1 /*
2 * $Header: /home/projects/jaxen/scm/jaxen/src/java/main/org/jaxen/pattern/NamespaceTest.java,v 1.5 2005/06/28 13:44:44 elharo Exp $
3 * $Revision: 1.5 $
4 * $Date: 2005/06/28 13:44:44 $
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 1.5 2005/06/28 13:44:44 elharo 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: 1.5 $
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 }