Package org.neo4j.graphalgo.core.utils.collection.primitive

Class PrimitiveLongCollections

java.lang.Object

org.neo4j.graphalgo.core.utils.collection.primitive.PrimitiveLongCollections

public class PrimitiveLongCollections
extends java.lang.Object

Basic and common primitive int collection utils and manipulations.

See Also:

PrimitiveIntCollections

Nested Class Summary

Nested Classes

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

Field Summary

Fields

Modifier and Type	Field	Description
static long[]	EMPTY_LONG_ARRAY

Method Summary

Modifier and Type	Method	Description
static long[]	asArray(java.util.Iterator<java.lang.Long> iterator)
static long[]	asArray(PrimitiveLongIterator iterator)
static java.util.List<java.lang.Long>	asList(PrimitiveLongIterator iterator)	Pulls all items from the iterator and puts them into a List, boxing each long.
static PrimitiveLongIterator	concat(java.lang.Iterable<PrimitiveLongIterator> primitiveLongIterators)
static PrimitiveLongIterator	concat(PrimitiveLongIterator... primitiveLongIterators)
static int	count(PrimitiveLongIterator iterator)
static long[]	deduplicate(long[] values)	Deduplicates values in the sorted values array.
static PrimitiveLongIterator	emptyIterator()
static PrimitiveLongIterator	filter(PrimitiveLongIterator source, java.util.function.LongPredicate filter)
static PrimitiveLongResourceIterator	filter(PrimitiveLongResourceIterator source, java.util.function.LongPredicate filter)
static int	indexOf(PrimitiveLongIterator iterator, long item)	Returns the index of the given item in the iterator(zero-based).
static PrimitiveLongIterator	iterator(long... items)
static <T> java.util.Iterator<T>	map(java.util.function.LongFunction<T> mapFunction, PrimitiveLongIterator source)
static PrimitiveLongIterator	range(long start, long end)
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 long	single(PrimitiveLongIterator iterator, long defaultItem)
static java.util.Iterator<java.lang.Long>	toIterator(PrimitiveLongIterator primIterator)
static PrimitiveLongIterator	toPrimitiveIterator(java.util.Iterator<java.lang.Long> iterator)
static java.util.Set<java.lang.Long>	toSet(PrimitiveLongIterator iterator)	Pulls all items from the iterator and puts them into a Set, boxing each long.
static java.util.Set<java.lang.Long>	toSet(PrimitiveLongSet set)	Convert primitive set into a plain old java Set, boxing each long.

Methods inherited from class java.lang.Object

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

Field Detail

EMPTY_LONG_ARRAY

public static final long[] EMPTY_LONG_ARRAY

Method Detail

iterator

public static PrimitiveLongIterator iterator(long... items)

concat

public static PrimitiveLongIterator concat(PrimitiveLongIterator... primitiveLongIterators)

concat

public static PrimitiveLongIterator concat(java.lang.Iterable<PrimitiveLongIterator> primitiveLongIterators)

filter

public static PrimitiveLongIterator filter(PrimitiveLongIterator source,
                                           java.util.function.LongPredicate filter)

filter

public static PrimitiveLongResourceIterator filter(PrimitiveLongResourceIterator source,
                                                   java.util.function.LongPredicate filter)

range

public static PrimitiveLongIterator range(long start,
                                          long end)

single

public static long single(PrimitiveLongIterator iterator,
                          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.

count

public static int count(PrimitiveLongIterator iterator)

asArray

public static long[] asArray(PrimitiveLongIterator iterator)

asArray

public static long[] asArray(java.util.Iterator<java.lang.Long> iterator)

emptyIterator

public static PrimitiveLongIterator emptyIterator()

toPrimitiveIterator

public static PrimitiveLongIterator toPrimitiveIterator(java.util.Iterator<java.lang.Long> iterator)

map

public static <T> java.util.Iterator<T> map(java.util.function.LongFunction<T> mapFunction,
                                            PrimitiveLongIterator source)

asList

public static java.util.List<java.lang.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 java.util.Iterator<java.lang.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 java.util.Set<java.lang.Long> toSet(PrimitiveLongSet set)

Convert primitive set into a plain old java Set, boxing each long.

Parameters:

set - PrimitiveLongSet set of primitive values.

Returns:

a Set containing all items.

toSet

public static java.util.Set<java.lang.Long> toSet(PrimitiveLongIterator iterator)

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

Parameters:

iterator - PrimitiveLongIterator to pull values from.

Returns:

a Set containing all items.

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.