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Java > Open Source Codes > net > mlw > vlh > adapter > util > TokenReplaceTextManipulator


1 /**
2  * Copyright (c) 2003 held jointly by the individual authors.
3  *
4  * This library is free software; you can redistribute it and/or modify it
5  * under the terms of the GNU Lesser General Public License as published
6  * by the Free Software Foundation; either version 2.1 of the License, or
7  * (at your option) any later version.
8  *
9  * This library is distributed in the hope that it will be useful, but
10  * WITHOUT ANY WARRANTY; with out even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12  * GNU Lesser General Public License for more details.
13  *
14  * You should have received a copy of the GNU Lesser General Public License
15  * along with this library; if not, write to the Free Software Foundation,
16  * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
17  *
18  * > http://www.gnu.org/copyleft/lesser.html
19  * > http://www.opensource.org/licenses/lgpl-license.php
20  */
21 package net.mlw.vlh.adapter.util;
22
23 import java.util.Collections JavaDoc;
24 import java.util.Map JavaDoc;
25
26 /** Replaces "This is a [test]" with "This is a <%=map.get("test")%>"
27  *
28  * @author mwilson
29  */
30 public class TokenReplaceTextManipulator implements TextManipulator
31 {
32     private String JavaDoc startToken = "[";
33     private String JavaDoc endToken = "]";
34     private String JavaDoc nullValue = "";
35
36     /**
37      * @see net.mlw.vlh.adapter.util.TextManipulator#manipulate(java.lang.String, java.lang.Object)
38      */
39     public StringBuffer JavaDoc manipulate(StringBuffer JavaDoc text, Map JavaDoc model)
40     {
41         if (model == null)
42         {
43             model = Collections.EMPTY_MAP;
44         }
45
46         //Replace any [key] with the value in the whereClause Map.
47 for (int i = 0, end = 0, start; ((start = text.toString().indexOf(startToken, end)) >= 0); i++)
48         {
49             end = text.toString().indexOf(endToken, start);
50             String JavaDoc key = text.substring(start + 1, end);
51
52             Object JavaDoc modelValue = model.get(key);
53             text.replace(start, end + 1, (modelValue == null) ? nullValue : modelValue.toString());
54             end -= (key.length() + 2);
55         }
56
57         return text;
58     }
59
60     /**
61      * @param endToken The endToken to set.
62      */
63     public void setEndToken(String JavaDoc endToken)
64     {
65         this.endToken = endToken;
66     }
67
68     /**
69      * @param startToken The startToken to set.
70      */
71     public void setStartToken(String JavaDoc startToken)
72     {
73         this.startToken = startToken;
74     }
75     
76     /**
77      * @param nullValue The nullValue to set.
78      */
79     public void setNullValue(String JavaDoc nullValue)
80     {
81         this.nullValue = nullValue;
82     }
83 }
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