1 /*
2 * $Header: /home/projects/jaxen/scm/jaxen/src/java/main/org/jaxen/expr/DefaultAbsoluteLocationPath.java,v 1.18 2006/11/30 18:49:27 elharo Exp $
3 * $Revision: 1.18 $
4 * $Date: 2006/11/30 18:49:27 $
5 *
6 * ====================================================================
7 *
8 * Copyright 2000-2002 bob mcwhirter & James Strachan.
9 * All rights reserved.
10 *
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions are
14 * met:
15 *
16 * * Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 *
19 * * Redistributions in binary form must reproduce the above copyright
20 * notice, this list of conditions and the following disclaimer in the
21 * documentation and/or other materials provided with the distribution.
22 *
23 * * Neither the name of the Jaxen Project nor the names of its
24 * contributors may be used to endorse or promote products derived
25 * from this software without specific prior written permission.
26 *
27 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
28 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
29 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
30 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
31 * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
32 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
33 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
34 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
35 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
36 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
37 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
38 *
39 * ====================================================================
40 * This software consists of voluntary contributions made by many
41 * individuals on behalf of the Jaxen Project and was originally
42 * created by bob mcwhirter <bob@werken.com> and
43 * James Strachan <jstrachan@apache.org>. For more information on the
44 * Jaxen Project, please see <http://www.jaxen.org/>.
45 *
46 * $Id: DefaultAbsoluteLocationPath.java,v 1.18 2006/11/30 18:49:27 elharo Exp $
47 */
48 package org.jaxen.expr;
49
50 import java.util.Collections;
51 import java.util.List;
52
53 import org.jaxen.Context;
54 import org.jaxen.ContextSupport;
55 import org.jaxen.JaxenException;
56 import org.jaxen.Navigator;
57 import org.jaxen.util.SingletonList;
58
59 /***
60 * @deprecated this class will become non-public in the future;
61 * use the interface instead
62 */
63 public class DefaultAbsoluteLocationPath extends DefaultLocationPath
64 {
65 /***
66 *
67 */
68 private static final long serialVersionUID = 2174836928310146874L;
69
70 public DefaultAbsoluteLocationPath()
71 {
72 }
73
74 public String toString()
75 {
76 return "[(DefaultAbsoluteLocationPath): " + super.toString() + "]";
77 }
78
79 public boolean isAbsolute()
80 {
81 return true;
82 }
83
84 public String getText()
85 {
86 return "/" + super.getText();
87 }
88
89 public Object evaluate(Context context) throws JaxenException
90 {
91 ContextSupport support = context.getContextSupport();
92 Navigator nav = support.getNavigator();
93 Context absContext = new Context( support );
94 List contextNodes = context.getNodeSet();
95
96 if ( contextNodes.isEmpty() )
97 {
98 return Collections.EMPTY_LIST;
99 }
100
101 Object firstNode = contextNodes.get( 0 );
102 Object docNode = nav.getDocumentNode( firstNode );
103
104 if ( docNode == null )
105 {
106 return Collections.EMPTY_LIST;
107 }
108
109 List list = new SingletonList(docNode);
110
111 absContext.setNodeSet( list );
112
113 return super.evaluate( absContext );
114 }
115
116 }
117