1 /* 2 * $Header: /home/projects/jaxen/scm/jaxen/src/java/main/org/jaxen/pattern/NamespaceTest.java,v 1.6 2006/02/05 21:47:42 elharo Exp $ 3 * $Revision: 1.6 $ 4 * $Date: 2006/02/05 21:47:42 $ 5 * 6 * ==================================================================== 7 * 8 * Copyright 2000-2002 bob mcwhirter & James Strachan. 9 * All rights reserved. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions are 13 * met: 14 * 15 * * Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 18 * * Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 22 * * Neither the name of the Jaxen Project nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS 27 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A 29 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER 30 * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 31 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 32 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 33 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 34 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 35 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 36 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 37 * 38 * ==================================================================== 39 * This software consists of voluntary contributions made by many 40 * individuals on behalf of the Jaxen Project and was originally 41 * created by bob mcwhirter <bob@werken.com> and 42 * James Strachan <jstrachan@apache.org>. For more information on the 43 * Jaxen Project, please see <http://www.jaxen.org/>. 44 * 45 * $Id: NamespaceTest.java,v 1.6 2006/02/05 21:47:42 elharo Exp $ 46 */ 47 48 package org.jaxen.pattern; 49 50 import org.jaxen.Context; 51 import org.jaxen.Navigator; 52 53 /*** <p><code>NamespaceTest</code> tests for a given namespace URI.</p> 54 * 55 * @author <a href="mailto:jstrachan@apache.org">James Strachan</a> 56 * @version $Revision: 1.6 $ 57 */ 58 public class NamespaceTest extends NodeTest { 59 60 /*** The prefix to match against */ 61 private String prefix; 62 63 /*** The type of node to match - either attribute or element */ 64 private short nodeType; 65 66 public NamespaceTest(String prefix, short nodeType) 67 { 68 if ( prefix == null ) 69 { 70 prefix = ""; 71 } 72 this.prefix = prefix; 73 this.nodeType = nodeType; 74 } 75 76 /*** @return true if the pattern matches the given node 77 */ 78 public boolean matches( Object node, Context context ) 79 { 80 Navigator navigator = context.getNavigator(); 81 String uri = getURI( node, context ); 82 83 if ( nodeType == Pattern.ELEMENT_NODE ) 84 { 85 return navigator.isElement( node ) 86 && uri.equals( navigator.getElementNamespaceUri( node ) ); 87 } 88 else if ( nodeType == Pattern.ATTRIBUTE_NODE ) 89 { 90 return navigator.isAttribute( node ) 91 && uri.equals( navigator.getAttributeNamespaceUri( node ) ); 92 } 93 return false; 94 } 95 96 public double getPriority() 97 { 98 return -0.25; 99 } 100 101 102 public short getMatchType() 103 { 104 return nodeType; 105 } 106 107 public String getText() 108 { 109 return prefix + ":"; 110 } 111 112 public String toString() 113 { 114 return super.toString() + "[ prefix: " + prefix + " type: " + nodeType + " ]"; 115 } 116 117 /*** Returns the URI of the current prefix or "" if no URI can be found 118 */ 119 protected String getURI(Object node, Context context) 120 { 121 String uri = context.getNavigator().translateNamespacePrefixToUri( prefix, node ); 122 if ( uri == null ) 123 { 124 uri = context.getContextSupport().translateNamespacePrefixToUri( prefix ); 125 } 126 if ( uri == null ) 127 { 128 uri = ""; 129 } 130 return uri; 131 } 132 }