Coverage Report

Coverage Report - org.jaxen.function.NormalizeSpaceFunction

Classes in this File

Line Coverage

Branch Coverage

Complexity

NormalizeSpaceFunction

100%

25/25

100%

7/7

3.25

 /*
  * $Header: /home/projects/jaxen/scm/jaxen/src/java/main/org/jaxen/function/NormalizeSpaceFunction.java,v 1.17 2006/02/05 21:47:41 elharo Exp $
  * $Revision: 1.17 $
  * $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: NormalizeSpaceFunction.java,v 1.17 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>4.2</b> <code><i>string</i> normalize-space(<i>string</i>)</code>
  * </p>
  * 
  * <blockquote src="http://www.w3.org/TR/xpath#function-normalize-space"> 
  * The <b>normalize-space</b> function
  * returns the argument string with whitespace normalized by stripping
  * leading and trailing whitespace and replacing sequences of whitespace
  * characters by a single space. Whitespace characters are the same as
  * those allowed by the <a href="http://www.w3.org/TR/REC-xml#NT-S" target="_top">S</a>
  * production in XML. If the argument is omitted, it defaults to the
  * context node converted to a string, in other words the <a
  * href="http://www.w3.org/TR/xpath#dt-string-value"  
  * target="_top">string-value</a> of the context node.
  * </blockquote>
  * 
  * @author James Strachan (james@metastuff.com)
  * @see <a href="http://www.w3.org/TR/xpath#function-normalize-space"
  *      target="_top">Section 4.2 of the XPath Specification</a>
  */
 public class NormalizeSpaceFunction implements Function
 {
 
 
     /**
      * Create a new <code>NormalizeSpaceFunction</code> object.
      */
     public NormalizeSpaceFunction() {}
     
     /** 
      * Returns the string-value of the first item in <code>args</code>
      * after removing all leading and trailing white space, and 
      * replacing each other sequence of whitespace by a single space.
      * Whitespace consists of the characters space (0x32), carriage return (0x0D),
      * linefeed (0x0A), and tab (0x09).
      *
      * @param context the context at the point in the
      *         expression when the function is called
      * @param args a list that contains exactly one item
      * 
      * @return a normalized <code>String</code>
      * 
      * @throws FunctionCallException if <code>args</code> does not have length one
      */
     public Object call(Context context,
                        List args) throws FunctionCallException
     {
         
         if (args.size() == 0) {
             return evaluate( context.getNodeSet(),
                              context.getNavigator() );
         }
         else if (args.size() == 1)
         {
             return evaluate( args.get(0),
                              context.getNavigator() );
         }
     
         throw new FunctionCallException( "normalize-space() cannot have more than one argument" );
     }
 
     /** 
      * Returns the string-value of <code>strArg</code> after removing
      * all leading and trailing white space, and 
      * replacing each other sequence of whitespace by a single space.
      * Whitespace consists of the characters space (0x32), carriage return (0x0D),
      * linefeed (0x0A), and tab (0x09).
      *
      * @param strArg the object whose string-value is normalized
      * @param nav the context at the point in the
      *         expression when the function is called
      * 
      * @return the normalized string-value
      */
     public static String evaluate(Object strArg,
                                   Navigator nav) 
     {
         String str = StringFunction.evaluate( strArg,
                                               nav );
 
         char[] buffer = str.toCharArray();
         int write = 0;
         int lastWrite = 0;
         boolean wroteOne = false;
         int read = 0;
         while (read < buffer.length)
         {
             if (isXMLSpace(buffer[read]))
             {
                 if (wroteOne)
                 {
                     buffer[write++] = ' ';
                 }
                 do
                 {
                     read++;
                 }
                 while(read < buffer.length && isXMLSpace(buffer[read]));
             }
             else
             {
                 buffer[write++] = buffer[read++];
                 wroteOne = true;
                 lastWrite = write;
             }
         }
 
         return new String(buffer, 0, lastWrite);
     }
     
     
     private static boolean isXMLSpace(char c) {
         return c == ' ' || c == '\n' || c == '\r' || c == '\t';
     }
     
