com.hp.hpl.jena.util
Class StatementObjectIterator

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

All Implemented Interfaces:

NodeIterator

public class StatementObjectIterator

extends java.lang.Object

implements NodeIterator

A wrapper for StmtIterator that projects the object of the statement to form a NodeIterator.

Version:

CVS info: $Id: StatementObjectIterator.java,v 1.1 2001/09/24 17:02:36 ijd Exp $

Author:

Ian Dickinson, HP Labs (email)

Constructor Summary

StatementObjectIterator(StmtIterator sIterator)
Construct an iterator to project the object of the statement out to form a node iterator.

Method Summary

void	close() Terminate the iteration and free up resources.
boolean	hasNext() Determine if there any more Nodes in the iteration.
RDFNode	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

StatementObjectIterator

public StatementObjectIterator(StmtIterator sIterator)

Construct an iterator to project the object of the statement out to form a node iterator.

Parameters:

sIterator - The StmtIterator whose objects will form the elements of the the node iterator.

Method Detail

hasNext

public boolean hasNext()
                throws RDFException

Determine if there any more Nodes in the iteration.

Specified by:

hasNext in interface NodeIterator

Returns:

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

Throws:

RDFException - Generic RDF exception.

next

public RDFNode next()
             throws java.util.NoSuchElementException,
                    RDFException

Return the next Node of the iteration.

Specified by:

next in interface NodeIterator

Returns:

The next Resource from the iteration.

Throws:

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

RDFException - Generic RDF exception.

remove

public void remove()
            throws java.util.NoSuchElementException,
                   RDFException

Unsupported Operation.

Specified by:

remove in interface NodeIterator

Throws:

java.util.NoSuchElementException -

RDFException -

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.

Specified by:

close in interface NodeIterator

Throws:

RDFException - Generic RDF exception.