protected UnmarshalException createUnmarshalException(SAXException e) 
{
        // check the nested exception to see if it's an UnmarshalException
        Exception nested = e.getException();
        if(nested instanceof UnmarshalException)
            return (UnmarshalException)nested;
        if(nested instanceof RuntimeException)
            // typically this is an unexpected exception,
            // just throw it rather than wrap it, so that the full stack
            // trace can be displayed.
            throw (RuntimeException)nested;
        // otherwise simply wrap it
        if(nested!=null)
            return new UnmarshalException(nested);
        else
            return new UnmarshalException(e);
}

Creates an UnmarshalException from a SAXException. This is an utility method provided for the derived classes.

When a provider-implemented ContentHandler wants to throw a JAXBException, it needs to wrap the exception by a SAXException. If the unmarshaller implementation blindly wrap SAXException by JAXBException, such an exception will be a JAXBException wrapped by a SAXException wrapped by another JAXBException. This is silly.

This method checks the nested exception of SAXException and reduce those excessive wrapping.

 public A getAdapter(Class<A> type) 
{
        throw new UnsupportedOperationException();
}

 public AttachmentUnmarshaller getAttachmentUnmarshaller() 
{
        throw new UnsupportedOperationException();
}

 public ValidationEventHandler getEventHandler() throws JAXBException 
{
        return eventHandler;
}

Return the current event handler or the default event handler if one hasn't been set.

 public Listener getListener() 
{
        throw new UnsupportedOperationException();
}

 public Object getProperty(String name) throws PropertyException 
{
        if( name == null ) {
            throw new IllegalArgumentException(
                Messages.format( Messages.MUST_NOT_BE_NULL, "name" ) );
        }
        throw new PropertyException(name);
}

Default implementation of the getProperty method always throws PropertyException since there are no required properties. If a provider needs to handle additional properties, it should override this method in a derived class.

 public Schema getSchema() 
{
        throw new UnsupportedOperationException();
}

 protected XMLReader getXMLReader() throws JAXBException 
{
        if(reader==null) {
            try {
                SAXParserFactory parserFactory;
                parserFactory = SAXParserFactory.newInstance();
                parserFactory.setNamespaceAware(true);
                // there is no point in asking a validation because
                // there is no guarantee that the document will come with
                // a proper schemaLocation.
                parserFactory.setValidating(false);
                reader = parserFactory.newSAXParser().getXMLReader();
            } catch( ParserConfigurationException e ) {
                throw new JAXBException(e);
            } catch( SAXException e ) {
                throw new JAXBException(e);
            }
        }
        return reader;
}

Obtains a configured XMLReader. This method is used when the client-specified SAXSource object doesn't have XMLReader. Unmarshaller is not re-entrant, so we will only use one instance of XMLReader.

 public boolean isValidating() throws JAXBException 
{
        return validating;
}

Indicates whether or not the Unmarshaller is configured to validate during unmarshal operations.

Note: I named this method isValidating() to stay in-line with JAXP, as opposed to naming it getValidating().

 public  void setAdapter(XmlAdapter adapter) 
{
        if(adapter==null)
            throw new IllegalArgumentException();
        setAdapter((Class)adapter.getClass(),adapter);
}

 public  void setAdapter(Class<A> type,
    A adapter) 
{
        throw new UnsupportedOperationException();
}

 public  void setAttachmentUnmarshaller(AttachmentUnmarshaller au) 
{
        throw new UnsupportedOperationException();
}

 public  void setEventHandler(ValidationEventHandler handler) throws JAXBException 
{
        if( handler == null ) {
            eventHandler = new DefaultValidationEventHandler();
        } else {
            eventHandler = handler;
        }
}

Allow an application to register a validation event handler.

