org.neo4j.collection.primitive

Class PrimitiveLongCollections

java.lang.Object

org.neo4j.collection.primitive.PrimitiveLongCollections

public class PrimitiveLongCollections
extends Object

Basic and common primitive int collection utils and manipulations.

See Also:

PrimitiveIntCollections, Primitive

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	PrimitiveLongCollections.PrimitiveLongBaseIterator Base iterator for simpler implementations of PrimitiveLongIterators.
static class	PrimitiveLongCollections.PrimitiveLongConcatingIterator
static class	PrimitiveLongCollections.PrimitiveLongFilteringIterator
static class	PrimitiveLongCollections.PrimitiveLongInterleavingIterator
static class	PrimitiveLongCollections.PrimitiveLongRangeIterator

Field Summary

Fields

Modifier and Type	Field and Description
static long[]	EMPTY_LONG_ARRAY

Constructor Summary

Constructors

Constructor and Description
PrimitiveLongCollections()

Method Summary

Modifier and Type	Method and Description
static <C extends Collection<Long>> C	addToCollection(PrimitiveLongIterator iterator, C collection) Adds all the items in iterator to collection.
static PrimitiveLongIterator	append(PrimitiveLongIterator iterator, long item)
static long[]	asArray(Iterator<Long> iterator)
static long[]	asArray(PrimitiveLongIterator iterator)
static List<Long>	asList(PrimitiveLongIterator iterator) Pulls all items from the iterator and puts them into a List, boxing each long.
static PrimitiveLongSet	asSet(PrimitiveLongIterator iterator)
static PrimitiveLongSet	asSetAllowDuplicates(PrimitiveLongIterator iterator)
static PrimitiveLongIterator	concat(Iterable<PrimitiveLongIterator> primitiveLongIterators)
static PrimitiveLongIterator	concat(Iterator<PrimitiveLongIterator> iterators)
static PrimitiveLongIterator	constant(long value)
static int	count(PrimitiveLongIterator iterator)
static long[]	deduplicate(long[] values) Deduplicates values in the sorted values array.
static PrimitiveLongIterator	deduplicate(PrimitiveLongIterator source)
static PrimitiveLongIterator	emptyIterator()
static <T> PrimitiveLongObjectMap<T>	emptyObjectMap()
static PrimitiveLongSet	emptySet()
static boolean	equals(PrimitiveLongIterator first, PrimitiveLongIterator other) Validates whether two Iterators are equal or not, i.e.
static PrimitiveLongIterator	filter(PrimitiveLongIterator source, LongPredicate filter)
static long	first(PrimitiveLongIterator iterator)
static long	first(PrimitiveLongIterator iterator, long defaultItem)
static int	indexOf(PrimitiveLongIterator iterator, long item) Returns the index of the given item in the iterator(zero-based).
static long	itemAt(PrimitiveLongIterator iterator, int index)
static long	itemAt(PrimitiveLongIterator iterator, int index, long defaultItem)
static PrimitiveLongIterator	iterator(long... items)
static long	last(PrimitiveLongIterator iterator)
static long	last(PrimitiveLongIterator iterator, long defaultItem)
static PrimitiveLongIterator	limit(PrimitiveLongIterator source, int maxItems)
static <T> Iterator<T>	map(LongFunction<T> mapFunction, PrimitiveLongIterator source)
static PrimitiveLongIterator	not(PrimitiveLongIterator source, long disallowedValue)
static PrimitiveLongIterator	prepend(long item, PrimitiveLongIterator iterator)
static PrimitiveLongIterator	range(long end)
static PrimitiveLongIterator	range(long start, long end)
static PrimitiveLongIterator	range(long start, long end, long stride)
static PrimitiveLongResourceIterator	resourceIterator(PrimitiveLongIterator iterator, org.neo4j.graphdb.Resource resource) Wraps a PrimitiveLongIterator in a PrimitiveLongResourceIterator which closes the provided resource in Resource.close().
static PrimitiveLongIterator	reversed(long... items)
static PrimitiveLongIterator	reversed(PrimitiveLongIterator source)
static PrimitiveLongSet	setOf(long... values)
static long	single(PrimitiveLongIterator iterator)
static long	single(PrimitiveLongIterator iterator, long defaultItem)
static PrimitiveLongIterator	singleton(long item)
static PrimitiveLongIterator	skip(PrimitiveLongIterator source, int skipTheFirstNItems)
static Iterator<Long>	toIterator(PrimitiveLongIterator primIterator)
static PrimitiveLongIterator	toPrimitiveIterator(Iterator<Long> iterator)
static Set<Long>	toSet(PrimitiveLongIterator iterator) Pulls all items from the iterator and puts them into a Set, boxing each long.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

EMPTY_LONG_ARRAY

public static final long[] EMPTY_LONG_ARRAY

Constructor Detail

PrimitiveLongCollections

public PrimitiveLongCollections()

