1 /*
2 $Id: IterableAxis.java,v 1.7 2005/01/30 03:07:51 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.io.Serializable;
49 import java.util.Iterator;
50
51 import org.jaxen.ContextSupport;
52 import org.jaxen.UnsupportedAxisException;
53
54 /***
55 * Provide access to the XPath axes.
56 *
57 * @author Bob McWhirter
58 * @author James Strachan
59 * @author Stephen Colebourne
60 */
61 public abstract class IterableAxis implements Serializable {
62
63 /*** The axis type */
64 private int value;
65
66 /***
67 * Constructor.
68 *
69 * @param axisValue
70 */
71 public IterableAxis(int axisValue) {
72 this.value = axisValue;
73 }
74
75 /***
76 * Gets the axis value.
77 *
78 * @return the axis value
79 */
80 public int value() {
81 return this.value;
82 }
83
84 /***
85 * Gets the iterator for a specific xpath axis.
86 *
87 * @param contextNode the current context node to work from
88 * @param support the additional context information
89 */
90 public abstract Iterator iterator(Object contextNode, ContextSupport support) throws UnsupportedAxisException;
91
92 /***
93 * Gets the iterator for a specific XPath axis that supports named access.
94 *
95 * @param contextNode the current context node to work from
96 * @param support the additional context information
97 * @param localName the local name of the nodes to return
98 * @param namespacePrefix the prefix of the namespace of the nodes to return
99 * @param namespaceURI the URI of the namespace of the nodes to return
100 */
101 public Iterator namedAccessIterator(
102 Object contextNode,
103 ContextSupport support,
104 String localName,
105 String namespacePrefix,
106 String namespaceURI)
107 throws UnsupportedAxisException {
108
109 throw new UnsupportedOperationException("Named access unsupported");
110 }
111
112 /***
113 * Does this axis support named access?
114 *
115 * @param support the additional context information
116 * @return true if named access supported. If not iterator() will be used
117 */
118 public boolean supportsNamedAccess(ContextSupport support) {
119 return false;
120 }
121
122 }