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Java > Open Source Codes > com > hp > hpl > jena > rdf > model > NsIterator


1 /*
2  * (c) Copyright 2000, 2001, 2002, 2003, 2004, 2005 Hewlett-Packard Development Company, LP
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  * notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  * notice, this list of conditions and the following disclaimer in the
12  * documentation and/or other materials provided with the distribution.
13  * 3. The name of the author may not be used to endorse or promote products
14  * derived from this software without specific prior written permission.
15
16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26  *
27  * NsIterator.java
28  *
29  * Created on 28 July 2000, 13:42
30  */
31
32 package com.hp.hpl.jena.rdf.model;
33
34 import com.hp.hpl.jena.util.iterator.*;
35
36 /** An iterator which returns namespace URI's.
37  *
38  * <p>RDF iterators are standard Java iterators, except that they
39  * have an extra method that returns a specifically typed object,
40  * in this case a String representing a namespace URI, and have
41  * a <CODE>close()</CODE> method that should be called to free
42  * resources if the application does not complete the iteration.</p>
43  * @author bwm
44  * @version Release='$Name: $' Revision='$Revision: 1.5 $' Date='$Date: 2005/02/21 12:14:20 $'
45  */
46 public interface NsIterator extends ExtendedIterator {
47     
48     /** Return the next namespace name of the iteration.
49      * @throws NoSuchElementException if there are no more to be returned.
50      * @return The next name space URI from the iteration.
51      */
52     public String JavaDoc nextNs();
53 }
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