1 /* 2 * Copyright 2001-2004 (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: DefaultNamespaceContext.java,v 1.7 2004/06/25 08:03:42 maartenc Exp $ 8 */ 9 10 package org.dom4j.xpath; 11 12 import java.io.Serializable; 13 14 import org.dom4j.Document; 15 import org.dom4j.Element; 16 import org.dom4j.Namespace; 17 import org.dom4j.Node; 18 import org.jaxen.NamespaceContext; 19 20 21 /*** <p><code>DefaultNamespaceContext</code> implements a Jaxen 22 * NamespaceContext such that a context node is used 23 * to determine the current XPath namespace prefixes and namespace URIs 24 * available.</p> 25 * 26 * @author <a href="mailto:jstrachan@apache.org">James Strachan</a> 27 */ 28 public class DefaultNamespaceContext implements NamespaceContext, Serializable { 29 30 private final Element element; 31 32 public DefaultNamespaceContext(Element element) { 33 this.element = element; 34 } 35 36 public static DefaultNamespaceContext create(Object node) { 37 Element element = null; 38 if ( node instanceof Element ) { 39 element = (Element) node; 40 } 41 else if ( node instanceof Document ) { 42 Document doc = (Document) node; 43 element = doc.getRootElement(); 44 } 45 else if ( node instanceof Node ) { 46 element = ((Node) node).getParent(); 47 } 48 if (element != null) { 49 return new DefaultNamespaceContext(element); 50 } 51 return null; 52 } 53 54 public String translateNamespacePrefixToUri(String 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 68 /* 69 * Redistribution and use of this software and associated documentation 70 * ("Software"), with or without modification, are permitted provided 71 * that the following conditions are met: 72 * 73 * 1. Redistributions of source code must retain copyright 74 * statements and notices. Redistributions must also contain a 75 * copy of this document. 76 * 77 * 2. Redistributions in binary form must reproduce the 78 * above copyright notice, this list of conditions and the 79 * following disclaimer in the documentation and/or other 80 * materials provided with the distribution. 81 * 82 * 3. The name "DOM4J" must not be used to endorse or promote 83 * products derived from this Software without prior written 84 * permission of MetaStuff, Ltd. For written permission, 85 * please contact dom4j-info@metastuff.com. 86 * 87 * 4. Products derived from this Software may not be called "DOM4J" 88 * nor may "DOM4J" appear in their names without prior written 89 * permission of MetaStuff, Ltd. DOM4J is a registered 90 * trademark of MetaStuff, Ltd. 91 * 92 * 5. Due credit should be given to the DOM4J Project - 93 * http://www.dom4j.org 94 * 95 * THIS SOFTWARE IS PROVIDED BY METASTUFF, LTD. AND CONTRIBUTORS 96 * ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT 97 * NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND 98 * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL 99 * METASTUFF, LTD. OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 100 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 101 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 102 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 103 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 104 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 105 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 106 * OF THE POSSIBILITY OF SUCH DAMAGE. 107 * 108 * Copyright 2001-2004 (C) MetaStuff, Ltd. All Rights Reserved. 109 * 110 * $Id: DefaultNamespaceContext.java,v 1.7 2004/06/25 08:03:42 maartenc Exp $ 111 */