com.hp.hpl.jena.rdf.model
Interface NodeIterator

All Superinterfaces:

ClosableIterator, java.util.Iterator

public interface NodeIterator

extends ClosableIterator

An iterator which returns RDF nodes.

RDF iterators are standard Java iterators, except that they have an extra method that returns specifically typed objects, in this case RDF nodes, and have a close() method. thatshould be called to free resources if the application does not complete the iteration.

Version:

Release='$Name: $' Revision='$Revision: 1.5 $' Date='$Date: 2003/06/18 22:30:44 $'

Author:

bwm

Method Summary

void	close() Terminate the iteration and free up resources.
boolean	hasNext() Determine if there any more values in the iteration. .
java.lang.Object	next() Return the next RDFNode of the iteration.
RDFNode	nextNode() Return the next RDFNode of the iteration.
void	remove() Unsupported Operation.

Method Detail

hasNext

public boolean hasNext()

Determine if there any more values in the iteration. .

Specified by:

hasNext in interface java.util.Iterator

Returns:

true if and only if there are more values available from the iteration.

next

public java.lang.Object next()
                      throws java.util.NoSuchElementException

Return the next RDFNode of the iteration.

Specified by:

next in interface java.util.Iterator

Returns:

The next RDFNode from the iteration.

Throws:

java.util.NoSuchElementException - if there are no more nodes to be returned. .

nextNode

public RDFNode nextNode()
                 throws java.util.NoSuchElementException

Return the next RDFNode of the iteration.

Returns:

The next RDFNode from the iteration.

Throws:

java.util.NoSuchElementException - if there are no more nodes to be returned. .

remove

public void remove()
            throws java.util.NoSuchElementException

Unsupported Operation.

Specified by:

remove in interface java.util.Iterator

Throws:

java.util.NoSuchElementException

close

public void close()

Terminate the iteration and free up resources.

Some implementations, e.g. on relational databases, hold resources while the iterator still exists. These will normally be freed when the iteration completes. However, if an application wishes to ensure they are freed without completing the iteration, this method should be called.

.

Specified by:

close in interface ClosableIterator