org.apache.commons.math3.util

Class Combinations.SingletonIterator

java.lang.Object

org.apache.commons.math3.util.Combinations.SingletonIterator

All Implemented Interfaces:

java.util.Iterator<int[]>

Enclosing class:

Combinations

private static class Combinations.SingletonIterator
extends java.lang.Object
implements java.util.Iterator<int[]>

Iterator with just one element to handle degenerate cases (full array, empty array) for combination iterator.

Field Summary

Fields

Modifier and Type	Field and Description
private boolean	more True on initialization, false after first call to next
private int[]	singleton Singleton array

Constructor Summary

Constructors

Constructor and Description
Combinations.SingletonIterator(int[] singleton) Create a singleton iterator providing the given array.

Method Summary

Methods

Modifier and Type	Method and Description
boolean	hasNext()
int[]	next()
void	remove() Not supported

Methods inherited from class java.lang.Object

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

Field Detail

singleton

private final int[] singleton

Singleton array

more

private boolean more

True on initialization, false after first call to next

Constructor Detail

Combinations.SingletonIterator

public Combinations.SingletonIterator(int[] singleton)

Create a singleton iterator providing the given array.

Parameters:

singleton - array returned by the iterator

Method Detail

hasNext

public boolean hasNext()

Specified by:

hasNext in interface java.util.Iterator<int[]>

Returns:

True until next is called the first time, then false

next

public int[] next()

Specified by:

next in interface java.util.Iterator<int[]>

Returns:

the singleton in first activation; throws NSEE thereafter

remove

public void remove()

Not supported

Specified by:

remove in interface java.util.Iterator<int[]>