Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
LocalNameFunction |
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1 | /* | |
2 | * $Header: /home/projects/jaxen/scm/jaxen/src/java/main/org/jaxen/function/LocalNameFunction.java,v 1.14 2006/02/05 21:47:41 elharo Exp $ | |
3 | * $Revision: 1.14 $ | |
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: LocalNameFunction.java,v 1.14 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> local-name(<i>node-set?</i>)</code></p> | |
60 | * | |
61 | * | |
62 | * <blockquote src="http://www.w3.org/TR/xpath"> | |
63 | * The <b>local-name</b> function returns the local part of the | |
64 | * expanded-name of the node in the argument node-set that is first in document order. | |
65 | * If the argument node-set is empty or the first node has no expanded-name, an | |
66 | * empty string is returned. If the argument is omitted, it defaults to a node-set with the context node as its only member. | |
67 | * | |
68 | * </blockquote> | |
69 | * | |
70 | * @author bob mcwhirter (bob @ werken.com) | |
71 | * @see <a href="http://www.w3.org/TR/xpath#function-local-name" target="_top">Section 4.1 of the XPath Specification</a> | |
72 | */ | |
73 | public class LocalNameFunction implements Function | |
74 | { | |
75 | ||
76 | /** | |
77 | * Create a new <code>LocalNameFunction</code> object. | |
78 | */ | |
79 | 106 | public LocalNameFunction() {} |
80 | ||
81 | /** | |
82 | * Returns the local-name of the specified node or the context node if | |
83 | * no arguments are provided. | |
84 | * | |
85 | * @param context the context at the point in the | |
86 | * expression where the function is called | |
87 | * @param args a <code>List</code> containing zero or one items | |
88 | * | |
89 | * @return a <code>String</code> containing the local-name | |
90 | * | |
91 | * @throws FunctionCallException if <code>args</code> has more than one item | |
92 | */ | |
93 | public Object call(Context context, | |
94 | List args) throws FunctionCallException | |
95 | { | |
96 | 1940 | if ( args.size() == 0 ) |
97 | { | |
98 | 1916 | return evaluate( context.getNodeSet(), |
99 | context.getNavigator() ); | |
100 | } | |
101 | ||
102 | 24 | if ( args.size() == 1 ) |
103 | { | |
104 | 22 | return evaluate( args, |
105 | context.getNavigator() ); | |
106 | } | |
107 | ||
108 | 2 | throw new FunctionCallException( "local-name() requires zero or one argument." ); |
109 | } | |
110 | ||
111 | /** | |
112 | * Returns the local-name of <code>list.get(0)</code> | |
113 | * | |
114 | * @param list a list of nodes | |
115 | * @param nav the <code>Navigator</code> used to retrieve the local name | |
116 | * | |
117 | * @return the local-name of <code>list.get(0)</code> | |
118 | * | |
119 | * @throws FunctionCallException if <code>list.get(0)</code> is not a node | |
120 | */ | |
121 | public static String evaluate(List list, | |
122 | Navigator nav) throws FunctionCallException | |
123 | { | |
124 | 1958 | if ( ! list.isEmpty() ) |
125 | { | |
126 | 1956 | Object first = list.get(0); |
127 | ||
128 | 1956 | if (first instanceof List) |
129 | { | |
130 | 20 | return evaluate( (List) first, |
131 | nav ); | |
132 | } | |
133 | 1936 | else if ( nav.isElement( first ) ) |
134 | { | |
135 | 1922 | return nav.getElementName( first ); |
136 | } | |
137 | 14 | else if ( nav.isAttribute( first ) ) |
138 | { | |
139 | 2 | return nav.getAttributeName( first ); |
140 | } | |
141 | 12 | else if ( nav.isProcessingInstruction( first ) ) |
142 | { | |
143 | 2 | return nav.getProcessingInstructionTarget( first ); |
144 | } | |
145 | 10 | else if ( nav.isNamespace( first ) ) |
146 | { | |
147 | 2 | return nav.getNamespacePrefix( first ); |
148 | } | |
149 | 8 | else if ( nav.isDocument( first ) ) |
150 | { | |
151 | 2 | return ""; |
152 | } | |
153 | 6 | else if ( nav.isComment( first ) ) |
154 | { | |
155 | 2 | return ""; |
156 | } | |
157 | 4 | else if ( nav.isText( first ) ) |
158 | { | |
159 | 2 | return ""; |
160 | } | |
161 | else { | |
162 | 2 | throw new FunctionCallException("The argument to the local-name function must be a node-set"); |
163 | } | |
164 | } | |
165 | ||
166 | 2 | return ""; |
167 | } | |
168 | ||
169 | } | |
170 |