1 /*
2 * $Header: /home/projects/jaxen/scm/jaxen/src/java/main/org/jaxen/expr/DefaultAbsoluteLocationPath.java,v 1.15 2005/09/06 13:41:01 elharo Exp $
3 * $Revision: 1.15 $
4 * $Date: 2005/09/06 13:41:01 $
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: DefaultAbsoluteLocationPath.java,v 1.15 2005/09/06 13:41:01 elharo Exp $
60 */
61 package org.jaxen.expr;
62
63 import java.util.Collections;
64 import java.util.List;
65
66 import org.jaxen.Context;
67 import org.jaxen.ContextSupport;
68 import org.jaxen.JaxenException;
69 import org.jaxen.Navigator;
70 import org.jaxen.util.SingletonList;
71
72 /***
73 * @deprecated this class will become non-public in the future;
74 * use the interface instead
75 */
76 public class DefaultAbsoluteLocationPath extends DefaultLocationPath
77 {
78 public DefaultAbsoluteLocationPath()
79 {
80 }
81
82 public String toString()
83 {
84 return "[(DefaultAbsoluteLocationPath): " + super.toString() + "]";
85 }
86
87 public boolean isAbsolute()
88 {
89 return true;
90 }
91
92 public String getText()
93 {
94 return "/" + super.getText();
95 }
96
97 public Object evaluate(Context context) throws JaxenException
98 {
99 ContextSupport support = context.getContextSupport();
100 Navigator nav = support.getNavigator();
101 Context absContext = new Context( support );
102 List contextNodes = context.getNodeSet();
103
104 if ( contextNodes.isEmpty() )
105 {
106 return Collections.EMPTY_LIST;
107 }
108
109 Object firstNode = contextNodes.get( 0 );
110 Object docNode = nav.getDocumentNode( firstNode );
111
112 if ( docNode == null )
113 {
114 return Collections.EMPTY_LIST;
115 }
116
117 List list = new SingletonList(docNode);
118
119 absContext.setNodeSet( list );
120
121 return super.evaluate( absContext );
122 }
123
124 public void accept(Visitor visitor)
125 {
126 visitor.visit(this);
127 }
128 }
129