org.beryx.streamplify.permutation

Class LongPermutations

java.lang.Object

org.beryx.streamplify.LongIndexedSpliterator<int[],LongPermutations>

org.beryx.streamplify.permutation.LongPermutations

All Implemented Interfaces:

java.util.Spliterator<int[]>, Streamable<int[],LongPermutations>

public class LongPermutations
extends LongIndexedSpliterator<int[],LongPermutations>

Provides streams of permutations.
Can be used for permutations with a maximum length of 20. For bigger values, a BigIntegerPermutations is needed.

Nested Class Summary

Nested classes/interfaces inherited from interface java.util.Spliterator

java.util.Spliterator.OfDouble, java.util.Spliterator.OfInt, java.util.Spliterator.OfLong, java.util.Spliterator.OfPrimitive<T,T_CONS,T_SPLITR extends java.util.Spliterator.OfPrimitive<T,T_CONS,T_SPLITR>>

Field Summary

Fields

Modifier and Type	Field and Description
static int	MAX_LENGTH

Fields inherited from interface java.util.Spliterator

CONCURRENT, DISTINCT, IMMUTABLE, NONNULL, ORDERED, SIZED, SORTED, SUBSIZED

Constructor Summary

Constructors

Constructor and Description
LongPermutations(int length) Constructs permutations of length elements

Method Summary

Modifier and Type	Method and Description
static long	factorial(int n)

Methods inherited from class org.beryx.streamplify.LongIndexedSpliterator

bigCount, characteristics, count, estimateSize, forEachRemaining, getFence, getIndex, parallelStream, shuffle, skip, skip, stream, tryAdvance, trySplit, withAdditionalCharacteristics, withShuffler, withValueSupplier

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Spliterator

getComparator, getExactSizeIfKnown, hasCharacteristics

Methods inherited from interface org.beryx.streamplify.Streamable

ordered, shuffle

Field Detail

MAX_LENGTH

public static final int MAX_LENGTH

See Also:

Constant Field Values

Constructor Detail

LongPermutations

public LongPermutations(int length)

Constructs permutations of length elements

Method Detail

factorial

public static long factorial(int n)

Throws:

java.lang.IllegalArgumentException - if n is negative or the result does not fit in a long (that is, n > 20)