KickJava   Java API By Example, From Geeks To Geeks.

Java > Open Source Codes > org > jaxen > expr > iter > IterableChildAxis


1 /*
2  $Id: IterableChildAxis.java,v 1.9 2005/06/01 10:24:05 elharo 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.expr.iter;
47
48 import java.util.Iterator JavaDoc;
49
50 import org.jaxen.ContextSupport;
51 import org.jaxen.NamedAccessNavigator;
52 import org.jaxen.UnsupportedAxisException;
53
54 /**
55  * Provide access to the child xpath axis.
56  *
57  * @author Bob McWhirter
58  * @author James Strachan
59  * @author Stephen Colebourne
60  */
61 public class IterableChildAxis extends IterableAxis {
62     
63     /**
64      * Constructor.
65      *
66      * @param value the axis value
67      */
68     public IterableChildAxis(int value) {
69         super(value);
70     }
71
72     /**
73      * Gets the iterator for the child axis.
74      *
75      * @param contextNode the current context node to work from
76      * @param support the additional context information
77      * @return an iterator over the children of the context node
78      * @throws UnsupportedAxisException if the child axis is not supported
79      */
80     public Iterator JavaDoc iterator(Object JavaDoc contextNode, ContextSupport support)
81       throws UnsupportedAxisException {
82         return support.getNavigator().getChildAxisIterator(contextNode);
83     }
84
85     /**
86      * Gets an iterator for the child XPath axis that supports named access.
87      *
88      * @param contextNode the current context node to work from
89      * @param support the additional context information
90      * @param localName the local name of the children to return
91      * @param namespacePrefix the prefix of the namespace of the children to return
92      * @param namespaceURI the URI of the namespace of the children to return
93      * @return an iterator over the children of the context node
94      * @throws UnsupportedAxisException if the child axis is not supported by the model
95      */
96     public Iterator JavaDoc namedAccessIterator(
97         Object JavaDoc contextNode,
98         ContextSupport support,
99         String JavaDoc localName,
100         String JavaDoc namespacePrefix,
101         String JavaDoc namespaceURI)
102             throws UnsupportedAxisException {
103                 
104         NamedAccessNavigator nav = (NamedAccessNavigator) support.getNavigator();
105         return nav.getChildAxisIterator(contextNode, localName, namespacePrefix, namespaceURI);
106     }
107
108     /**
109      * Does this axis support named access?
110      *
111      * @param support the additional context information
112      * @return true if named access supported. If not iterator() will be used
113      */
114     public boolean supportsNamedAccess(ContextSupport support) {
115         return (support.getNavigator() instanceof NamedAccessNavigator);
116     }
117
118 }
119
Popular Tags