1 /*
2 $Id$
3
4 Copyright 2003 The Werken Company. All Rights Reserved.
5
6 Redistribution and use in source and binary forms, with or without
7 modification, are permitted provided that the following conditions are
8 met:
9
10 * Redistributions of source code must retain the above copyright
11 notice, this list of conditions and the following disclaimer.
12
13 * Redistributions in binary form must reproduce the above copyright
14 notice, this list of conditions and the following disclaimer in the
15 documentation and/or other materials provided with the distribution.
16
17 * Neither the name of the Jaxen Project nor the names of its
18 contributors may be used to endorse or promote products derived
19 from this software without specific prior written permission.
20
21 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
22 IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
23 TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
24 PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
25 OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
26 EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
27 PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
28 PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
29 LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
30 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
31 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32
33 */
34 package org.jaxen.expr.iter;
35
36 import java.util.Iterator;
37
38 import org.jaxen.ContextSupport;
39 import org.jaxen.NamedAccessNavigator;
40 import org.jaxen.UnsupportedAxisException;
41
42 /**
43 * Provide access to the child xpath axis.
44 *
45 * @author Bob McWhirter
46 * @author James Strachan
47 * @author Stephen Colebourne
48 */
49 public class IterableChildAxis extends IterableAxis {
50
51 private static final long serialVersionUID = 1L;
52
53 /**
54 * Constructor.
55 *
56 * @param value the axis value
57 */
58 public IterableChildAxis(int value) {
59 super(value);
60 }
61
62 /**
63 * Gets the iterator for the child axis.
64 *
65 * @param contextNode the current context node to work from
66 * @param support the additional context information
67 * @return an iterator over the children of the context node
68 * @throws UnsupportedAxisException if the child axis is not supported
69 */
70 public Iterator iterator(Object contextNode, ContextSupport support)
71 throws UnsupportedAxisException {
72 return support.getNavigator().getChildAxisIterator(contextNode);
73 }
74
75 /**
76 * Gets an iterator for the child XPath axis that supports named access.
77 *
78 * @param contextNode the current context node to work from
79 * @param support the additional context information
80 * @param localName the local name of the children to return
81 * @param namespacePrefix the prefix of the namespace of the children to return
82 * @param namespaceURI the URI of the namespace of the children to return
83 * @return an iterator over the children of the context node
84 * @throws UnsupportedAxisException if the child axis is not supported by the model
85 */
86 public Iterator namedAccessIterator(
87 Object contextNode,
88 ContextSupport support,
89 String localName,
90 String namespacePrefix,
91 String namespaceURI)
92 throws UnsupportedAxisException {
93
94 NamedAccessNavigator nav = (NamedAccessNavigator) support.getNavigator();
95 return nav.getChildAxisIterator(contextNode, localName, namespacePrefix, namespaceURI);
96 }
97
98 /**
99 * Does this axis support named access?
100 *
101 * @param support the additional context information
102 * @return true if named access supported. If not iterator() will be used
103 */
104 public boolean supportsNamedAccess(ContextSupport support) {
105 return (support.getNavigator() instanceof NamedAccessNavigator);
106 }
107
108 }