org.beryx.streamplify.partperm

Class LongPartialPermutations

java.lang.Object

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

org.beryx.streamplify.partperm.LongPartialPermutations

All Implemented Interfaces:

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

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

Provides streams of partial permutations.
Can be used for partial permutations with a maximum length of 18. For bigger values, a BigIntegerPartialPermutations 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
LongPartialPermutations(int length) Constructs partial permutations of length elements

Method Summary

Modifier and Type	Method and Description
static long	numberOfPermutations(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

LongPartialPermutations

public LongPartialPermutations(int length)

Constructs partial permutations of length elements

Method Detail

numberOfPermutations

public static long numberOfPermutations(int n)

Throws:

java.lang.IllegalArgumentException - if n is negative or the result does not fit in a long (that is, n > 18)