Coverage Report - org.jaxen.function.ConcatFunction
 
Classes in this File Line Coverage Branch Coverage Complexity
ConcatFunction
100%
10/10
100%
2/2
2.333
 
 1  
 /*
 2  
  * $Header: /home/projects/jaxen/scm/jaxen/src/java/main/org/jaxen/function/ConcatFunction.java,v 1.9 2006/02/05 21:47:41 elharo Exp $
 3  
  * $Revision: 1.9 $
 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: ConcatFunction.java,v 1.9 2006/02/05 21:47:41 elharo Exp $
 46  
  */
 47  
 
 48  
 
 49  
 package org.jaxen.function;
 50  
 
 51  
 import java.util.Iterator;
 52  
 import java.util.List;
 53  
 
 54  
 import org.jaxen.Context;
 55  
 import org.jaxen.Function;
 56  
 import org.jaxen.FunctionCallException;
 57  
 import org.jaxen.Navigator;
 58  
 
 59  
 /**
 60  
  * <b>4.2</b> <code><i>string</i> concat(<i>string</i>,<i>string</i>,<i>string*</i>)</code> 
 61  
  * <p>
 62  
  * Concatenates its arguments and returns the resulting string.
 63  
  * </p>
 64  
  *  
 65  
  *  @author bob mcwhirter (bob@werken.com)
 66  
  * 
 67  
  * @see <a href="http://www.w3.org/TR/xpath#function-concat">Section 4.2 of the XPath Specification</a>
 68  
  */
 69  
 public class ConcatFunction implements Function
 70  
 {
 71  
 
 72  
     /**
 73  
      * Create a new <code>ConcatFunction</code> object.
 74  
      */
 75  106
     public ConcatFunction() {}
 76  
     
 77  
     /** 
 78  
      * Concatenates the arguments and returns the resulting string.
 79  
      * Non-string items are first converted to strings as if by the 
 80  
      * XPath <code>string()<code> function.
 81  
      *
 82  
      * @param context the context at the point in the
 83  
      *         expression when the function is called
 84  
      * @param args the list of strings to be concatenated
 85  
      * 
 86  
      * @return a <code>String</code> containing the concatenation of the items 
 87  
      *     of <code>args</code>
 88  
      * 
 89  
      * @throws FunctionCallException if <code>args</code> has less than two items
 90  
      */
 91  
     public Object call(Context context,
 92  
                        List args) throws FunctionCallException
 93  
     {
 94  58
         if ( args.size() >= 2 )
 95  
         {
 96  56
             return evaluate( args,
 97  
                              context.getNavigator() );
 98  
         }
 99  
 
 100  2
         throw new FunctionCallException("concat() requires at least two arguments");
 101  
     }
 102  
 
 103  
     /** 
 104  
      * Converts each item in the list to a string and returns the 
 105  
      * concatenation of these strings.
 106  
      * If necessary, each item is first converted to a <code>String</code>
 107  
      * as if by the XPath <code>string()</code> function.
 108  
      * 
 109  
      * @param list the items to be concatenated
 110  
      * @param nav ignored
 111  
      * 
 112  
      * @return the concatenation of the arguments
 113  
      */
 114  
    public static String evaluate(List list,
 115  
                                   Navigator nav)
 116  
     {
 117  56
         StringBuffer result = new StringBuffer();
 118  56
         Iterator argIter = list.iterator();
 119  184
         while ( argIter.hasNext() )
 120  
         {
 121  128
             result.append( StringFunction.evaluate( argIter.next(),
 122  
                                                     nav ) );
 123  128
         }
 124  
     
 125  56
         return result.toString();
 126  
     }
 127  
 }