From: Lulseged Zerfu <lulseged.zerfu_at_ericsson.com>
Date: Tue, 2 Jul 2013 04:46:58 +0000

Hi

Can I in this way delete, add or modify an element or attribute?

Thanks

-----Original Message-----
From: Hank Ratzesberger [mailto:xml_at_xmlwerks.com]
Sent: den 1 juli 2013 17:59
To: users_at_jaxb.java.net
Subject: Re: XPATH and JAXB

Hi BR,

I think what you are looking for is the JAXB binder method, that can map a JAXB element to a document, then you can use XPath on the doc, then the binder will sync the changes:

try {
JAXBContext jaxbContext = JAXBContext.newInstance( com.blah.blah.MyType.class );
       QName qname = new QName("http://www.example.com/schema", "myObject"); Binder<Node> binder = jaxbContext.createBinder(); DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
//dbf.setNamespaceAware(false); // This was tested and does not work, needs a namespace context dbf.setValidating(false); DocumentBuilder db = dbf.newDocumentBuilder();
       Document doc = db.newDocument();

       //Binder will maintains association between two views.
       binder.marshal( new JAXBElement<MyType>(qname, com.blah.blah.MyType.class, MyType), doc );

       XPath xpath = XPathFactory.newInstance().newXPath();
       xpath.setNamespaceContext( new MyNamespaceContext() );

       // Example xpath
       //Node node = (Node) xpath.evaluate("/ns:thing", doc, XPathConstants.NODE );


        Node n = (Node) xpath.evaluate( path, doc, XPathConstants.NODE );
       if (n != null) {
        n.setTextContent( text );
       }

// And here is where you sync things up

       binder.updateJAXB( doc );

} catch( Exception e ) {
//e.printStackTrace();
log.error( e.getClass() + ": " + e.getMessage() ); return null; } // These are the specific exceptions:
//catch (JAXBException e) {
// e.printStackTrace();
//} catch (XPathExpressionException e) { // e.printStackTrace(); //} catch (ParserConfigurationException e) { // e.printStackTrace(); //} catch (TransformerException e) { // e.printStackTrace(); //} //

Regards,
Hank


On Mon, Jul 1, 2013 at 1:30 AM, Lulseged Zerfu <lulseged.zerfu_at_ericsson.com> wrote:
> Hi
>
>
>
> I started to use JAXB and everything works fine. Now I need to add,
> modify or delete element or attribute and I have to use XPATH.
>
>
>
> Does JAXB works with XPATH? Or are there any other implementation?
>
>
>
> Any road map in mind?
>
>
>
> Any example?
>
>
>
> BR
>
> Lulseged

--
Hank Ratzesberger
XMLWerks.com