Method Detail

iterator

public static PrimitiveLongIterator iterator(long... items)

reversed

public static PrimitiveLongIterator reversed(long... items)

reversed

public static PrimitiveLongIterator reversed(PrimitiveLongIterator source)

concat

public static PrimitiveLongIterator concat(Iterable<PrimitiveLongIterator> primitiveLongIterators)

concat

public static PrimitiveLongIterator concat(Iterator<PrimitiveLongIterator> iterators)

prepend

public static PrimitiveLongIterator prepend(long item,
                                            PrimitiveLongIterator iterator)

append

public static PrimitiveLongIterator append(PrimitiveLongIterator iterator,
                                           long item)

filter

public static PrimitiveLongIterator filter(PrimitiveLongIterator source,
                                           LongPredicate filter)

deduplicate

public static PrimitiveLongIterator deduplicate(PrimitiveLongIterator source)

not

public static PrimitiveLongIterator not(PrimitiveLongIterator source,
                                        long disallowedValue)

skip

public static PrimitiveLongIterator skip(PrimitiveLongIterator source,
                                         int skipTheFirstNItems)

limit

public static PrimitiveLongIterator limit(PrimitiveLongIterator source,
                                          int maxItems)

range

public static PrimitiveLongIterator range(long end)

range

public static PrimitiveLongIterator range(long start,
                                          long end)

range

public static PrimitiveLongIterator range(long start,
                                          long end,
                                          long stride)

singleton

public static PrimitiveLongIterator singleton(long item)

first

public static long first(PrimitiveLongIterator iterator)

first

public static long first(PrimitiveLongIterator iterator,
                         long defaultItem)

last

public static long last(PrimitiveLongIterator iterator)

last

public static long last(PrimitiveLongIterator iterator,
                        long defaultItem)

single

public static long single(PrimitiveLongIterator iterator)

single

public static long single(PrimitiveLongIterator iterator,
                          long defaultItem)

itemAt

public static long itemAt(PrimitiveLongIterator iterator,
                          int index)

itemAt

public static long itemAt(PrimitiveLongIterator iterator,
                          int index,
                          long defaultItem)

indexOf

public static int indexOf(PrimitiveLongIterator iterator,
                          long item)

Returns the index of the given item in the iterator(zero-based). If no items in iterator equals item -1 is returned.

Parameters:

item - the item to look for.

iterator - of items.

Returns:

index of found item or -1 if not found.

equals

public static boolean equals(PrimitiveLongIterator first,
                             PrimitiveLongIterator other)

Validates whether two Iterators are equal or not, i.e. if they have contain same number of items and each orderly item equals one another.

Parameters:

first - the Iterator containing the first items.

other - the Iterator containing the other items.

Returns:

whether the two iterators are equal or not.

asSet

public static PrimitiveLongSet asSet(PrimitiveLongIterator iterator)

asSetAllowDuplicates

public static PrimitiveLongSet asSetAllowDuplicates(PrimitiveLongIterator iterator)

count

public static int count(PrimitiveLongIterator iterator)

asArray

public static long[] asArray(PrimitiveLongIterator iterator)

asArray

public static long[] asArray(Iterator<Long> iterator)

emptyIterator

public static PrimitiveLongIterator emptyIterator()

toPrimitiveIterator

public static PrimitiveLongIterator toPrimitiveIterator(Iterator<Long> iterator)

emptySet

public static PrimitiveLongSet emptySet()

setOf

public static PrimitiveLongSet setOf(long... values)

map

public static <T> Iterator<T> map(LongFunction<T> mapFunction,
                                  PrimitiveLongIterator source)

constant

public static PrimitiveLongIterator constant(long value)

emptyObjectMap

public static <T> PrimitiveLongObjectMap<T> emptyObjectMap()

addToCollection

public static <C extends Collection<Long>> C addToCollection(PrimitiveLongIterator iterator,
                                                             C collection)

Adds all the items in iterator to collection.

Type Parameters:

C - the type of Collection to add to items to.

Parameters:

iterator - the Iterator to grab the items from.

collection - the Collection to add the items to.

Returns:

the collection which was passed in, now filled with the items from iterator.

asList

public static List<Long> asList(PrimitiveLongIterator iterator)

Pulls all items from the iterator and puts them into a List, boxing each long.

Parameters:

iterator - PrimitiveLongIterator to pull values from.

Returns:

a List containing all items.

toIterator

public static Iterator<Long> toIterator(PrimitiveLongIterator primIterator)

resourceIterator

public static PrimitiveLongResourceIterator resourceIterator(PrimitiveLongIterator iterator,
                                                             org.neo4j.graphdb.Resource resource)

Wraps a PrimitiveLongIterator in a PrimitiveLongResourceIterator which closes the provided resource in Resource.close().

Parameters:

iterator - PrimitiveLongIterator to convert

resource - Resource to close in Resource.close()

Returns:

Wrapped PrimitiveLongIterator.

toSet

public static Set<Long> toSet(PrimitiveLongIterator iterator)

Pulls all items from the iterator and puts them into a Set, boxing each long. Any duplicate value will throw IllegalStateException.

Parameters:

iterator - PrimitiveLongIterator to pull values from.

Returns:

a Set containing all items.

Throws:

IllegalStateException - for the first encountered duplicate.

deduplicate

public static long[] deduplicate(long[] values)

Deduplicates values in the sorted values array.

Parameters:

values - sorted array of long values.

Returns:

the provided array if no duplicates were found, otherwise a new shorter array w/o duplicates.