Coverage Report

Coverage Report - org.jaxen.function.NamespaceUriFunction

Classes in this File

Line Coverage

Branch Coverage

Complexity

NamespaceUriFunction

100%

28/28

100%

12/12

9.333

 /*
  * $Header: /home/projects/jaxen/scm/jaxen/src/java/main/org/jaxen/function/NamespaceUriFunction.java,v 1.13 2006/02/05 21:47:41 elharo Exp $
  * $Revision: 1.13 $
  * $Date: 2006/02/05 21:47:41 $
  *
  * ====================================================================
  *
  * Copyright 2000-2002 bob mcwhirter & James Strachan.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  * 
  *   * Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 
  *   * Redistributions in binary form must reproduce the above copyright
  *     notice, this list of conditions and the following disclaimer in the
  *     documentation and/or other materials provided with the distribution.
  * 
  *   * Neither the name of the Jaxen Project nor the names of its
  *     contributors may be used to endorse or promote products derived 
  *     from this software without specific prior written permission.
  * 
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
  * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
  * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
  * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
  * ====================================================================
  * This software consists of voluntary contributions made by many 
  * individuals on behalf of the Jaxen Project and was originally 
  * created by bob mcwhirter <bob@werken.com> and 
  * James Strachan <jstrachan@apache.org>.  For more information on the 
  * Jaxen Project, please see <http://www.jaxen.org/>.
  * 
  * $Id: NamespaceUriFunction.java,v 1.13 2006/02/05 21:47:41 elharo Exp $
  */
 
 
 package org.jaxen.function;
 
 import java.util.List;
 
 import org.jaxen.Context;
 import org.jaxen.Function;
 import org.jaxen.FunctionCallException;
 import org.jaxen.Navigator;
 
 /**
  * <p>
  * <b>4.1</b>
  * <code><i>string</i> namespace-uri(<i>node-set?</i>)</code>
  * </p>
  * 
  * <blockquote src="http://www.w3.org/TR/xpath">
  * <p>
  * The <b>namespace-uri</b>
  * function returns the namespace URI of the <a
  * href="http://www.w3.org/TR/xpath#dt-expanded-name" target="_top">expanded-name</a> of the node in the
  * argument node-set that is first in <a
  * href="http://www.w3.org/TR/xpath#dt-document-order" target="_top">document order</a>. If the argument
  * node-set is empty, the first node has no <a
  * href="http://www.w3.org/TR/xpath#dt-expanded-name" target="_top">expanded-name</a>, or the namespace URI of
  * the <a href="http://www.w3.org/TR/xpath#dt-expanded-name" target="_top">expanded-name</a> is null, an empty
  * string is returned. If the argument is omitted, it defaults to a
  * node-set with the context node as its only member.
  * </p>
  * 
  * <blockquote> <b>NOTE: </b>The string returned by the <b>namespace-uri</b> function will
  * be empty except for element nodes and attribute nodes.</blockquote>
  * 
  * </blockquote>
  * 
  * @author bob mcwhirter (bob @ werken.com)
  * @see <a href="http://www.w3.org/TR/xpath#function-namespace-uri"
  *      target="_top">Section 4.1 of the XPath Specification</a>
  */
 public class NamespaceUriFunction implements Function
 {
 
     /**
      * Create a new <code>NamespaceUriFunction</code> object.
      */
     public NamespaceUriFunction() {}
 
     /**
      * Returns the namespace URI of the specified node or the namespace URI of the context node if 
      * no arguments are provided.
      * 
      * @param context the context at the point in the
      *         expression where the function is called
      * @param args a <code>List</code> containing zero or one items
      * 
      * @return a <code>String</code> containing the namespace URI
      * 
      * @throws FunctionCallException if <code>args</code> has more than one item
      */
     public Object call(Context context,
                        List args) throws FunctionCallException
     {
         if (args.size() == 0)
         {
             return evaluate( context.getNodeSet(),
                              context.getNavigator() );
         }
 
         if ( args.size() == 1 )
         {
             return evaluate( args,
                              context.getNavigator() );
         }
 
         throw new FunctionCallException( "namespace-uri() requires zero or one argument." );
     }
 
     /**
      * Returns the namespace URI of <code>list.get(0)</code>
      * 
      * @param list a list of nodes
      * @param nav the <code>Navigator</code> used to retrieve the namespace
      * 
      * @return the namespace URI of <code>list.get(0)</code>
      * 
      * @throws FunctionCallException if <code>list.get(0)</code> is not a node
      */
     public static String evaluate(List list,
                                   Navigator nav) throws FunctionCallException
     {
         if ( ! list.isEmpty() )
         {
             Object first = list.get(0);
 
             if ( first instanceof List )
             {
                 return evaluate( (List) first,
                                  nav );
             }
             else if ( nav.isElement( first ) )
             {
                 return nav.getElementNamespaceUri( first );
             }
             else if ( nav.isAttribute( first ) )
             {
                 String uri = nav.getAttributeNamespaceUri( first );
                 if (uri == null) return "";
                 return uri;
             }
             else if ( nav.isProcessingInstruction( first ) )
             {
                 return "";
             }
             else if ( nav.isNamespace( first ) )
             {
                 return "";
             }
             else if ( nav.isDocument( first ) )
             {
                 return "";
             }
             else if ( nav.isComment( first ) )
             {
                 return "";
             }
             else if ( nav.isText( first ) )
             {
                 return "";
             }
             else {
                 throw new FunctionCallException(
                   "The argument to the namespace-uri function must be a node-set");   
             }
 
