org.apache.commons.collections4.iterators

Class ObjectArrayIterator<E>

java.lang.Object

org.apache.commons.collections4.iterators.ObjectArrayIterator<E>

Type Parameters:

E - the type to iterate over

All Implemented Interfaces:

java.util.Iterator<E>, ResettableIterator<E>

Direct Known Subclasses:

ObjectArrayListIterator

public class ObjectArrayIterator<E>
extends java.lang.Object
implements ResettableIterator<E>

An Iterator over an array of objects.

This iterator does not support remove(), as the object array cannot be structurally modified.

The iterator implements a reset() method, allowing the reset of the iterator back to the start if required.

Since:

3.0

Constructor Summary

Constructors

Constructor and Description
ObjectArrayIterator(E... array) Constructs an ObjectArrayIterator that will iterate over the values in the specified array.
ObjectArrayIterator(E[] array, int start) Constructs an ObjectArrayIterator that will iterate over the values in the specified array from a specific start index.
ObjectArrayIterator(E[] array, int start, int end) Construct an ObjectArrayIterator that will iterate over a range of values in the specified array.

Method Summary

Modifier and Type	Method and Description
E[]	getArray() Gets the array that this iterator is iterating over.
int	getEndIndex() Gets the end index to loop to.
int	getStartIndex() Gets the start index to loop from.
boolean	hasNext() Returns true if there are more elements to return from the array.
E	next() Returns the next element in the array.
void	remove() Throws UnsupportedOperationException.
void	reset() Resets the iterator back to the start index.

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Iterator

forEachRemaining

Constructor Detail

ObjectArrayIterator

public ObjectArrayIterator(E... array)

Constructs an ObjectArrayIterator that will iterate over the values in the specified array.

Parameters:

array - the array to iterate over

Throws:

java.lang.NullPointerException - if array is null

ObjectArrayIterator

public ObjectArrayIterator(E[] array,
                           int start)

Constructs an ObjectArrayIterator that will iterate over the values in the specified array from a specific start index.

Parameters:

array - the array to iterate over

start - the index to start iterating at

Throws:

java.lang.NullPointerException - if array is null

java.lang.IndexOutOfBoundsException - if the start index is out of bounds

ObjectArrayIterator

public ObjectArrayIterator(E[] array,
                           int start,
                           int end)

Construct an ObjectArrayIterator that will iterate over a range of values in the specified array.

Parameters:

array - the array to iterate over

start - the index to start iterating at

end - the index (exclusive) to finish iterating at

Throws:

java.lang.IndexOutOfBoundsException - if the start or end index is out of bounds

java.lang.IllegalArgumentException - if end index is before the start

java.lang.NullPointerException - if array is null

Method Detail

hasNext

public boolean hasNext()

Returns true if there are more elements to return from the array.

Specified by:

hasNext in interface java.util.Iterator<E>

Returns:

true if there is a next element to return

next

public E next()

Returns the next element in the array.

Specified by:

next in interface java.util.Iterator<E>

Returns:

the next element in the array

Throws:

java.util.NoSuchElementException - if all the elements in the array have already been returned

remove

public void remove()

Throws UnsupportedOperationException.

Specified by:

remove in interface java.util.Iterator<E>

Throws:

java.lang.UnsupportedOperationException - always

getArray

public E[] getArray()

Gets the array that this iterator is iterating over.

Returns:

the array this iterator iterates over

getStartIndex

public int getStartIndex()

Gets the start index to loop from.

Returns:

the start index

getEndIndex

public int getEndIndex()

Gets the end index to loop to.

Returns:

the end index

reset

public void reset()

Resets the iterator back to the start index.

Specified by:

reset in interface ResettableIterator<E>