Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||||||
NamespaceUriFunction |
|
| 9.333333333333334;9.333 |
1 | /* |
|
2 | * $Header: /home/projects/jaxen/scm/jaxen/src/java/main/org/jaxen/function/NamespaceUriFunction.java,v 1.12 2005/06/28 13:44:45 elharo Exp $ |
|
3 | * $Revision: 1.12 $ |
|
4 | * $Date: 2005/06/28 13:44:45 $ |
|
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: NamespaceUriFunction.java,v 1.12 2005/06/28 13:44:45 elharo Exp $ |
|
60 | */ |
|
61 | ||
62 | ||
63 | package org.jaxen.function; |
|
64 | ||
65 | import java.util.List; |
|
66 | ||
67 | import org.jaxen.Context; |
|
68 | import org.jaxen.Function; |
|
69 | import org.jaxen.FunctionCallException; |
|
70 | import org.jaxen.Navigator; |
|
71 | ||
72 | /** |
|
73 | * <p> |
|
74 | * <b>4.1</b> |
|
75 | * <code><i>string</i> namespace-uri(<i>node-set?</i>)</code> |
|
76 | * </p> |
|
77 | * |
|
78 | * <blockquote src="http://www.w3.org/TR/xpath"> |
|
79 | * <p> |
|
80 | * The <b>namespace-uri</b> |
|
81 | * function returns the namespace URI of the <a |
|
82 | * href="http://www.w3.org/TR/xpath#dt-expanded-name" target="_top">expanded-name</a> of the node in the |
|
83 | * argument node-set that is first in <a |
|
84 | * href="http://www.w3.org/TR/xpath#dt-document-order" target="_top">document order</a>. If the argument |
|
85 | * node-set is empty, the first node has no <a |
|
86 | * href="http://www.w3.org/TR/xpath#dt-expanded-name" target="_top">expanded-name</a>, or the namespace URI of |
|
87 | * the <a href="http://www.w3.org/TR/xpath#dt-expanded-name" target="_top">expanded-name</a> is null, an empty |
|
88 | * string is returned. If the argument is omitted, it defaults to a |
|
89 | * node-set with the context node as its only member. |
|
90 | * </p> |
|
91 | * |
|
92 | * <blockquote> <b>NOTE: </b>The string returned by the <b>namespace-uri</b> function will |
|
93 | * be empty except for element nodes and attribute nodes.</blockquote> |
|
94 | * |
|
95 | * </blockquote> |
|
96 | * |
|
97 | * @author bob mcwhirter (bob @ werken.com) |
|
98 | * @see <a href="http://www.w3.org/TR/xpath#function-namespace-uri" |
|
99 | * target="_top">Section 4.1 of the XPath Specification</a> |
|
100 | */ |
|
101 | public class NamespaceUriFunction implements Function |
|
102 | { |
|
103 | ||
104 | /** |
|
105 | * Create a new <code>NamespaceUriFunction</code> object. |
|
106 | */ |
|
107 | 294 | public NamespaceUriFunction() {} |
108 | ||
109 | /** |
|
110 | * Returns the namespace URI of the specified node or the namespace URI of the context node if |
|
111 | * no arguments are provided. |
|
112 | * |
|
113 | * @param context the context at the point in the |
|
114 | * expression where the function is called |
|
115 | * @param args a <code>List</code> containing zero or one items |
|
116 | * |
|
117 | * @return a <code>String</code> containing the namespace URI |
|
118 | * |
|
119 | * @throws FunctionCallException if <code>args</code> has more than one item |
|
120 | */ |
|
121 | public Object call(Context context, |
|
122 | List args) throws FunctionCallException |
|
123 | { |
|
124 | 276 | if (args.size() == 0) |
125 | { |
|
126 | 222 | return evaluate( context.getNodeSet(), |
127 | context.getNavigator() ); |
|
128 | } |
|
129 | ||
130 | 54 | if ( args.size() == 1 ) |
131 | { |
|
132 | 48 | return evaluate( args, |
133 | context.getNavigator() ); |
|
134 | } |
|
135 | ||
136 | 6 | throw new FunctionCallException( "namespace-uri() requires zero or one argument." ); |
137 | } |
|
138 | ||
139 | /** |
|
140 | * Returns the namespace URI of <code>list.get(0)</code> |
|
141 | * |
|
142 | * @param list a list of nodes |
|
143 | * @param nav the <code>Navigator</code> used to retrieve the namespace |
|
144 | * |
|
145 | * @return the namespace URI of <code>list.get(0)</code> |
|
146 | * |
|
147 | * @throws FunctionCallException if <code>list.get(0)</code> is not a node |
|
148 | */ |
|
149 | public static String evaluate(List list, |
|
150 | Navigator nav) throws FunctionCallException |
|
151 | { |
|
152 | 312 | if ( ! list.isEmpty() ) |
153 | { |
|
154 | 300 | Object first = list.get(0); |
155 | ||
156 | 300 | if ( first instanceof List ) |
157 | { |
|
158 | 42 | return evaluate( (List) first, |
159 | nav ); |
|
160 | } |
|
161 | 258 | else if ( nav.isElement( first ) ) |
162 | { |
|
163 | 216 | return nav.getElementNamespaceUri( first ); |
164 | } |
|
165 | 42 | else if ( nav.isAttribute( first ) ) |
166 | { |
|
167 | 12 | String uri = nav.getAttributeNamespaceUri( first ); |
168 | 12 | if (uri == null) return ""; |
169 | 6 | return uri; |
170 | } |
|
171 | 30 | else if ( nav.isProcessingInstruction( first ) ) |
172 | { |
|
173 | 6 | return ""; |
174 | } |
|
175 | 24 | else if ( nav.isNamespace( first ) ) |
176 | { |
|
177 | 6 | return ""; |
178 | } |
|
179 | 18 | else if ( nav.isDocument( first ) ) |
180 | { |
|
181 | 6 | return ""; |
182 | } |
|
183 | 12 | else if ( nav.isComment( first ) ) |
184 | { |
|
185 | 0 | return ""; |
186 | } |
|
187 | 12 | else if ( nav.isText( first ) ) |
188 | { |
|
189 | 6 | return ""; |
190 | } |
|
191 | else { |
|
192 | 6 | throw new FunctionCallException( |
193 | "The argument to the namespace-uri function must be a node-set"); |
|
194 | } |
|
195 | ||
196 | } |
|
197 | ||
198 | 12 | return ""; |
199 | ||
200 | } |
|
201 | } |
|
202 |