View Javadoc

1   /*
2    * $Id: TransformerConverter.java 7963 2007-08-21 08:53:15Z 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.config.converters;
12  
13  import org.mule.umo.transformer.UMOTransformer;
14  
15  import org.apache.commons.beanutils.ConversionException;
16  import org.apache.commons.beanutils.Converter;
17  
18  /**
19   * <code>TransformerConverter</code> will obtain a transformer name and convert it
20   * to a transformer instance by looking up the transformer from the
21   * <code>MuleManager</code>.
22   */
23  public class TransformerConverter implements Converter
24  {
25      /**
26       * Convert the specified input object into an output object of the specified
27       * type.
28       * 
29       * @param type Data type to which this value should be converted
30       * @param value The input value to be converted
31       * @throws ConversionException if conversion cannot be performed successfully
32       */
33      public Object convert(Class type, Object value)
34      {
35          if (value == null)
36          {
37              throw new ConversionException("No value specified");
38          }
39          if (value instanceof UMOTransformer)
40          {
41              return value;
42          }
43          return null;
44      }
45  }