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1   /*
2    * $Id: FileToString.java 7976 2007-08-21 14:26:13Z 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.providers.file.transformers;
12  
13  import org.mule.umo.transformer.TransformerException;
14  
15  import java.io.File;
16  import java.io.UnsupportedEncodingException;
17  
18  /**
19   * <code>FileToString</code> reads file contents into a string.
20   */
21  public class FileToString extends FileToByteArray
22  {
23  
24      public FileToString()
25      {
26          registerSourceType(File.class);
27          registerSourceType(byte[].class);
28          setReturnClass(String.class);
29      }
30  
31      /**
32       * Simple implementation which relies on {@link FileToByteArray} to get a
33       * <code>byte[]</code> from the file beeing parsed and then transform it to a
34       * String with the correct encoding. If the encoding isn't supported simply throw
35       * an exception, good tranformation or no transformation at all. NOTE: if a
36       * <code>byte[]</code> is passed in as a source object this transformer accepts
37       * it and tries the usual transformation.
38       */
39      // @Override
40      public Object doTransform(Object src, String encoding) throws TransformerException
41      {
42          byte[] bytes;
43  
44          if (src instanceof byte[])
45          {
46              bytes = (byte[])src;
47          }
48          else
49          {
50              bytes = (byte[])super.doTransform(src, encoding);
51          }
52  
53          try
54          {
55              return new String(bytes, encoding);
56          }
57          catch (UnsupportedEncodingException uee)
58          {
59              throw new TransformerException(this, uee);
60          }
61      }
62  
63  }