Unmarshaller implemented as SAX ContentHandler.

Applications can use this interface to use their JAXB provider as a component in an XML pipeline. For example:

JAXBContext context = JAXBContext.newInstance( "org.acme.foo" );

       Unmarshaller unmarshaller = context.createUnmarshaller();

       UnmarshallerHandler unmarshallerHandler = unmarshaller.getUnmarshallerHandler();

       SAXParserFactory spf = SAXParserFactory.newInstance();
       spf.setNamespaceAware( true );

       XMLReader xmlReader = spf.newSAXParser().getXMLReader();
       xmlReader.setContentHandler( unmarshallerHandler );
       xmlReader.parse(new InputSource( new FileInputStream( XML_FILE ) ) );

       MyObject myObject= (MyObject)unmarshallerHandler.getResult();

This interface is reusable: even if the user fails to unmarshal an object, s/he can still start a new round of unmarshalling.