javax.xml.bind

Interface UnmarshallerHandler

Contents
  • All Superinterfaces:
    ContentHandler

    public interface UnmarshallerHandler
extends ContentHandler
    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.

    Since:
    JAXB1.0
    See Also:
    Unmarshaller.getUnmarshallerHandler()

    • Method Detail

      • getResult

        Object getResult()
                 throws JAXBException,
                        IllegalStateException
        Obtains the unmarshalled result. This method can be called only after this handler receives the endDocument SAX event.
        Returns:
        always return a non-null valid object which was unmarshalled.
        Throws:
        IllegalStateException - if this method is called before this handler receives the endDocument event.
        JAXBException - if there is any unmarshalling error. Note that the implementation is allowed to throw SAXException during the parsing when it finds an error.

Document created the 11/06/2005, last modified the 04/03/2020
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