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1   /*
2    * $Id: Base64Encoder.java 11336 2008-03-12 17:53:18Z dirk.olmes $
3    * --------------------------------------------------------------------------------------
4    * Copyright (c) MuleSource, Inc.  All rights reserved.  http://www.mulesource.com
5    *
6    * The software in this package is published under the terms of the CPAL v1.0
7    * license, a copy of which has been included with this distribution in the
8    * LICENSE.txt file.
9    */
10  
11  package org.mule.transformer.codec;
12  
13  import org.mule.api.transformer.TransformerException;
14  import org.mule.config.i18n.CoreMessages;
15  import org.mule.transformer.AbstractTransformer;
16  import org.mule.util.Base64;
17  import org.mule.util.IOUtils;
18  
19  import java.io.InputStream;
20  
21  /**
22   * <code>Base64Encoder</code> transforms strings or byte arrays into Base64 encoded
23   * string.
24   */
25  public class Base64Encoder extends AbstractTransformer
26  {
27  
28      public Base64Encoder()
29      {
30          registerSourceType(String.class);
31          registerSourceType(byte[].class);
32          registerSourceType(InputStream.class);
33          setReturnClass(String.class);
34      }
35  
36      public Object doTransform(Object src, String encoding) throws TransformerException
37      {
38          try
39          {
40              byte[] buf;
41  
42              if (src instanceof String)
43              {
44                  buf = ((String) src).getBytes(encoding);
45              }
46              else if (src instanceof InputStream)
47              {
48                  InputStream input = (InputStream) src;
49                  try
50                  {
51                      buf = IOUtils.toByteArray(input);
52                  }
53                  finally
54                  {
55                      input.close();
56                  }
57              }
58              else
59              {
60                  buf = (byte[]) src;
61              }
62  
63              String result = Base64.encodeBytes(buf, Base64.DONT_BREAK_LINES);
64  
65              if (getReturnClass().equals(byte[].class))
66              {
67                  return result.getBytes(encoding);
68              }
69              else
70              {
71                  return result;
72              }
73          }
74          catch (Exception ex)
75          {
76              throw new TransformerException(
77                  CoreMessages.transformFailed(src.getClass().getName(), "base64"), this, ex);
78          }
79      }
80  
81  }