1 /* 2 * $Header: /home/projects/jaxen/scm/jaxen/src/java/main/org/jaxen/pattern/NamespaceTest.java,v 1.4 2002/05/20 08:34:10 jstrachan Exp $ 3 * $Revision: 1.4 $ 4 * $Date: 2002/05/20 08:34:10 $ 5 * 6 * ==================================================================== 7 * 8 * Copyright (C) 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 13 * are met: 14 * 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions, and the following disclaimer. 17 * 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions, and the disclaimer that follows 20 * these conditions in the documentation and/or other materials 21 * provided with the distribution. 22 * 23 * 3. The name "Jaxen" must not be used to endorse or promote products 24 * derived from this software without prior written permission. For 25 * written permission, please contact license@jaxen.org. 26 * 27 * 4. Products derived from this software may not be called "Jaxen", nor 28 * may "Jaxen" appear in their name, without prior written permission 29 * from the Jaxen Project Management (pm@jaxen.org). 30 * 31 * In addition, we request (but do not require) that you include in the 32 * end-user documentation provided with the redistribution and/or in the 33 * software itself an acknowledgement equivalent to the following: 34 * "This product includes software developed by the 35 * Jaxen Project (http://www.jaxen.org/)." 36 * Alternatively, the acknowledgment may be graphical using the logos 37 * available at http://www.jaxen.org/ 38 * 39 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED 40 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 41 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 42 * DISCLAIMED. IN NO EVENT SHALL THE Jaxen AUTHORS OR THE PROJECT 43 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 45 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 46 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 47 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 48 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 49 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 50 * SUCH DAMAGE. 51 * 52 * ==================================================================== 53 * This software consists of voluntary contributions made by many 54 * individuals on behalf of the Jaxen Project and was originally 55 * created by bob mcwhirter <bob@werken.com> and 56 * James Strachan <jstrachan@apache.org>. For more information on the 57 * Jaxen Project, please see <http://www.jaxen.org/>. 58 * 59 * $Id: NamespaceTest.java,v 1.4 2002/05/20 08:34:10 jstrachan Exp $ 60 */ 61 62 package org.jaxen.pattern; 63 64 import org.jaxen.Context; 65 import org.jaxen.Navigator; 66 67 /*** <p><code>NamespaceTest</code> tests for a given namespace URI.</p> 68 * 69 * @author <a href="mailto:jstrachan@apache.org">James Strachan</a> 70 * @version $Revision: 1.4 $ 71 */ 72 public class NamespaceTest extends NodeTest { 73 74 /*** The prefix to match against */ 75 private String prefix; 76 77 /*** The type of node to match - either attribute or element */ 78 private short nodeType; 79 80 public NamespaceTest(String prefix, short nodeType) 81 { 82 if ( prefix == null ) 83 { 84 prefix = ""; 85 } 86 this.prefix = prefix; 87 this.nodeType = nodeType; 88 } 89 90 /*** @return true if the pattern matches the given node 91 */ 92 public boolean matches( Object node, Context context ) 93 { 94 Navigator navigator = context.getNavigator(); 95 String uri = getURI( node, context ); 96 97 if ( nodeType == Pattern.ELEMENT_NODE ) 98 { 99 return navigator.isElement( node ) 100 && uri.equals( navigator.getElementNamespaceUri( node ) ); 101 } 102 else if ( nodeType == Pattern.ATTRIBUTE_NODE ) 103 { 104 return navigator.isAttribute( node ) 105 && uri.equals( navigator.getAttributeNamespaceUri( node ) ); 106 } 107 return false; 108 } 109 110 public double getPriority() 111 { 112 return -0.25; 113 } 114 115 116 public short getMatchType() 117 { 118 return nodeType; 119 } 120 121 public String getText() 122 { 123 return prefix + ":"; 124 } 125 126 public String toString() 127 { 128 return super.toString() + "[ prefix: " + prefix + " type: " + nodeType + " ]"; 129 } 130 131 /*** Returns the URI of the current prefix or "" if no URI can be found 132 */ 133 protected String getURI(Object node, Context context) 134 { 135 String uri = context.getNavigator().translateNamespacePrefixToUri( prefix, node ); 136 if ( uri == null ) 137 { 138 uri = context.getContextSupport().translateNamespacePrefixToUri( prefix ); 139 } 140 if ( uri == null ) 141 { 142 uri = ""; 143 } 144 return uri; 145 } 146 }