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Java > Open Source Codes > org > ozoneDB > xml > dom4j > xpath > OzoneNamespaceContext


1 /*
2  * Copyright 2001 (C) MetaStuff, Ltd. All Rights Reserved.
3  *
4  * This software is open source.
5  * See the bottom of this file for the licence.
6  *
7  * $Id: OzoneNamespaceContext.java,v 1.1 2003/04/25 08:11:52 per_nyfelt Exp $
8  */
9
10 package org.ozoneDB.xml.dom4j.xpath;
11
12 import org.dom4j.Document;
13 import org.dom4j.Element;
14 import org.dom4j.Namespace;
15 import org.dom4j.Node;
16 import org.jaxen.NamespaceContext;
17 import org.ozoneDB.OzoneObject;
18
19
20 /** <p><code>OzoneNamespaceContext</code> implements a Jaxen
21  * NamespaceContext such that a context node is used
22  * to determine the current XPath namespace prefixes and namespace URIs
23  * available.</p>
24  *
25  * @author <a HREF="mailto:jstrachan@apache.org">James Strachan</a>
26  * @author Per Nyfelt
27  */
28 public class OzoneNamespaceContext extends OzoneObject implements NamespaceContext {
29
30     final static long serialVersionUID = 1L;
31
32     private final Element element;
33
34     public OzoneNamespaceContext(Element element) {
35         this.element = element;
36     }
37
38     public static OzoneNamespaceContext create(Object JavaDoc node) {
39         Element element = null;
40         if (node instanceof Element) {
41             element = (Element) node;
42         } else if (node instanceof Document) {
43             Document doc = (Document) node;
44             element = doc.getRootElement();
45         } else if (node instanceof Node) {
46             element = ((Node) node).getParent();
47         }
48         if (element != null) {
49             return new OzoneNamespaceContext(element);
50         }
51         return null;
52     }
53
54     public String JavaDoc translateNamespacePrefixToUri(String JavaDoc prefix) {
55         if (prefix != null && prefix.length() > 0) {
56             Namespace ns = element.getNamespaceForPrefix(prefix);
57             if (ns != null) {
58                 return ns.getURI();
59             }
60         }
61         return null;
62     }
63 }
64
65
66 /*
67  * Redistribution and use of this software and associated documentation
68  * ("Software"), with or without modification, are permitted provided
69  * that the following conditions are met:
70  *
71  * 1. Redistributions of source code must retain copyright
72  * statements and notices. Redistributions must also contain a
73  * copy of this document.
74  *
75  * 2. Redistributions in binary form must reproduce the
76  * above copyright notice, this list of conditions and the
77  * following disclaimer in the documentation and/or other
78  * materials provided with the distribution.
79  *
80  * 3. The name "DOM4J" must not be used to endorse or promote
81  * products derived from this Software without prior written
82  * permission of MetaStuff, Ltd. For written permission,
83  * please contact dom4j-info@metastuff.com.
84  *
85  * 4. Products derived from this Software may not be called "DOM4J"
86  * nor may "DOM4J" appear in their names without prior written
87  * permission of MetaStuff, Ltd. DOM4J is a registered
88  * trademark of MetaStuff, Ltd.
89  *
90  * 5. Due credit should be given to the DOM4J Project
91  * (http://dom4j.org/).
92  *
93  * THIS SOFTWARE IS PROVIDED BY METASTUFF, LTD. AND CONTRIBUTORS
94  * ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
95  * NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
96  * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
97  * METASTUFF, LTD. OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
98  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
99  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
100  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
101  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
102  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
103  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
104  * OF THE POSSIBILITY OF SUCH DAMAGE.
105  *
106  * Copyright 2001 (C) MetaStuff, Ltd. All Rights Reserved.
107  *
108  * $Id: OzoneNamespaceContext.java,v 1.1 2003/04/25 08:11:52 per_nyfelt Exp $
109  */
110
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