Coverage Report

Coverage Report - org.jaxen.function.CountFunction

Classes in this File

Line Coverage

Branch Coverage

Complexity

CountFunction

100%

7/7

100%

2/2

 /*
  * $Header: /home/projects/jaxen/scm/jaxen/src/java/main/org/jaxen/function/CountFunction.java,v 1.14 2006/02/05 21:47:41 elharo Exp $
  * $Revision: 1.14 $
  * $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: CountFunction.java,v 1.14 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;
 
 /**
  *  <p><b>4.1</b> <code><i>number</i> count(<i>node-set</i>)</code></p> 
  *  
  * <blockquote src="http://www.w3.org/TR/xpath#function-count">
  * The <b>count</b> function returns the number of nodes in the argument node-set.
  * </blockquote>
  * @author bob mcwhirter (bob @ werken.com)
  * @see <a href="http://www.w3.org/TR/xpath#function-count">Section 4.1 of the XPath Specification</a>
  */
 public class CountFunction implements Function
 {
 
     /**
      * Create a new <code>CountFunction</code> object.
      */
     public CountFunction() {}
     
     /**
      * <p>
      * Returns the number of nodes in the specified node-set.
      * </p>
      * @param context ignored
      * @param args the function arguments
      * 
      * @return a <code>Double</code> giving the integral number of items in the first argument
      * 
      * @throws FunctionCallException if args does not have exactly one 
      *     item; or that item is not a <code>List</code>
      */
     public Object call(Context context,
                        List args) throws FunctionCallException
     {
         if (args.size() == 1)
         {
             return evaluate( args.get(0) );
         }
 
         throw new FunctionCallException( "count() requires one argument." );
     }
 
     /**
      * <p>
      * Returns the number of nodes in the specified node-set.
      * </p>
      * 
      * @param obj a <code>List</code> of nodes
      * @return the integral number of items in the list
      * @throws FunctionCallException if obj is not a <code>List</code>
      */
     public static Double evaluate(Object obj) throws FunctionCallException
     {
       
         if (obj instanceof List)
         {
             return new Double( ((List) obj).size() );
         }
       
         throw new FunctionCallException("count() function can only be used for node-sets");
         
     }
     
 }

1		/*
2		* $Header: /home/projects/jaxen/scm/jaxen/src/java/main/org/jaxen/function/CountFunction.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: CountFunction.java,v 1.14 2006/02/05 21:47:41 elharo Exp $
46		*/
47
48		package org.jaxen.function;
49
50		import java.util.List;
51
52		import org.jaxen.Context;
53		import org.jaxen.Function;
54		import org.jaxen.FunctionCallException;
55
56		/**
57		* <p><b>4.1</b> <code><i>number</i> count(<i>node-set</i>)</code></p>
58		*
59		* <blockquote src="http://www.w3.org/TR/xpath#function-count">
60		* The <b>count</b> function returns the number of nodes in the argument node-set.
61		* </blockquote>
62		* @author bob mcwhirter (bob @ werken.com)
63		* @see <a href="http://www.w3.org/TR/xpath#function-count">Section 4.1 of the XPath Specification</a>
64		*/
65		public class CountFunction implements Function
66		{
67
68		/**
69		* Create a new <code>CountFunction</code> object.
70		*/
71	106	public CountFunction() {}
72
73		/**
74		* <p>
75		* Returns the number of nodes in the specified node-set.
76		* </p>
77		* @param context ignored
78		* @param args the function arguments
79		*
80		* @return a <code>Double</code> giving the integral number of items in the first argument
81		*
82		* @throws FunctionCallException if args does not have exactly one
83		* item; or that item is not a <code>List</code>
84		*/
85		public Object call(Context context,
86		List args) throws FunctionCallException
87		{
88	536	if (args.size() == 1)
89		{
90	532	return evaluate( args.get(0) );
91		}
92
93	4	throw new FunctionCallException( "count() requires one argument." );
94		}
95
96		/**
97		* <p>
98		* Returns the number of nodes in the specified node-set.
99		* </p>
100		*
101		* @param obj a <code>List</code> of nodes
102		* @return the integral number of items in the list
103		* @throws FunctionCallException if obj is not a <code>List</code>
104		*/
105		public static Double evaluate(Object obj) throws FunctionCallException
106		{
107
108	532	if (obj instanceof List)
109		{
110	530	return new Double( ((List) obj).size() );
111		}
112
113	2	throw new FunctionCallException("count() function can only be used for node-sets");
114
115		}
116
117		}