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1   /*
2    * $Id: StringAppendTransformer.java 20321 2010-11-24 15:21:24Z dfeist $
3    * --------------------------------------------------------------------------------------
4    * Copyright (c) MuleSoft, Inc.  All rights reserved.  http://www.mulesoft.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.simple;
12  
13  import org.mule.api.transformer.TransformerException;
14  import org.mule.transformer.AbstractTransformer;
15  import org.mule.transformer.types.DataTypeFactory;
16  import org.mule.util.IOUtils;
17  import org.mule.util.StringUtils;
18  
19  import java.io.InputStream;
20  
21  public class StringAppendTransformer extends AbstractTransformer
22  {
23      private String message = StringUtils.EMPTY;
24  
25      public StringAppendTransformer()
26      {
27          this(StringUtils.EMPTY);
28      }
29  
30      public StringAppendTransformer(String message)
31      {
32          this.message = message;
33          registerSourceType(DataTypeFactory.STRING);
34          registerSourceType(DataTypeFactory.BYTE_ARRAY);
35          registerSourceType(DataTypeFactory.INPUT_STREAM);
36          setReturnDataType(DataTypeFactory.STRING);
37      }
38  
39      @Override
40      protected Object doTransform(Object src, String encoding) throws TransformerException
41      {
42          String string;
43          if (src instanceof byte[])
44          {
45              string = new String((byte[]) src);
46          }
47          else if (src instanceof InputStream)
48          {
49              InputStream input = (InputStream) src;
50              try
51              {
52                  string = IOUtils.toString(input);
53              }
54              finally
55              {
56                  IOUtils.closeQuietly(input);
57              }
58          }
59          else
60          {
61              string = (String) src;
62          }
63  
64          return append(message, string);
65      }
66  
67      public static String append(String append, String msg)
68      {
69          return msg + append;
70      }
71  
72      public String getMessage()
73      {
74          return message;
75      }
76  
77      public void setMessage(String message)
78      {
79          this.message = message;
80      }
81  }