Package io.datarouter.scanner

Interface Scanner<T>

All Superinterfaces:

AutoCloseable, Closeable

All Known Implementing Classes:

AdvanceUntilScanner, AdvanceWhileScanner, ArrayScanner, BaseLinkedScanner, BaseScanner, BatchingScanner, CollatingScanner, ComparableScanner, ConcatenatingScanner, DeduplicatingScanner, DistinctScanner, EachScanner, EmptyScanner, FilteringScanner, IteratorScanner, LimitingScanner, MappingScanner, NaturalSortingScanner, ObjectScanner, PagingScanner, ParallelMappingScanner, PrefetchingScanner, RetainingScanner, SamplingScanner, SortingScanner, SteppingScanner, StreamScanner

public interface Scanner<T>
extends Closeable

Method Summary

Modifier and Type	Method	Description
boolean	advance()
default Scanner<T>	advanceUntil(Predicate<? super T> predicate)	Stop the scanner when the predicate matches, excluding the item that caused it to stop.
default Scanner<T>	advanceWhile(Predicate<? super T> predicate)	Stop the scanner when the predicated fails to match, excluding the item that caused it to stop.
default boolean	allMatch(Predicate<? super T> predicate)
default boolean	anyMatch(Predicate<? super T> predicate)
default Scanner<List<T>>	batch(int batchSize)
default void	close()
default <R> Scanner<R>	collate(Function<? super T,Scanner<R>> mapper)
default <R> Scanner<R>	collate(Function<? super T,Scanner<R>> mapper, Comparator<? super R> comparator)
default <C extends Collection<T>> C	collect(Supplier<C> collectionSupplier)
default <R, A> R	collect(Collector<? super T,A,R> collector)
static <T> Scanner<T>	concat(Scanner<T>... scanners)
default <R> Scanner<R>	concat(Function<? super T,Scanner<R>> mapper)
default long	count()
T	current()
default Scanner<T>	deduplicate()	Removes consecutive duplicates.
default Scanner<T>	deduplicateBy(Function<T,?> mapper)
default Scanner<T>	distinct()
default Scanner<T>	distinctBy(Function<T,?> mapper)
default Scanner<T>	each(Consumer<? super T> consumer)
static <T> Scanner<T>	empty()
default Scanner<T>	exclude(Predicate<? super T> predicate)
default Optional<T>	findAny()
default Optional<T>	findFirst()
default Optional<T>	findLast()
default Scanner<T>	flush(Consumer<List<T>> consumer)
default void	forEach(Consumer<? super T> action)
default boolean	hasAny()
default Scanner<T>	include(Predicate<? super T> predicate)
default boolean	isEmpty()
default Iterable<T>	iterable()
default Iterator<T>	iterator()
default Scanner<T>	limit(long limit)
default <R> Scanner<R>	link(Function<Scanner<T>,BaseLinkedScanner<T,R>> scannerBuilder)
default List<T>	list()
default <R> R	listTo(Function<List<T>,R> mapper)
default <R> Scanner<R>	map(Function<? super T,? extends R> mapper)
default Optional<T>	max(Comparator<? super T> comparator)
default Optional<T>	min(Comparator<? super T> comparator)
default boolean	noneMatch(Predicate<? super T> predicate)
static <T> Scanner<T>	of(Iterable<T> iterable)
static <T> Scanner<T>	of(Iterator<T> iterator)
static <T> Scanner<T>	of(Stream<T> stream)
static <T> Scanner<T>	of(T object)
static <T> Scanner<T>	of(T... array)
default ParallelScanner<T>	parallel(ParallelScannerContext context)
default Scanner<T>	prefetch(ExecutorService exec, int batchSize)
default Optional<T>	reduce(BinaryOperator<T> reducer)
default Scanner<RetainingGroup<T>>	retain(int retaining)
default Scanner<T>	sample(long sampleSize, boolean includeLast)
default Scanner<T>	skip(long numToSkip)
default Scanner<T>	sorted()
default Scanner<T>	sorted(Comparator<? super T> comparator)
default Stream<T>	stream()
default DoubleStream	streamDoubles(ToDoubleFunction<? super T> mapper)
default IntStream	streamInts(ToIntFunction<? super T> mapper)
default LongStream	streamLongs(ToLongFunction<? super T> mapper)
default List<T>	take(int numToTake)
default Object[]	toArray()

