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1   /*
2    $Id: NamedAccessNavigator.java,v 1.1 2003/07/27 23:14:20 bob Exp $
3   
4    Copyright 2003 (C) The Werken Company. All Rights Reserved.
5    
6    Redistribution and use of this software and associated documentation
7    ("Software"), with or without modification, are permitted provided
8    that the following conditions are met:
9   
10   1. Redistributions of source code must retain copyright
11      statements and notices.  Redistributions must also contain a
12      copy of this document.
13   
14   2. Redistributions in binary form must reproduce the
15      above copyright notice, this list of conditions and the
16      following disclaimer in the documentation and/or other
17      materials provided with the distribution.
18   
19   3. The name "jaxen" must not be used to endorse or promote
20      products derived from this Software without prior written
21      permission of The Werken Company.  For written permission,
22      please contact bob@werken.com.
23   
24   4. Products derived from this Software may not be called "jaxen"
25      nor may "jaxen" appear in their names without prior written
26      permission of The Werken Company. "jaxen" is a registered
27      trademark of The Werken Company.
28   
29   5. Due credit should be given to The Werken Company.
30      (http://jaxen.werken.com/).
31   
32   THIS SOFTWARE IS PROVIDED BY THE WERKEN COMPANY AND CONTRIBUTORS
33   ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
34   NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
35   FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL
36   THE WERKEN COMPANY OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
37   INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
38   (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
39   SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
40   HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
41   STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
42   ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
43   OF THE POSSIBILITY OF SUCH DAMAGE.
44  
45   */
46  package org.jaxen;
47  
48  import java.util.Iterator;
49  
50  /*** 
51   * Interface for navigating around an arbitrary object model
52   * accessing certain parts by name for performance.
53   * <p>
54   * This interface must only be implemented by those models that
55   * can support this named access behaviour.
56   *
57   * @author Stephen Colebourne
58   */
59  public interface NamedAccessNavigator extends Navigator {
60  
61      /***
62       * Retrieve an <code>Iterator</code> that returns the <code>child</code>
63       * xpath axis where the names of the children match the supplied name
64       * and optional namespace.
65       * <p>
66       * This method must only return element nodes with the correct name.
67       * <p>
68       * If the namespaceURI is null, no namespace should be used.
69       * The prefix will never be null.
70       *
71       * @param contextNode  the origin context node
72       * @param localName  the local name of the children to return, always present
73       * @param namespacePrefix  the prefix of the namespace of the children to return
74       * @param namespaceURI  the uri of the namespace of the children to return
75       *
76       * @return an Iterator capable of traversing the named children, or null if none
77       *
78       * @throws UnsupportedAxisException if the semantics of this axis are
79       *         not supported by this object model
80       */
81      Iterator getChildAxisIterator(
82          Object contextNode, 
83          String localName, String namespacePrefix, String namespaceURI)
84              throws UnsupportedAxisException;
85  
86      /***
87       * Retrieve an <code>Iterator</code> that returns the <code>attribute</code>
88       * xpath axis where the names of the attributes match the supplied name
89       * and optional namespace.
90       * <p>
91       * This method must only return attribute nodes with the correct name.
92       * <p>
93       * If the namespaceURI is null, no namespace should be used.
94       * The prefix will never be null.
95       *
96       * @param contextNode  the origin context node
97       * @param localName  the local name of the attributes to return, always present
98       * @param namespacePrefix  the prefix of the namespace of the attributes to return
99       * @param namespaceURI  the uri of the namespace of the attributes to return
100      *
101      * @return an Iterator capable of traversing the named attributes, or null if none
102      *
103      * @throws UnsupportedAxisException is the semantics of this axis are
104      *         not supported by this object model
105      */
106     Iterator getAttributeAxisIterator(
107         Object contextNode, 
108         String localName, String namespacePrefix, String namespaceURI)
109             throws UnsupportedAxisException;
110 
111 }