/*
* $Id: XmlToObject.java 19250 2010-08-30 16:53:14Z dirk.olmes $
* --------------------------------------------------------------------------------------
* Copyright (c) MuleSoft, Inc. All rights reserved. http://www.mulesoft.com
*
* The software in this package is published under the terms of the CPAL v1.0
* license, a copy of which has been included with this distribution in the
* LICENSE.txt file.
*/
package org.mule.module.xml.transformer;
import org.mule.api.MuleMessage;
import org.mule.api.transformer.TransformerException;
import org.mule.transformer.types.DataTypeFactory;
import org.mule.util.store.DeserializationPostInitialisable;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;
import java.io.UnsupportedEncodingException;
/**
* <code>XmlToObject</code> converts xml created by the ObjectToXml transformer in to a
* java object graph. This transformer uses XStream. Xstream uses some clever tricks so
* objects that get marshalled to XML do not need to implement any interfaces including
* Serializable and you don't even need to specify a default constructor.
*
* @see ObjectToXml
*/
public class XmlToObject extends AbstractXStreamTransformer
{
private final DomDocumentToXml domTransformer = new DomDocumentToXml();
public XmlToObject()
{
registerSourceType(DataTypeFactory.STRING);
registerSourceType(DataTypeFactory.BYTE_ARRAY);
registerSourceType(DataTypeFactory.INPUT_STREAM);
registerSourceType(DataTypeFactory.create(org.w3c.dom.Document.class));
registerSourceType(DataTypeFactory.create(org.dom4j.Document.class));
setReturnDataType(DataTypeFactory.OBJECT);
}
@Override
public Object transformMessage(MuleMessage message, String outputEncoding) throws TransformerException
{
Object src = message.getPayload();
Object result;
if (src instanceof byte[])
{
try
{
Reader xml = new InputStreamReader(new ByteArrayInputStream((byte[]) src), outputEncoding);
result = getXStream().fromXML(xml);
}
catch (UnsupportedEncodingException e)
{
throw new TransformerException(this, e);
}
}
else if (src instanceof InputStream)
{
InputStream input = (InputStream) src;
try
{
Reader xml = new InputStreamReader(input, outputEncoding);
result = getXStream().fromXML(xml);
}
catch (Exception e)
{
throw new TransformerException(this, e);
}
finally
{
try
{
input.close();
}
catch (IOException e)
{
logger.warn("Exception closing stream: ", e);
}
}
}
else if (src instanceof String)
{
result = getXStream().fromXML(src.toString());
}
else
{
result = getXStream().fromXML((String) domTransformer.transform(src));
}
try
{
postDeserialisationInit(result);
return result;
}
catch (Exception e)
{
throw new TransformerException(this, e);
}
}
protected void postDeserialisationInit(final Object object) throws Exception
{
if (object instanceof DeserializationPostInitialisable)
{
DeserializationPostInitialisable.Implementation.init(object, muleContext);
}
}
}