org.neo4j.collection.primitive

Class PrimitiveIntCollections

java.lang.Object

org.neo4j.collection.primitive.PrimitiveIntCollections

public class PrimitiveIntCollections
extends Object

Basic and common primitive int collection utils and manipulations.

See Also:

PrimitiveLongCollections, Primitive

Nested Class Summary

Nested Classes

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

Constructor Summary

Constructors

Constructor and Description
PrimitiveIntCollections()

Method Summary

Modifier and Type	Method and Description
static PrimitiveIntIterator	append(PrimitiveIntIterator iterator, int item)
static int[]	asArray(Collection<Integer> values)
static int[]	asArray(PrimitiveIntIterator iterator)
static PrimitiveIntSet	asSet(int[] values)
static PrimitiveIntSet	asSet(long[] values, LongToIntFunction converter)
static PrimitiveIntSet	asSet(PrimitiveIntIterator iterator)
static PrimitiveIntSet	asSetAllowDuplicates(PrimitiveIntIterator iterator)
static PrimitiveIntIterator	concat(Iterator<PrimitiveIntIterator> iterators)
static PrimitiveIntIterator	constant(int value)
static void	consume(PrimitiveIntIterator source, IntConsumer consumer)
static boolean	contains(int[] values, int candidate)
static int	count(PrimitiveIntIterator iterator)
static int[]	deduplicate(int[] values) Deduplicates values in the sorted values array.
static PrimitiveIntIterator	deduplicate(PrimitiveIntIterator source)
static PrimitiveIntIterator	emptyIterator()
static PrimitiveIntSet	emptySet()
static boolean	equals(PrimitiveIntIterator first, PrimitiveIntIterator other) Validates whether two Iterators are equal or not, i.e.
static PrimitiveIntIterator	filter(PrimitiveIntIterator source, IntPredicate filter)
static int	first(PrimitiveIntIterator iterator)
static int	first(PrimitiveIntIterator iterator, int defaultItem)
static PrimitiveIntIterator	flatten(Iterator<PrimitiveIntIterator> source)
static int	indexOf(PrimitiveIntIterator iterator, int item) Returns the index of the given item in the iterator(zero-based).
static int	itemAt(PrimitiveIntIterator iterator, int index)
static int	itemAt(PrimitiveIntIterator iterator, int index, int defaultItem)
static PrimitiveIntIterator	iterator(int... items)
static int	last(PrimitiveIntIterator iterator)
static int	last(PrimitiveIntIterator iterator, int defaultItem)
static PrimitiveIntIterator	limit(PrimitiveIntIterator source, int maxItems)
static <T> Iterator<T>	map(IntFunction<T> mapFunction, PrimitiveIntIterator source)
static <T> Set<T>	mapToSet(PrimitiveIntIterator iterator, IntFunction<T> map)
static PrimitiveIntIterator	not(PrimitiveIntIterator source, int disallowedValue)
static PrimitiveIntIterator	prepend(int item, PrimitiveIntIterator iterator)
static PrimitiveIntIterator	range(int end)
static PrimitiveIntIterator	range(int start, int end)
static PrimitiveIntIterator	range(int start, int end, int stride)
static PrimitiveIntIterator	reversed(int... items)
static PrimitiveIntIterator	reversed(PrimitiveIntIterator source)
static int	single(PrimitiveIntIterator iterator)
static int	single(PrimitiveIntIterator iterator, int defaultItem)
static PrimitiveIntIterator	singleton(int item)
static PrimitiveIntIterator	skip(PrimitiveIntIterator source, int skipTheFirstNItems)
static List<Integer>	toList(PrimitiveIntIterator iterator) Pulls all items from the iterator and puts them into a List, boxing each int.
static PrimitiveIntIterator	toPrimitiveIterator(Iterator<Integer> iterator)
static Set<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

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

Constructor Detail

PrimitiveIntCollections

public PrimitiveIntCollections()

Method Detail

iterator

public static PrimitiveIntIterator iterator(int... items)

reversed

public static PrimitiveIntIterator reversed(int... items)

reversed

public static PrimitiveIntIterator reversed(PrimitiveIntIterator source)

concat

public static PrimitiveIntIterator concat(Iterator<PrimitiveIntIterator> iterators)

prepend

public static PrimitiveIntIterator prepend(int item,
                                           PrimitiveIntIterator iterator)

append

public static PrimitiveIntIterator append(PrimitiveIntIterator iterator,
                                          int item)

filter

public static PrimitiveIntIterator filter(PrimitiveIntIterator source,
                                          IntPredicate filter)

deduplicate

public static PrimitiveIntIterator deduplicate(PrimitiveIntIterator source)

not

public static PrimitiveIntIterator not(PrimitiveIntIterator source,
                                       int disallowedValue)

skip

public static PrimitiveIntIterator skip(PrimitiveIntIterator source,
                                        int skipTheFirstNItems)

limit

public static PrimitiveIntIterator limit(PrimitiveIntIterator source,
                                         int maxItems)

range

public static PrimitiveIntIterator range(int end)

range

public static PrimitiveIntIterator range(int start,
                                         int end)

range

public static PrimitiveIntIterator range(int start,
                                         int end,
                                         int stride)

singleton

public static PrimitiveIntIterator singleton(int item)

first

public static int first(PrimitiveIntIterator iterator)

first

public static int first(PrimitiveIntIterator iterator,
                        int defaultItem)

last

public static int last(PrimitiveIntIterator iterator)

last

public static int last(PrimitiveIntIterator iterator,
                       int defaultItem)

single

public static int single(PrimitiveIntIterator iterator)

single

public static int single(PrimitiveIntIterator iterator,
                         int defaultItem)

itemAt

public static int itemAt(PrimitiveIntIterator iterator,
                         int index)

itemAt

public static int itemAt(PrimitiveIntIterator iterator,
                         int index,
                         int defaultItem)

indexOf

public static int indexOf(PrimitiveIntIterator iterator,
                          int 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(PrimitiveIntIterator first,
                             PrimitiveIntIterator 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 PrimitiveIntSet asSet(PrimitiveIntIterator iterator)

asSetAllowDuplicates

public static PrimitiveIntSet asSetAllowDuplicates(PrimitiveIntIterator iterator)

count

public static int count(PrimitiveIntIterator iterator)

asArray

public static int[] asArray(PrimitiveIntIterator iterator)

asArray

public static int[] asArray(Collection<Integer> values)

emptyIterator

public static PrimitiveIntIterator emptyIterator()

emptySet

public static PrimitiveIntSet emptySet()

toPrimitiveIterator

public static PrimitiveIntIterator toPrimitiveIterator(Iterator<Integer> iterator)

flatten

public static PrimitiveIntIterator flatten(Iterator<PrimitiveIntIterator> source)

map

public static <T> Iterator<T> map(IntFunction<T> mapFunction,
                                  PrimitiveIntIterator source)

consume

public static void consume(PrimitiveIntIterator source,
                           IntConsumer consumer)

constant

public static PrimitiveIntIterator constant(int value)

asSet

public static PrimitiveIntSet asSet(int[] values)

asSet

public static PrimitiveIntSet asSet(long[] values,
                                    LongToIntFunction converter)

contains

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

toList

public static List<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 Set<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:

IllegalStateException - for the first encountered duplicate.

mapToSet

public static <T> Set<T> mapToSet(PrimitiveIntIterator iterator,
                                  IntFunction<T> map)

deduplicate

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

Deduplicates values in the sorted 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.