public <T> T fromXML( final InputStream in, final Unmarshaller.Listener listener ) {
	try {
		final JAXBContext jc = createJAXBContext( additionalClazzes );
		final Unmarshaller unmarshaller = jc.createUnmarshaller();
		unmarshaller.setEventHandler( new DefaultValidationEventHandler() );
		unmarshaller.setListener( listener );

		@SuppressWarnings( "unchecked" )
		final T result = (T) unmarshaller.unmarshal( in );
		return result;

	} catch ( final JAXBException e ) {
		throw new RuntimeException( e );
	}
}
 

public void toXML( final Object obj, final OutputStream out, final Marshaller.Listener listener ) {
	Marshaller marshaller = null;
	try {
		final JAXBContext jc = createJAXBContext( additionalClazzes );
		marshaller = jc.createMarshaller();
		marshaller.setProperty( Marshaller.JAXB_FORMATTED_OUTPUT, true );
		marshaller.setProperty( MarshallerProperties.NAMESPACE_PREFIX_MAPPER,
				new MapNamespacePrefixMapper( NAMESPACE_MAPPINGS ) );
		marshaller.setProperty( MarshallerProperties.INDENT_STRING, "\t" );
		marshaller.setEventHandler( new DefaultValidationEventHandler() );
		marshaller.setListener( listener );
		final SessionLogDelegate sessionLog = new SessionLogDelegate( AbstractSessionLog.getLog() );
		AbstractSessionLog.setLog( sessionLog );

		if ( config.isOnlyFragment() ) {
			log.info( "Create only fragment for '{}'.", obj );
			marshaller.setProperty( Marshaller.JAXB_FRAGMENT, true );
		}

		if ( config.isLightweightXml() ) {
			log.info( "Use lightweight XML for '{}'.", obj );
			lightweightMarshallerSet.add( marshaller );
			XmlUtil.addLightWeightAdapter( marshaller );
		}

		marshaller.marshal( obj, out );

		if ( sessionLog.containsMessages() ) {
			throw new RuntimeException( "Error persisting XML: " + sessionLog.getLog() );
		}
	} catch ( final JAXBException e ) {
		throw new RuntimeException( e );
	} finally {
		if ( config.isLightweightXml() && marshaller != null ) {
			lightweightMarshallerSet.remove( marshaller );
		}
	}
}
 

/** Get a {@link Unmarshaller} instance with the default configuration. */
private Unmarshaller getUnmarshaller() throws JAXBException {
  Unmarshaller unmarshaller = jaxbContext.createUnmarshaller();
  unmarshaller.setSchema(schema);
  // This handler was the default in JAXB 1.0. It fails on any exception thrown while
  // unmarshalling. In JAXB 2.0 some errors are considered recoverable and are ignored, which is
  // not what we want, so we have to set this explicitly.
  unmarshaller.setEventHandler(new DefaultValidationEventHandler());
  return unmarshaller;
}