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 }