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: DefaultNamespace.java,v 1.13 2004/06/25 08:03:41 maartenc Exp $ 8 */ 9 10 package org.dom4j.tree; 11 12 import org.dom4j.Element; 13 import org.dom4j.Namespace; 14 15 /*** <p><code>DefaultNamespace</code> implements a doubly linked node which 16 * supports the parent relationship and is mutable. 17 * It is useful when returning results from XPath expressions.</p> 18 * 19 * @author <a href="mailto:jstrachan@apache.org">James Strachan</a> 20 * @version $Revision: 1.13 $ 21 */ 22 public class DefaultNamespace extends Namespace { 23 24 /*** The parent of this node */ 25 private Element parent; 26 27 /*** @param prefix is the prefix for this namespace 28 * @param uri is the URI for this namespace 29 */ 30 public DefaultNamespace(String prefix,String uri) { 31 super( prefix, uri ); 32 } 33 34 /*** @param parent is the parent element 35 * @param prefix is the prefix for this namespace 36 * @param uri is the URI for this namespace 37 */ 38 public DefaultNamespace(Element parent,String prefix,String uri) { 39 super( prefix, uri ); 40 this.parent = parent; 41 } 42 43 /*** @return the hash code based on the qualified name and the URI of the 44 * namespace and the hashCode() of the parent element. 45 */ 46 protected int createHashCode() { 47 int hashCode = super.createHashCode(); 48 if ( parent != null ) { 49 hashCode ^= parent.hashCode(); 50 } 51 return hashCode; 52 } 53 54 /*** Implements an identity based comparsion using the parent element as well as 55 * the prefix and URI 56 */ 57 public boolean equals(Object object) { 58 if ( object instanceof DefaultNamespace ) { 59 DefaultNamespace that = (DefaultNamespace) object; 60 if ( that.parent == parent ) { 61 return super.equals( object ); 62 } 63 } 64 return false; 65 } 66 67 68 public Element getParent() { 69 return parent; 70 } 71 72 public void setParent(Element parent) { 73 this.parent = parent; 74 } 75 76 public boolean supportsParent() { 77 return true; 78 } 79 } 80 81 82 83 84 /* 85 * Redistribution and use of this software and associated documentation 86 * ("Software"), with or without modification, are permitted provided 87 * that the following conditions are met: 88 * 89 * 1. Redistributions of source code must retain copyright 90 * statements and notices. Redistributions must also contain a 91 * copy of this document. 92 * 93 * 2. Redistributions in binary form must reproduce the 94 * above copyright notice, this list of conditions and the 95 * following disclaimer in the documentation and/or other 96 * materials provided with the distribution. 97 * 98 * 3. The name "DOM4J" must not be used to endorse or promote 99 * products derived from this Software without prior written 100 * permission of MetaStuff, Ltd. For written permission, 101 * please contact dom4j-info@metastuff.com. 102 * 103 * 4. Products derived from this Software may not be called "DOM4J" 104 * nor may "DOM4J" appear in their names without prior written 105 * permission of MetaStuff, Ltd. DOM4J is a registered 106 * trademark of MetaStuff, Ltd. 107 * 108 * 5. Due credit should be given to the DOM4J Project - 109 * http://www.dom4j.org 110 * 111 * THIS SOFTWARE IS PROVIDED BY METASTUFF, LTD. AND CONTRIBUTORS 112 * ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT 113 * NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND 114 * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL 115 * METASTUFF, LTD. OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 116 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 117 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 118 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 119 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 120 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 121 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 122 * OF THE POSSIBILITY OF SUCH DAMAGE. 123 * 124 * Copyright 2001-2004 (C) MetaStuff, Ltd. All Rights Reserved. 125 * 126 * $Id: DefaultNamespace.java,v 1.13 2004/06/25 08:03:41 maartenc Exp $ 127 */