Coverage Report - org.jaxen.function.SubstringAfterFunction
 
Classes in this File Line Coverage Branch Coverage Complexity
SubstringAfterFunction
100%
10/10
100%
2/2
2.667
 
 1  
 /*
 2  
  * $Header: /home/projects/jaxen/scm/jaxen/src/java/main/org/jaxen/function/SubstringAfterFunction.java,v 1.11 2006/02/05 21:47:41 elharo Exp $
 3  
  * $Revision: 1.11 $
 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: SubstringAfterFunction.java,v 1.11 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><b>4.2</b> <code><i>string</i> substring-after(<i>string</i>,<i>string</i>)</code></p> 
 60  
  * 
 61  
  * 
 62  
  * <blockquote src="http://www.w3.org/TR/xpath">
 63  
  * The <b>substring-after</b> function returns the substring of the first argument string 
 64  
  * that follows the first occurrence of the second argument string in the first 
 65  
  * argument string, or the empty string if the first argument string does not contain the second argument string. 
 66  
  * For example, substring-after("1999/04/01","/") returns 04/01, 
 67  
  * and substring-after("1999/04/01","19") returns 99/04/01.
 68  
  * </blockquote>
 69  
  * 
 70  
  * @author bob mcwhirter (bob @ werken.com)
 71  
  * @see <a href="http://www.w3.org/TR/xpath#function-substring-after" target="_top">Section 4.2 of the XPath Specification</a>
 72  
  */
 73  
 public class SubstringAfterFunction implements Function
 74  
 {
 75  
 
 76  
     /**
 77  
      * Create a new <code>SubstringAfterFunction</code> object.
 78  
      */
 79  106
     public SubstringAfterFunction() {}
 80  
 
 81  
 
 82  
     /** 
 83  
      * Returns the part of the string-value of the first item in <code>args</code>
 84  
      * that follows the string-value of the second item in <code>args</code>;
 85  
      * or the empty string if the second string is not a substring of the first string.
 86  
      *
 87  
      * @param context the context at the point in the
 88  
      *         expression when the function is called
 89  
      * @param args a list that contains two items
 90  
      * 
 91  
      * @return a <code>String</code> containing that 
 92  
      *     part of the string-value of the first item in <code>args</code>
 93  
      *     that comes before the string-value of the second item in <code>args</code>
 94  
      * 
 95  
      * @throws FunctionCallException if <code>args</code> does not have length two
 96  
      */
 97  
     public Object call(Context context,
 98  
                        List args) throws FunctionCallException
 99  
     {
 100  24
         if (args.size() == 2)
 101  
         {
 102  18
             return evaluate( args.get(0),
 103  
                              args.get(1),
 104  
                              context.getNavigator() );
 105  
         }
 106  
 
 107  6
         throw new FunctionCallException( "substring-after() requires two arguments." );
 108  
     }
 109  
 
 110  
 
 111  
     /** 
 112  
      * Returns the part of <code>strArg</code> that follows the first occurence 
 113  
      * of <code>matchArg</code>; or the empty string if the 
 114  
      * <code>strArg</code> does not contain <code>matchArg</code>
 115  
      * 
 116  
      * @param strArg the string from which the substring is extracted
 117  
      * @param matchArg the string that marks the boundary of the substring
 118  
      * @param nav the <code>Navigator</code> used to calculate the string-values of
 119  
      *     the first two arguments
 120  
      * 
 121  
      * @return a <code>String</code> containing
 122  
      *     the part of <code>strArg</code> that precedes the first occurence 
 123  
      *     of <code>matchArg</code>
 124  
      * 
 125  
      */
 126  
     public static String evaluate(Object strArg,
 127  
                                   Object matchArg,
 128  
                                   Navigator nav)
 129  
     {
 130  18
         String str   = StringFunction.evaluate( strArg,
 131  
                                                 nav );
 132  
 
 133  18
         String match = StringFunction.evaluate( matchArg,
 134  
                                                 nav );
 135  
     
 136  18
         int loc = str.indexOf(match);
 137  
 
 138  18
         if ( loc < 0 )
 139  
         {
 140  6
             return "";
 141  
         }
 142  
 
 143  12
         return str.substring(loc+match.length());
 144  
     }
 145  
 }