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Java > Open Source Codes > org > objectweb > cjdbc > common > sql > filters > Base64Filter


1 /**
2  * C-JDBC: Clustered JDBC.
3  * Copyright (C) 2002-2004 French National Institute For Research In Computer
4  * Science And Control (INRIA).
5  * Contact: c-jdbc@objectweb.org
6  *
7  * This library is free software; you can redistribute it and/or modify it
8  * under the terms of the GNU Lesser General Public License as published by the
9  * Free Software Foundation; either version 2.1 of the License, or any later
10  * version.
11  *
12  * This library is distributed in the hope that it will be useful, but WITHOUT
13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14  * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
15  * for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public License
18  * along with this library; if not, write to the Free Software Foundation,
19  * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
20  *
21  * Initial developer(s): Nicolas Modrzyk.
22  * Contributor(s): ______________________.
23  */
24
25 package org.objectweb.cjdbc.common.sql.filters;
26
27 import org.objectweb.cjdbc.common.stream.encoding.Base64;
28 import org.objectweb.cjdbc.common.stream.encoding.ZipEncoding;
29 import org.objectweb.cjdbc.common.xml.DatabasesXmlTags;
30
31 /**
32  * This class defines a Base64Filter. It is based on the Base64 encoding class
33  * from apache.
34  *
35  * @author <a HREF="mailto:Nicolas.Modrzyk@inria.fr">Nicolas Modrzyk </a>
36  * @version 1.0
37  */
38 public class Base64Filter extends AbstractBlobFilter
39 {
40
41   /**
42    * @see org.objectweb.cjdbc.common.sql.filters.AbstractBlobFilter#encode(byte[])
43    */
44   public String JavaDoc encode(byte[] data)
45   {
46     try
47     {
48       return Base64.encode(ZipEncoding.encode(data));
49     }
50     catch (Exception JavaDoc e)
51     {
52       e.printStackTrace();
53       return "";
54     }
55   }
56
57   /**
58    * @see org.objectweb.cjdbc.common.sql.filters.AbstractBlobFilter#encode(java.lang.String)
59    */
60   public String JavaDoc encode(String JavaDoc data)
61   {
62
63     return encode(data.getBytes());
64   }
65
66   /**
67    * @see org.objectweb.cjdbc.common.sql.filters.AbstractBlobFilter#decode(byte[])
68    */
69   public byte[] decode(byte[] data)
70   {
71     try
72     {
73       return ZipEncoding.decode(Base64.decode(new String JavaDoc(data)));
74     }
75     catch (Exception JavaDoc e)
76     {
77       e.printStackTrace();
78       return null;
79     }
80   }
81
82   /**
83    * @see org.objectweb.cjdbc.common.sql.filters.AbstractBlobFilter#decode(java.lang.String)
84    */
85   public byte[] decode(String JavaDoc data)
86   {
87     return decode(data.getBytes());
88   }
89
90   /**
91    * @see org.objectweb.cjdbc.common.sql.filters.AbstractBlobFilter#getXml()
92    */
93   public String JavaDoc getXml()
94   {
95     return DatabasesXmlTags.VAL_base64;
96   }
97
98 }
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