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

Class PrimitiveIntCollections

java.lang.Object

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

public class PrimitiveIntCollections
extends java.lang.Object

Basic and common primitive int collection utils and manipulations.

See Also:

PrimitiveLongCollections

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	PrimitiveIntCollections.PrimitiveIntBaseIterator	Base iterator for simpler implementations of PrimitiveIntIterators.
static class	PrimitiveIntCollections.PrimitiveIntConcatingIterator
static class	PrimitiveIntCollections.PrimitiveIntFilteringIterator

Method Summary

Modifier and Type	Method	Description
static long[]	asLongArray(PrimitiveIntCollection values)
static PrimitiveIntIterator	concat(java.util.Iterator<PrimitiveIntIterator> iterators)
static void	consume(PrimitiveIntIterator source, java.util.function.IntConsumer consumer)
static boolean	contains(int[] values, int candidate)
static int[]	deduplicate(int[] values)	Deduplicates values in the values array.
static PrimitiveIntIterator	emptyIterator()
static PrimitiveIntIterator	filter(PrimitiveIntIterator source, java.util.function.IntPredicate filter)
static PrimitiveIntIterator	iterator(int... items)
static <T> java.util.Iterator<T>	map(java.util.function.IntFunction<T> mapFunction, PrimitiveIntIterator source)
static <T> java.util.Set<T>	mapToSet(PrimitiveIntIterator iterator, java.util.function.IntFunction<T> map)
static java.util.List<java.lang.Integer>	toList(PrimitiveIntIterator iterator)	Pulls all items from the iterator and puts them into a List, boxing each int.
static PrimitiveIntIterator	toPrimitiveIterator(java.util.Iterator<java.lang.Integer> iterator)
static java.util.Set<java.lang.Integer>	toSet(PrimitiveIntIterator iterator)	Pulls all items from the iterator and puts them into a Set, boxing each int.

Methods inherited from class java.lang.Object

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

Method Detail

iterator

public static PrimitiveIntIterator iterator(int... items)

concat

public static PrimitiveIntIterator concat(java.util.Iterator<PrimitiveIntIterator> iterators)

filter

public static PrimitiveIntIterator filter(PrimitiveIntIterator source,
                                          java.util.function.IntPredicate filter)

asLongArray

public static long[] asLongArray(PrimitiveIntCollection values)

emptyIterator

public static PrimitiveIntIterator emptyIterator()

toPrimitiveIterator

public static PrimitiveIntIterator toPrimitiveIterator(java.util.Iterator<java.lang.Integer> iterator)

map

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

consume

public static void consume(PrimitiveIntIterator source,
                           java.util.function.IntConsumer consumer)

contains

public static boolean contains(int[] values,
                               int candidate)

toList

public static java.util.List<java.lang.Integer> toList(PrimitiveIntIterator iterator)

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

Parameters:

iterator - PrimitiveIntIterator to pull values from.

Returns:

a List containing all items.

toSet

public static java.util.Set<java.lang.Integer> toSet(PrimitiveIntIterator iterator)

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

Parameters:

iterator - PrimitiveIntIterator to pull values from.

Returns:

a Set containing all items.

Throws:

java.lang.IllegalStateException - for the first encountered duplicate.

mapToSet

public static <T> java.util.Set<T> mapToSet(PrimitiveIntIterator iterator,
                                            java.util.function.IntFunction<T> map)

deduplicate

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

Deduplicates values in the values array.

Parameters:

values - sorted array of int values.

Returns:

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