net.sf.staccatocommons.iterators
Class EmptyThriterator<T>

java.lang.Object
  net.sf.staccatocommons.iterators.AbstractUnmodifiableIterator<A>
      net.sf.staccatocommons.iterators.thriter.AbstractThriterator<T>
          net.sf.staccatocommons.iterators.EmptyThriterator<T>

Type Parameters:

T - the element type

All Implemented Interfaces:

Iterator<T>, EmptyAware, Thriter<T>, Thriterator<T>

public final class EmptyThriterator<T>
extends AbstractThriterator<T>

An iterator that retrieves no elements. Calling hasNext() will always return false, and calling next() will throw a NoSuchElementException

Author:

flbulgarelli

Constructor Summary

EmptyThriterator()

Method Summary

void	advanceNext() Advances to the thriter to the position of the next element.
T	current() Answers element at the current position of this Thriter.
static <T> Thriterator<T>	empty()
boolean	hasNext() Answers if the thriter has more elements, that is, if sending Thriter.advanceNext() would not result in a NoSuchElementException
T	next()
String	toString()

Methods inherited from class net.sf.staccatocommons.iterators.thriter.AbstractThriterator

delayedCurrent, delayedNext, isEmpty

Methods inherited from class net.sf.staccatocommons.iterators.AbstractUnmodifiableIterator

remove

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Iterator

remove

Constructor Detail

EmptyThriterator

public EmptyThriterator()

Method Detail

hasNext

public boolean hasNext()

Description copied from interface: Thriter

Answers if the thriter has more elements, that is, if sending Thriter.advanceNext() would not result in a NoSuchElementException

Returns:

if the Thriter has more elements

next

public T next()

advanceNext

public void advanceNext()
                 throws NoSuchElementException

Description copied from interface: Thriter

Advances to the thriter to the position of the next element.

Throws:

NoSuchElementException - if there are no more elements

current

public T current()
          throws NoSuchElementException

Description copied from interface: Thriter

Answers element at the current position of this Thriter. Result of this method if Thriter.advanceNext() was never evaluated before is undefined.

Returns:

the current element

Throws:

NoSuchElementException

empty

@Constant
public static <T> Thriterator<T> empty()

Type Parameters:

T - the type of the iterator element

Returns:

the singleton instance

toString

public String toString()

Overrides:

toString in class Object