##### Coverage Report - org.jaxen.function.NamespaceUriFunction

Classes in this File | Line Coverage | Branch Coverage | Complexity
NamespaceUriFunction |
96% |
100% |
| 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 |  |
      * ====================================================================
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      *
8 |  |
      * Copyright (C) 2000-2002 bob mcwhirter & James Strachan.
9 |  |
      * All rights reserved.
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      *
11 |  |
      * Redistribution and use in source and binary forms, with or without
12 |  |
      * modification, are permitted provided that the following conditions
13 |  |
      * are met:
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      *
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      * 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.
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      *
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.
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      *
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      * 4. Products derived from this software may not be called "Jaxen", nor
28 |  |
      *    may "Jaxen" appear in their name, without prior written permission
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      *    from the Jaxen Project Management (pm@jaxen.org).
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      *
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      * 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/>."
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      * Alternatively, the acknowledgment may be graphical using the logos
37 |  |
      * available at http://www.jaxen.org/
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      *
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      * 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 |  |
      * ====================================================================
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      * 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 |  |
      *
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      * @author bob mcwhirter (bob @ werken.com)
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      * @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
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          *         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
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          *
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 |  |