com.hp.hpl.jena.util
Class NodeIteratorWrapper

java.lang.Object
  |
  +--com.hp.hpl.jena.util.NodeIteratorWrapper

All Implemented Interfaces:

java.util.Iterator

public class NodeIteratorWrapper

extends java.lang.Object

implements java.util.Iterator

A wrapper for NodeIterator that turns it into a standard Java iterator. Clumsy name, and anyway the need for it may go away in a future version of Jena.

Version:

CVS info: $Id: NodeIteratorWrapper.java,v 1.1 2001/09/24 17:02:35 ijd Exp $

Author:

Ian Dickinson, HP Labs (email)

Constructor Summary

NodeIteratorWrapper(NodeIterator nIterator)
Construct an iterator to map a node iterator to a standard java iterator

Method Summary

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

Methods inherited from class java.lang.Object

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

Constructor Detail

NodeIteratorWrapper

public NodeIteratorWrapper(NodeIterator nIterator)

Construct an iterator to map a node iterator to a standard java iterator

Parameters:

nIterator - The NodeIterator we want to wrap

Method Detail

hasNext

public boolean hasNext()

Determine if there any more Nodes in the iteration.

Specified by:

hasNext in interface java.util.Iterator

Returns:

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

next

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

Return the next Node of the iteration.

Specified by:

next in interface java.util.Iterator

Returns:

The next Resource from the iteration.

Throws:

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

remove

public void remove()
            throws java.lang.UnsupportedOperationException

Unsupported Operation.

Specified by:

remove in interface java.util.Iterator

Throws:

{@link - java.lang.UnsupportedOperationException}

close

public void close()
           throws RDFException

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.

Throws:

RDFException - Generic RDF exception.