/*
* $Id: JAXBUnmarshallerTransformer.java 21889 2011-05-12 03:30:26Z 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.jaxb;
import org.mule.api.lifecycle.InitialisationException;
import org.mule.api.transformer.DataType;
import org.mule.api.transformer.TransformerException;
import org.mule.config.i18n.CoreMessages;
import org.mule.transformer.AbstractTransformer;
import org.mule.transformer.types.DataTypeFactory;
import java.io.File;
import java.io.InputStream;
import java.io.StringReader;
import java.io.Writer;
import java.net.URL;
import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBElement;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Unmarshaller;
import javax.xml.stream.XMLEventReader;
import javax.xml.stream.XMLStreamReader;
import javax.xml.transform.Source;
import org.w3c.dom.Node;
/**
* Allows un-marshaling of XML generated by JAXB to a Java object graph. By default
* the returnType for this transformer is {@link Object}. If a specific returnType is
* set and no external {@link javax.xml.bind.JAXBContext} is set on the transformer,
* then a {@link javax.xml.bind.JAXBContext} will be created using the returnType.
*
* @since 3.0
*/
public class JAXBUnmarshallerTransformer extends AbstractTransformer
{
protected JAXBContext jaxbContext;
public JAXBUnmarshallerTransformer()
{
registerSourceType(DataTypeFactory.STRING);
registerSourceType(DataTypeFactory.create(Writer.class));
registerSourceType(DataTypeFactory.create(File.class));
registerSourceType(DataTypeFactory.create(URL.class));
registerSourceType(DataTypeFactory.create(Node.class));
registerSourceType(DataTypeFactory.INPUT_STREAM);
registerSourceType(DataTypeFactory.create(Source.class));
registerSourceType(DataTypeFactory.create(XMLStreamReader.class));
registerSourceType(DataTypeFactory.create(XMLEventReader.class));
}
public JAXBUnmarshallerTransformer(JAXBContext jaxbContext, DataType<?> returnType)
{
this();
this.jaxbContext = jaxbContext;
setReturnDataType(returnType);
}
@Override
public void initialise() throws InitialisationException
{
super.initialise();
if (jaxbContext == null)
{
if(Object.class.equals(getReturnDataType().getType()))
{
throw new InitialisationException(CoreMessages.objectIsNull("jaxbContext"), this);
}
else
{
try
{
jaxbContext = JAXBContext.newInstance(getReturnDataType().getType());
}
catch (JAXBException e)
{
throw new InitialisationException(e, this);
}
}
}
}
@Override
protected Object doTransform(Object src, String outputEncoding) throws TransformerException
{
try
{
final Unmarshaller u = jaxbContext.createUnmarshaller();
if (src instanceof String)
{
return u.unmarshal(new StringReader((String) src));
}
else if (src instanceof File)
{
return u.unmarshal((File) src);
}
else if (src instanceof URL)
{
return u.unmarshal((URL) src);
}
else if (src instanceof InputStream)
{
return u.unmarshal((InputStream) src);
}
else if (src instanceof Node)
{
JAXBElement<?> e = u.unmarshal((Node) src, getReturnDataType().getType());
return e.getValue();
}
else if (src instanceof Source)
{
JAXBElement<?> e = u.unmarshal((Source) src, getReturnDataType().getType());
return e.getValue();
}
else if (src instanceof XMLStreamReader)
{
JAXBElement<?> e = u.unmarshal((XMLStreamReader) src, getReturnDataType().getType());
return e.getValue();
}
else if (src instanceof XMLEventReader)
{
JAXBElement<?> e = u.unmarshal((XMLEventReader) src, getReturnDataType().getType());
return e.getValue();
}
}
catch (Exception e)
{
throw new TransformerException(this, e);
}
return null;
}
public JAXBContext getJaxbContext()
{
return jaxbContext;
}
public void setJaxbContext(JAXBContext jaxbContext)
{
this.jaxbContext = jaxbContext;
}
}