Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
NameFunction |
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| 8.666666666666666;8.667 |
1 | /* | |
2 | * $Header: /home/projects/jaxen/scm/jaxen/src/java/main/org/jaxen/function/NameFunction.java,v 1.11 2006/02/05 21:47:41 elharo Exp $ | |
3 | * $Revision: 1.11 $ | |
4 | * $Date: 2006/02/05 21:47:41 $ | |
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: NameFunction.java,v 1.11 2006/02/05 21:47:41 elharo Exp $ | |
46 | */ | |
47 | ||
48 | ||
49 | package org.jaxen.function; | |
50 | ||
51 | import java.util.List; | |
52 | ||
53 | import org.jaxen.Context; | |
54 | import org.jaxen.Function; | |
55 | import org.jaxen.FunctionCallException; | |
56 | import org.jaxen.Navigator; | |
57 | ||
58 | /** | |
59 | * <p><b>4.1</b> <code><i>string</i> name(<i>node-set?</i>)</code> </p> | |
60 | * | |
61 | * | |
62 | * <blockquote src="http://www.w3.org/TR/xpath"> | |
63 | * The <b>name</b> function returns a string containing a QName representing | |
64 | * the expanded-name of the node in the argument node-set that is first in document order. | |
65 | * The QName must represent the expanded-name with respect to the namespace declarations | |
66 | * in effect on the node whose expanded-name is being represented. Typically, this will | |
67 | * be the QName that occurred in the XML source....If | |
68 | * the argument node-set is empty or the first node has | |
69 | * no expanded-name, an empty string is returned. | |
70 | * If the argument it omitted, it defaults to a node-set with the context node as its only member. | |
71 | * </blockquote> | |
72 | * | |
73 | * @author bob mcwhirter (bob @ werken.com) | |
74 | * | |
75 | * @see <a href="http://www.w3.org/TR/xpath#function-name" target="_top">Section 4.1 of the XPath Specification</a> | |
76 | */ | |
77 | public class NameFunction implements Function | |
78 | { | |
79 | ||
80 | ||
81 | /** | |
82 | * Create a new <code>NameFunction</code> object. | |
83 | */ | |
84 | 106 | public NameFunction() {} |
85 | ||
86 | /** | |
87 | * Returns the name of the specified node or the name of the context node if | |
88 | * no arguments are provided. | |
89 | * | |
90 | * @param context the context at the point in the | |
91 | * expression where the function is called | |
92 | * @param args a <code>List</code> containing zero or one items | |
93 | * | |
94 | * @return a <code>String</code> containing the name | |
95 | * | |
96 | * @throws FunctionCallException if <code>args</code> has more than one item | |
97 | */ | |
98 | public Object call(Context context, | |
99 | List args) throws FunctionCallException | |
100 | { | |
101 | 316 | if ( args.size() == 0 ) |
102 | { | |
103 | 78 | return evaluate( context.getNodeSet(), |
104 | context.getNavigator() ); | |
105 | } | |
106 | ||
107 | 238 | if ( args.size() == 1 ) |
108 | { | |
109 | 236 | return evaluate( args, |
110 | context.getNavigator() ); | |
111 | } | |
112 | ||
113 | 2 | throw new FunctionCallException( "name() requires zero or one argument." ); |
114 | } | |
115 | ||
116 | /** | |
117 | * Returns the name of <code>list.get(0)</code> | |
118 | * | |
119 | * @param list a list of nodes | |
120 | * @param nav the <code>Navigator</code> used to retrieve the name | |
121 | * | |
122 | * @return the name of <code>list.get(0)</code> | |
123 | * | |
124 | * @throws FunctionCallException if <code>list.get(0)</code> is not a node | |
125 | */ | |
126 | public static String evaluate(List list, | |
127 | Navigator nav) throws FunctionCallException | |
128 | { | |
129 | 548 | if ( ! list.isEmpty() ) |
130 | { | |
131 | 532 | Object first = list.get(0); |
132 | ||
133 | 532 | if (first instanceof List) |
134 | { | |
135 | 234 | return evaluate( (List) first, |
136 | nav ); | |
137 | } | |
138 | 298 | else if ( nav.isElement( first ) ) |
139 | { | |
140 | 214 | return nav.getElementQName( first ); |
141 | } | |
142 | 84 | else if ( nav.isAttribute( first ) ) |
143 | { | |
144 | 2 | return nav.getAttributeQName( first ); |
145 | } | |
146 | 82 | else if ( nav.isProcessingInstruction( first ) ) |
147 | { | |
148 | 2 | return nav.getProcessingInstructionTarget( first ); |
149 | } | |
150 | 80 | else if ( nav.isNamespace( first ) ) |
151 | { | |
152 | 16 | return nav.getNamespacePrefix( first ); |
153 | } | |
154 | 64 | else if ( nav.isDocument( first ) ) |
155 | { | |
156 | 58 | return ""; |
157 | } | |
158 | 6 | else if ( nav.isComment( first ) ) |
159 | { | |
160 | 2 | return ""; |
161 | } | |
162 | 4 | else if ( nav.isText( first ) ) |
163 | { | |
164 | 2 | return ""; |
165 | } | |
166 | else { | |
167 | 2 | throw new FunctionCallException("The argument to the name function must be a node-set"); |
168 | } | |
169 | } | |
170 | ||
171 | 16 | return ""; |
172 | ||
173 | } | |
174 | ||
175 | } |