         }
 
         return "";
 
     }
 }
 

1		/*
2		* $Header: /home/projects/jaxen/scm/jaxen/src/java/main/org/jaxen/function/NamespaceUriFunction.java,v 1.13 2006/02/05 21:47:41 elharo Exp $
3		* $Revision: 1.13 $
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: NamespaceUriFunction.java,v 1.13 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>
60		* <b>4.1</b>
61		* <code><i>string</i> namespace-uri(<i>node-set?</i>)</code>
62		* </p>
63		*
64		* <blockquote src="http://www.w3.org/TR/xpath">
65		* <p>
66		* The <b>namespace-uri</b>
67		* function returns the namespace URI of the <a
68		* href="http://www.w3.org/TR/xpath#dt-expanded-name" target="_top">expanded-name</a> of the node in the
69		* argument node-set that is first in <a
70		* href="http://www.w3.org/TR/xpath#dt-document-order" target="_top">document order</a>. If the argument
71		* node-set is empty, the first node has no <a
72		* href="http://www.w3.org/TR/xpath#dt-expanded-name" target="_top">expanded-name</a>, or the namespace URI of
73		* the <a href="http://www.w3.org/TR/xpath#dt-expanded-name" target="_top">expanded-name</a> is null, an empty
74		* string is returned. If the argument is omitted, it defaults to a
75		* node-set with the context node as its only member.
76		* </p>
77		*
78		* <blockquote> <b>NOTE: </b>The string returned by the <b>namespace-uri</b> function will
79		* be empty except for element nodes and attribute nodes.</blockquote>
80		*
81		* </blockquote>
82		*
83		* @author bob mcwhirter (bob @ werken.com)
84		* @see <a href="http://www.w3.org/TR/xpath#function-namespace-uri"
85		* target="_top">Section 4.1 of the XPath Specification</a>
86		*/
87		public class NamespaceUriFunction implements Function
88		{
89
90		/**
91		* Create a new <code>NamespaceUriFunction</code> object.
92		*/
93	106	public NamespaceUriFunction() {}
94
95		/**
96		* Returns the namespace URI of the specified node or the namespace URI of the context node if
97		* no arguments are provided.
98		*
99		* @param context the context at the point in the
100		* expression where the function is called
101		* @param args a <code>List</code> containing zero or one items
102		*
103		* @return a <code>String</code> containing the namespace URI
104		*
105		* @throws FunctionCallException if <code>args</code> has more than one item
106		*/
107		public Object call(Context context,
108		List args) throws FunctionCallException
109		{
110	92	if (args.size() == 0)
111		{
112	74	return evaluate( context.getNodeSet(),
113		context.getNavigator() );
114		}
115
116	18	if ( args.size() == 1 )
117		{
118	16	return evaluate( args,
119		context.getNavigator() );
120		}
121
122	2	throw new FunctionCallException( "namespace-uri() requires zero or one argument." );
123		}
124
125		/**
126		* Returns the namespace URI of <code>list.get(0)</code>
127		*
128		* @param list a list of nodes
129		* @param nav the <code>Navigator</code> used to retrieve the namespace
130		*
131		* @return the namespace URI of <code>list.get(0)</code>
132		*
133		* @throws FunctionCallException if <code>list.get(0)</code> is not a node
134		*/
135		public static String evaluate(List list,
136		Navigator nav) throws FunctionCallException
137		{
138	104	if ( ! list.isEmpty() )
139		{
140	102	Object first = list.get(0);
141
142	102	if ( first instanceof List )
143		{
144	14	return evaluate( (List) first,
145		nav );
146		}
147	88	else if ( nav.isElement( first ) )
148		{
149	72	return nav.getElementNamespaceUri( first );
150		}
151	16	else if ( nav.isAttribute( first ) )
152		{
153	4	String uri = nav.getAttributeNamespaceUri( first );
154	4	if (uri == null) return "";
155	2	return uri;
156		}
157	12	else if ( nav.isProcessingInstruction( first ) )
158		{
159	2	return "";
160		}
161	10	else if ( nav.isNamespace( first ) )
162		{
163	2	return "";
164		}
165	8	else if ( nav.isDocument( first ) )
166		{
167	2	return "";
168		}
169	6	else if ( nav.isComment( first ) )
170		{
171	2	return "";
172		}
173	4	else if ( nav.isText( first ) )
174		{
175	2	return "";
176		}
177		else {
178	2	throw new FunctionCallException(
179		"The argument to the namespace-uri function must be a node-set");
180		}
181
182		}
183
184	2	return "";
185
186		}
187		}
188