The validation event handler will be called by the JAXB Provider if any validation errors are encountered during calls to any of the unmarshal methods. If the client application does not register a validation event handler before invoking the unmarshal methods, then all validation events will be silently ignored and may result in unexpected behaviour.

 public  void setListener(Listener listener) 
{
        throw new UnsupportedOperationException();
}

 public  void setProperty(String name,
    Object value) throws PropertyException 
{
        if( name == null ) {
            throw new IllegalArgumentException(
                Messages.format( Messages.MUST_NOT_BE_NULL, "name" ) );
        }
        throw new PropertyException(name, value);
}

Default implementation of the setProperty method always throws PropertyException since there are no required properties. If a provider needs to handle additional properties, it should override this method in a derived class.

 public  void setSchema(Schema schema) 
{
        throw new UnsupportedOperationException();
}

 public  void setValidating(boolean validating) throws JAXBException 
{
        this.validating = validating;
}

Specifies whether or not the Unmarshaller should validate during unmarshal operations. By default, the Unmarshaller does not validate.

This method may only be invoked before or after calling one of the unmarshal methods.

 public Object unmarshal(Source source) throws JAXBException 
{
        if( source == null ) {
            throw new IllegalArgumentException(
                Messages.format( Messages.MUST_NOT_BE_NULL, "source" ) );
        }
        if(source instanceof SAXSource)
            return unmarshal( (SAXSource)source );
        if(source instanceof StreamSource)
            return unmarshal( streamSourceToInputSource((StreamSource)source));
        if(source instanceof DOMSource)
            return unmarshal( ((DOMSource)source).getNode() );
        // we don't handle other types of Source
        throw new IllegalArgumentException();
}

 public final Object unmarshal(InputSource source) throws JAXBException 
{
        if( source == null ) {
            throw new IllegalArgumentException(
                Messages.format( Messages.MUST_NOT_BE_NULL, "source" ) );
        }
        return unmarshal( getXMLReader(), source );
}

 public final Object unmarshal(URL url) throws JAXBException 
{
        if( url == null ) {
            throw new IllegalArgumentException(
                Messages.format( Messages.MUST_NOT_BE_NULL, "url" ) );
        }
        return unmarshal( url.toExternalForm() );
}

 public final Object unmarshal(File f) throws JAXBException 
{
        if( f == null ) {
            throw new IllegalArgumentException(
                Messages.format( Messages.MUST_NOT_BE_NULL, "file" ) );
        }
        try {
            // copied from JAXP
            String path = f.getAbsolutePath();
            if (File.separatorChar != '/')
                path = path.replace(File.separatorChar, '/');
            if (!path.startsWith("/"))
                path = "/" + path;
            if (!path.endsWith("/") && f.isDirectory())
                path = path + "/";
            return unmarshal(new URL("file", "", path));
        } catch( MalformedURLException e ) {
            throw new IllegalArgumentException(e.getMessage());
        }
}

 public final Object unmarshal(InputStream is) throws JAXBException 
{
        if( is == null ) {
            throw new IllegalArgumentException(
                Messages.format( Messages.MUST_NOT_BE_NULL, "is" ) );
        }
        InputSource isrc = new InputSource( is );
        return unmarshal( isrc );
}

 public final Object unmarshal(Reader reader) throws JAXBException 
{
        if( reader == null ) {
            throw new IllegalArgumentException(
                Messages.format( Messages.MUST_NOT_BE_NULL, "reader" ) );
        }
        InputSource isrc = new InputSource( reader );
        return unmarshal( isrc );
}

 public Object unmarshal(XMLEventReader reader) throws JAXBException 
{
        throw new UnsupportedOperationException();
}

 public Object unmarshal(XMLStreamReader reader) throws JAXBException 
{
        throw new UnsupportedOperationException();
}

 abstract protected Object unmarshal(XMLReader reader,
    InputSource source) throws JAXBException
Unmarshals an object by using the specified XMLReader and the InputSource.

The callee should call the setErrorHandler method of the XMLReader
so that errors are passed to the client-specified ValidationEventHandler.

 public JAXBElement<T> unmarshal(Node node,
    Class<T> expectedType) throws JAXBException 
{
        throw new UnsupportedOperationException();
}

 public JAXBElement<T> unmarshal(Source source,
    Class<T> expectedType) throws JAXBException 
{
        throw new UnsupportedOperationException();
}

 public JAXBElement<T> unmarshal(XMLStreamReader reader,
    Class<T> expectedType) throws JAXBException 
{
        throw new UnsupportedOperationException();
}

 public JAXBElement<T> unmarshal(XMLEventReader reader,
    Class<T> expectedType) throws JAXBException 
{
        throw new UnsupportedOperationException();
}