ariba.util.core
Class PermutationIterator

java.lang.Object
  ariba.util.core.PermutationIterator

All Implemented Interfaces:

Iterator

public class PermutationIterator
extends Object
implements Iterator

A PermutationIterator produces a series of permutations of the requested size from a source array of objects.

Constructor Summary

PermutationIterator(Object[] source)
Creates a new PermutationIterator for the given source array using all elements of the array.

PermutationIterator(Object[] source, int permSize)
Creates a new PermutationIterator for the given source array where each permutation will be of the given permSize.

Method Summary

boolean	hasNext() Returns true if the PermutationIterator has more elements.
static void	main(String[] args)
Object	next() Returns the next element of this PermutationIterator as an array of Objects.
void	remove()

Methods inherited from class java.lang.Object

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

Constructor Detail

PermutationIterator

public PermutationIterator(Object[] source)

Creates a new PermutationIterator for the given source array using all elements of the array.

PermutationIterator

public PermutationIterator(Object[] source,
                           int permSize)

Creates a new PermutationIterator for the given source array where each permutation will be of the given permSize.

Method Detail

hasNext

public boolean hasNext()

Returns true if the PermutationIterator has more elements.

Specified by:

hasNext in interface Iterator

next

public Object next()

Returns the next element of this PermutationIterator as an array of Objects. Throws a NoSuchElementException if there is no next elemement, i.e. if hasNext() returned false.

Specified by:

next in interface Iterator

remove

public void remove()

Specified by:

remove in interface Iterator

main

public static void main(String[] args)