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1   /*
2    * $Id: XmlToXMLStreamReader.java 19250 2010-08-30 16:53:14Z dirk.olmes $
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.module.xml.transformer;
12  
13  import org.mule.api.MuleMessage;
14  import org.mule.api.transformer.DiscoverableTransformer;
15  import org.mule.api.transformer.TransformerException;
16  import org.mule.config.i18n.MessageFactory;
17  import org.mule.module.xml.stax.ReversibleXMLStreamReader;
18  import org.mule.module.xml.util.XMLUtils;
19  import org.mule.transformer.types.DataTypeFactory;
20  
21  import javax.xml.stream.XMLStreamException;
22  import javax.xml.stream.XMLStreamReader;
23  import javax.xml.transform.Source;
24  
25  import org.w3c.dom.Document;
26  
27  public class XmlToXMLStreamReader extends AbstractXmlTransformer implements DiscoverableTransformer
28  {
29  
30      private int priorityWeighting = DiscoverableTransformer.DEFAULT_PRIORITY_WEIGHTING;
31      private boolean reversible;
32      
33      public XmlToXMLStreamReader()
34      {
35          super();
36          registerSourceType(DataTypeFactory.create(Source.class));
37          registerSourceType(DataTypeFactory.INPUT_STREAM);
38          registerSourceType(DataTypeFactory.create(Document.class));
39          registerSourceType(DataTypeFactory.BYTE_ARRAY);
40          registerSourceType(DataTypeFactory.STRING);
41  
42          setReturnDataType(DataTypeFactory.create(XMLStreamReader.class));
43      }
44  
45      @Override
46      public Object transformMessage(MuleMessage message, String encoding) throws TransformerException
47      {
48          Object src = message.getPayload();
49          try
50          {
51              XMLStreamReader xsr = XMLUtils.toXMLStreamReader(getXMLInputFactory(), src);
52              if (xsr == null)
53              {
54                  throw new TransformerException(MessageFactory
55                      .createStaticMessage("Unable to convert " + src.getClass() + " to XMLStreamReader."), this);
56              }
57          
58              if (reversible && !(xsr instanceof ReversibleXMLStreamReader))
59              {
60                  return new ReversibleXMLStreamReader(xsr);
61              }
62              else
63              {
64                  return xsr;
65              }
66          }
67          catch (XMLStreamException e)
68          {
69              throw new TransformerException(this, e);
70          }
71      }
72  
73      public boolean isReversible()
74      {
75          return reversible;
76      }
77  
78      public void setReversible(boolean reversible)
79      {
80          this.reversible = reversible;
81      }
82  
83      public int getPriorityWeighting()
84      {
85          return priorityWeighting;
86      }
87  
88      public void setPriorityWeighting(int priorityWeighting)
89      {
90          this.priorityWeighting = priorityWeighting;
91      }
92  }