org.openrdf.sesame.sail.util
Class EmptyValueIterator

java.lang.Object
  org.openrdf.sesame.sail.util.EmptyValueIterator

All Implemented Interfaces:

ValueIterator

Direct Known Subclasses:

EmptyLiteralIterator, EmptyResourceIterator

public class EmptyValueIterator

extends Object

implements ValueIterator

A ValueIterator that contains exactly zero resources.

Version:

$Revision: 1.4.4.2 $

Constructor Summary

EmptyValueIterator()
Creates an EmptyValueIterator.

Method Summary

void	close() Closes the iterator and frees any resources that it uses (e.g.
boolean	hasNext() Always return false;
Value	next() Always throws a NoSuchElementException as there are no results in an EmptyValueIterator.

Methods inherited from class java.lang.Object

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

Constructor Detail

EmptyValueIterator

public EmptyValueIterator()

Creates an EmptyValueIterator.

Method Detail

hasNext

public boolean hasNext()

Always return false;

Specified by:

hasNext in interface ValueIterator

Returns:

true if there are more values available, false otherwise.

next

public Value next()

Always throws a NoSuchElementException as there are no results in an EmptyValueIterator.

Specified by:

next in interface ValueIterator

Returns:

the next value.

Throws:

NoSuchElementException - Is always thrown.

close

public void close()

Description copied from interface: ValueIterator

Closes the iterator and frees any resources that it uses (e.g. connections to databases). Every ValueIterator should be properly closed when it has returned all of its values, or when it is no longer needed.

Specified by:

close in interface ValueIterator