)
long result = identity;
for (long element : this stream)
result = accumulator.applyAsLong(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 x
, accumulator.apply(identity, x)
is equal to x
. The accumulator
function must be an associative function.
This is a terminal operation.
OptionalLong reduce(LongBinaryOperator op)
OptionalLong
describing the reduced value, if any. This is equivalent to:
boolean foundAny = false;
long result = null;
for (long element : this stream) {
if (!foundAny) {
foundAny = true;
result = element;
}
else
result = accumulator.applyAsLong(result, element);
}
return foundAny ? OptionalLong.of(result) : OptionalLong.empty();
but is not constrained to execute sequentially.
The accumulator
function must be an associative function.
This is a terminal operation.
reduce
in interface LongStream
op
- an associative, non-interfering, stateless function for combining two valuesreduce(long, LongBinaryOperator)
default OptionalLong reduce(Remote.LongBinaryOperator op)
OptionalLong
describing the reduced value, if any. This is equivalent to:
boolean foundAny = false;
long result = null;
for (long element : this stream) {
if (!foundAny) {
foundAny = true;
result = element;
}
else
result = accumulator.applyAsLong(result, element);
}
return foundAny ? OptionalLong.of(result) : OptionalLong.empty();
but is not constrained to execute sequentially.
The accumulator
function must be an associative function.
This is a terminal operation.
op
- an associative, non-interfering, stateless function for combining two valuesreduce(long, LongBinaryOperator)
<R> R collect(Supplier<R> supplier, ObjLongConsumer<R> 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 (long element : this stream)
accumulator.accept(result, element);
return result;
Like reduce(long, LongBinaryOperator)
, collect
operations can be parallelized without requiring additional synchronization.
This is a terminal operation.
collect
in interface LongStream
R
- type of the resultsupplier
- 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 functionRemoteStream.collect(Supplier, BiConsumer, BiConsumer)
default <R> R collect(Remote.Supplier<R> supplier, Remote.ObjLongConsumer<R> 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 (long element : this stream)
accumulator.accept(result, element);
return result;
Like reduce(long, LongBinaryOperator)
, collect
operations can be parallelized without requiring additional synchronization.
This is a terminal operation.
R
- type of the resultsupplier
- 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 functionRemoteStream.collect(Supplier, BiConsumer, BiConsumer)
long sum()
return reduce(0, Long::sum);
This is a terminal operation.
sum
in interface LongStream
OptionalLong min()
OptionalLong
describing the minimum element of this stream, or an empty optional if this stream is empty. This is a special case of a reduction and is equivalent to:
return reduce(Long::min);
This is a terminal operation.
min
in interface LongStream
OptionalLong
containing the minimum element of this stream, or an empty OptionalLong
if the stream is emptyOptionalLong max()
OptionalLong
describing the maximum element of this stream, or an empty optional if this stream is empty. This is a special case of a reduction and is equivalent to:
return reduce(Long::max);
This is a terminal operation.
max
in interface LongStream
OptionalLong
containing the maximum element of this stream, or an empty OptionalLong
if the stream is emptylong count()
return map(e -> 1L).sum();
This is a terminal operation.
count
in interface LongStream
OptionalDouble average()
OptionalDouble
describing the arithmetic mean of elements of this stream, or an empty optional if this stream is empty. This is a special case of a reduction.
This is a terminal operation.
average
in interface LongStream
OptionalDouble
containing the average element of this stream, or an empty optional if the stream is emptyLongSummaryStatistics summaryStatistics()
LongSummaryStatistics
describing various summary data about the elements of this stream. This is a special case of a reduction.
This is a terminal operation.
summaryStatistics
in interface LongStream
LongSummaryStatistics
describing various summary data about the elements of this streamboolean anyMatch(LongPredicate predicate)
false
is returned and the predicate is not evaluated.
This is a short-circuiting terminal operation.
anyMatch
in interface LongStream
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
default boolean anyMatch(Remote.LongPredicate predicate)
false
is returned and the predicate is not evaluated.
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(LongPredicate predicate)
true
is returned and the predicate is not evaluated.
This is a short-circuiting terminal operation.
allMatch
in interface LongStream
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
default boolean allMatch(Remote.LongPredicate predicate)
true
is returned and the predicate is not evaluated.
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(LongPredicate predicate)
true
is returned and the predicate is not evaluated.
This is a short-circuiting terminal operation.
noneMatch
in interface LongStream
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
default boolean noneMatch(Remote.LongPredicate predicate)
true
is returned and the predicate is not evaluated.
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
OptionalLong findFirst()
OptionalLong
describing the first element of this stream, or an empty OptionalLong
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 LongStream
OptionalLong
describing the first element of this stream, or an empty OptionalLong
if the stream is emptyOptionalLong findAny()
OptionalLong
describing some element of the stream, or an empty OptionalLong
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 LongStream
OptionalLong
describing some element of this stream, or an empty OptionalLong
if the stream is emptyfindFirst()
RemoteDoubleStream asDoubleStream()
DoubleStream
consisting of the elements of this stream, converted to double
.
This is an intermediate operation.
asDoubleStream
in interface LongStream
DoubleStream
consisting of the elements of this stream, converted to double
RemoteStream<Long> boxed()
Stream
consisting of the elements of this stream, each boxed to a Long
.
This is an intermediate operation.
boxed
in interface LongStream
Stream
consistent of the elements of this stream, each boxed to Long
RemoteLongStream sequential()
sequential
in interface BaseStream<Long,LongStream>
sequential
in interface LongStream
RemoteLongStream parallel()
parallel
in interface BaseStream<Long,LongStream>
parallel
in interface LongStream
PrimitiveIterator.OfLong iterator()
iterator
in interface BaseStream<Long,LongStream>
iterator
in interface LongStream
Spliterator.OfLong spliterator()
spliterator
in interface BaseStream<Long,LongStream>
spliterator
in interface LongStream