Method Details

advance

boolean advance()

current

T current()

close

default void close()

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Closeable

allMatch

default boolean allMatch(Predicate<? super T> predicate)

anyMatch

default boolean anyMatch(Predicate<? super T> predicate)

collect

default <C extends Collection<T>> C collect(Supplier<C> collectionSupplier)

collect

default <R, A> R collect(Collector<? super T,A,R> collector)

count

default long count()

findAny

default Optional<T> findAny()

findFirst

default Optional<T> findFirst()

findLast

default Optional<T> findLast()

flush

default Scanner<T> flush(Consumer<List<T>> consumer)

forEach

default void forEach(Consumer<? super T> action)

hasAny

default boolean hasAny()

isEmpty

default boolean isEmpty()

list

default List<T> list()

listTo

default <R> R listTo(Function<List<T>,R> mapper)

max

default Optional<T> max(Comparator<? super T> comparator)

min

default Optional<T> min(Comparator<? super T> comparator)

noneMatch

default boolean noneMatch(Predicate<? super T> predicate)

reduce

default Optional<T> reduce(BinaryOperator<T> reducer)

toArray

default Object[] toArray()

advanceUntil

default Scanner<T> advanceUntil(Predicate<? super T> predicate)

Stop the scanner when the predicate matches, excluding the item that caused it to stop.

advanceWhile

default Scanner<T> advanceWhile(Predicate<? super T> predicate)

Stop the scanner when the predicated fails to match, excluding the item that caused it to stop.

batch

default Scanner<List<T>> batch(int batchSize)

deduplicate

default Scanner<T> deduplicate()

Removes consecutive duplicates. Lighter weight than distinct() because all elements need not be collected into memory.

deduplicateBy

default Scanner<T> deduplicateBy(Function<T,?> mapper)

distinct

default Scanner<T> distinct()

distinctBy

default Scanner<T> distinctBy(Function<T,?> mapper)

each

default Scanner<T> each(Consumer<? super T> consumer)

exclude

default Scanner<T> exclude(Predicate<? super T> predicate)

include

default Scanner<T> include(Predicate<? super T> predicate)

limit

default Scanner<T> limit(long limit)

link

default <R> Scanner<R> link(Function<Scanner<T>,BaseLinkedScanner<T,R>> scannerBuilder)

map

default <R> Scanner<R> map(Function<? super T,? extends R> mapper)

retain

default Scanner<RetainingGroup<T>> retain(int retaining)

prefetch

default Scanner<T> prefetch(ExecutorService exec, int batchSize)

sample

default Scanner<T> sample(long sampleSize, boolean includeLast)

skip

default Scanner<T> skip(long numToSkip)

sorted

default Scanner<T> sorted()

sorted

default Scanner<T> sorted(Comparator<? super T> comparator)

take

default List<T> take(int numToTake)

collate

default <R> Scanner<R> collate(Function<? super T,Scanner<R>> mapper)

collate

default <R> Scanner<R> collate(Function<? super T,Scanner<R>> mapper, Comparator<? super R> comparator)

concat

default <R> Scanner<R> concat(Function<? super T,Scanner<R>> mapper)

concat

@SafeVarargs static <T> Scanner<T> concat(Scanner<T>... scanners)

parallel

default ParallelScanner<T> parallel(ParallelScannerContext context)

iterator

default Iterator<T> iterator()

iterable

default Iterable<T> iterable()

stream

default Stream<T> stream()

streamInts

default IntStream streamInts(ToIntFunction<? super T> mapper)

streamLongs

default LongStream streamLongs(ToLongFunction<? super T> mapper)

streamDoubles

default DoubleStream streamDoubles(ToDoubleFunction<? super T> mapper)

empty

static <T> Scanner<T> empty()

of

static <T> Scanner<T> of(T object)

of

@SafeVarargs static <T> Scanner<T> of(T... array)

of

static <T> Scanner<T> of(Iterator<T> iterator)

of

static <T> Scanner<T> of(Iterable<T> iterable)

of

static <T> Scanner<T> of(Stream<T> stream)