 }

1		/*
2		* $Header: /home/projects/jaxen/scm/jaxen/src/java/main/org/jaxen/function/NormalizeSpaceFunction.java,v 1.17 2006/02/05 21:47:41 elharo Exp $
3		* $Revision: 1.17 $
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: NormalizeSpaceFunction.java,v 1.17 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>4.2</b> <code><i>string</i> normalize-space(<i>string</i>)</code>
61		* </p>
62		*
63		* <blockquote src="http://www.w3.org/TR/xpath#function-normalize-space">
64		* The <b>normalize-space</b> function
65		* returns the argument string with whitespace normalized by stripping
66		* leading and trailing whitespace and replacing sequences of whitespace
67		* characters by a single space. Whitespace characters are the same as
68		* those allowed by the <a href="http://www.w3.org/TR/REC-xml#NT-S" target="_top">S</a>
69		* production in XML. If the argument is omitted, it defaults to the
70		* context node converted to a string, in other words the <a
71		* href="http://www.w3.org/TR/xpath#dt-string-value"
72		* target="_top">string-value</a> of the context node.
73		* </blockquote>
74		*
75		* @author James Strachan (james@metastuff.com)
76		* @see <a href="http://www.w3.org/TR/xpath#function-normalize-space"
77		* target="_top">Section 4.2 of the XPath Specification</a>
78		*/
79		public class NormalizeSpaceFunction implements Function
80		{
81
82
83		/**
84		* Create a new <code>NormalizeSpaceFunction</code> object.
85		*/
86	106	public NormalizeSpaceFunction() {}
87
88		/**
89		* Returns the string-value of the first item in <code>args</code>
90		* after removing all leading and trailing white space, and
91		* replacing each other sequence of whitespace by a single space.
92		* Whitespace consists of the characters space (0x32), carriage return (0x0D),
93		* linefeed (0x0A), and tab (0x09).
94		*
95		* @param context the context at the point in the
96		* expression when the function is called
97		* @param args a list that contains exactly one item
98		*
99		* @return a normalized <code>String</code>
100		*
101		* @throws FunctionCallException if <code>args</code> does not have length one
102		*/
103		public Object call(Context context,
104		List args) throws FunctionCallException
105		{
106
107	56	if (args.size() == 0) {
108	2	return evaluate( context.getNodeSet(),
109		context.getNavigator() );
110		}
111	54	else if (args.size() == 1)
112		{
113	52	return evaluate( args.get(0),
114		context.getNavigator() );
115		}
116
117	2	throw new FunctionCallException( "normalize-space() cannot have more than one argument" );
118		}
119
120		/**
121		* Returns the string-value of <code>strArg</code> after removing
122		* all leading and trailing white space, and
123		* replacing each other sequence of whitespace by a single space.
124		* Whitespace consists of the characters space (0x32), carriage return (0x0D),
125		* linefeed (0x0A), and tab (0x09).
126		*
127		* @param strArg the object whose string-value is normalized
128		* @param nav the context at the point in the
129		* expression when the function is called
130		*
131		* @return the normalized string-value
132		*/
133		public static String evaluate(Object strArg,
134		Navigator nav)
135		{
136	54	String str = StringFunction.evaluate( strArg,
137		nav );
138
139	54	char[] buffer = str.toCharArray();
140	54	int write = 0;
141	54	int lastWrite = 0;
142	54	boolean wroteOne = false;
143	54	int read = 0;
144	262	while (read < buffer.length)
145		{
146	208	if (isXMLSpace(buffer[read]))
147		{
148	100	if (wroteOne)
149		{
150	58	buffer[write++] = ' ';
151		}
152		do
153		{
154	244	read++;
155		}
156	244	while(read < buffer.length && isXMLSpace(buffer[read]));
157	66	}
158		else
159		{
160	108	buffer[write++] = buffer[read++];
161	108	wroteOne = true;
162	108	lastWrite = write;
163		}
164	108	}
165
166	54	return new String(buffer, 0, lastWrite);
167		}
168
169
170		private static boolean isXMLSpace(char c) {
171	418	return c == ' ' \|\| c == '\n' \|\| c == '\r' \|\| c == '\t';
172		}
173
174		}