StringUtil


1   /*
2    * Cobertura - http://cobertura.sourceforge.net/
3    *
4    * Copyright (C) 2005 Jeremy Thomerson
5    *
6    * Note: This file is dual licensed under the GPL and the Apache
7    * Source License (so that it can be used from both the main
8    * Cobertura classes and the ant tasks).
9    *
10   * Cobertura is free software; you can redistribute it and/or modify
11   * it under the terms of the GNU General Public License as published
12   * by the Free Software Foundation; either version 2 of the License,
13   * or (at your option) any later version.
14   *
15   * Cobertura is distributed in the hope that it will be useful, but
16   * WITHOUT ANY WARRANTY; without even the implied warranty of
17   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18   * General Public License for more details.
19   *
20   * You should have received a copy of the GNU General Public License
21   * along with Cobertura; if not, write to the Free Software
22   * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
23   * USA
24   */
25  
26  package net.sourceforge.cobertura.util;
27  
28  /**
29   * Abstract, not to be instantiated utility class for String functions.
30   * 
31   * @author Jeremy Thomerson
32   */
33  public abstract class StringUtil
34  {
35  
36      /**
37       * <p>
38       * Replaces all instances of "replace" with "with" from the "original"
39       * string.
40       * </p>
41       *
42       * <p>
43       * NOTE: it is known that a similar function is included in jdk 1.4 as replaceAll(),
44       * but is written here so as to allow backward compatibility to users using SDK's
45       * prior to 1.4
46       * </p>
47       * 
48       * @param original The original string to do replacement on.
49       * @param replace The string to replace.
50       * @param with The string to replace "replace" with.
51       * @return The replaced string.
52       */
53      public static String   replaceAll(String   original, String   replace, String   with)
54      {
55          if (original == null)
56          {
57              return original;
58          }
59  
60          final int len = replace.length();
61          StringBuffer   sb = new StringBuffer  (original.length());
62          int start = 0;
63          int found = -1;
64  
65          while ((found = original.indexOf(replace, start)) != -1)
66          {
67              sb.append(original.substring(start, found));
68              sb.append(with);
69              start = found + len;
70          }
71  
72          sb.append(original.substring(start));
73          return sb.toString();
74      }
75  
76  }
77
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