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Java > Open Source Codes > org > jboss > console > plugins > helpers > servlet > ServletHelper


1 /*
2  * JBoss, Home of Professional Open Source
3  * Copyright 2005, JBoss Inc., and individual contributors as indicated
4  * by the @authors tag. See the copyright.txt in the distribution for a
5  * full listing of individual contributors.
6  *
7  * This is free software; you can redistribute it and/or modify it
8  * under the terms of the GNU Lesser General Public License as
9  * published by the Free Software Foundation; either version 2.1 of
10  * the License, or (at your option) any later version.
11  *
12  * This software is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with this software; if not, write to the Free
19  * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
20  * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
21  */
22 package org.jboss.console.plugins.helpers.servlet;
23
24 /**
25  * Helper class
26  *
27  * @author <a HREF="mailto:sacha.labourey@cogito-info.ch">Sacha Labourey</a>
28  * @author <a HREF="mailto:dimitris@jboss.org">Dimitris Andredis</a>
29  * @version $Revision: 40615 $
30  */
31 public class ServletHelper
32 {
33    /**
34     * Encode '<', '>', '"', '&' characters to their html equivalent
35     */
36    public static String JavaDoc filter(String JavaDoc input)
37    {
38       if (input == null)
39       {
40          return null;
41       }
42       else
43       {
44          StringBuffer JavaDoc filtered = new StringBuffer JavaDoc(input.length() * 2);
45          char c;
46          for (int i = 0; i < input.length(); i++)
47          {
48             c = input.charAt(i);
49             switch (c)
50             {
51                case '<':
52                   filtered.append("&lt;");
53                   break;
54                case '>':
55                   filtered.append("&gt;");
56                   break;
57                case '"':
58                   filtered.append("&quot;");
59                   break;
60                case '&':
61                   filtered.append("&amp;");
62                   break;
63                default:
64                   filtered.append(c);
65                   break;
66             }
67          }
68          return filtered.toString();
69       }
70    }
71 }
72
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