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Re: [wtp-dev] Psychopath XPath 2.0

Currently Psychopath Xpath processor uses XercesLoader class to load bytestream and create org.w3c.dom.Document and it can be passed to evaluate the Xpath.

 InputStream is = new FileInputStream("resources/test.xml");
 DOMLoader loader = new XercesLoader(); 
 Document doc = loader.load(is);

I created org.w3c.dom.Document using axiom and passed it to Psychopath.

    OMElement documentElement = new StAXOMBuilder("resources/test.xml").getDocumentElement();
    XMLStreamReader llomReader = documentElement.getXMLStreamReader();
    OMFactory doomFactory = DOOMAbstractFactory.getOMFactory();
    StAXOMBuilder doomBuilder = new StAXOMBuilder(doomFactory, llomReader);

    //Get the document element
    OMElement newElem = doomBuilder.getDocumentElement(); 

    Document doc2 =  getDomDocument(newElem);

    public static org.w3c.dom.Document getDomDocument(OMElement element){  
    OMFactory doomFactory = DOOMAbstractFactory.getOMFactory();  
    StAXOMBuilder doomBuilder = new StAXOMBuilder(doomFactory,element.getXMLStreamReader());  
    return (org.w3c.dom.Document) doomBuilder.getDocument();  
  }

But when passing doc2 to evaluate XPath in Psychopath it gives the error

org.w3c.dom.DOMException: NOT_SUPPORTED_ERR: The implementation does not support the requested type of object or operation.

Needs an explanation. 



On Wed, Sep 11, 2013 at 5:45 PM, Asiri Liyana Arachchi <asiriwork@xxxxxxxxx> wrote:
That was exactly the mistake I did. Thank you for pointing that out. After removing  
"import com.sun.org.apache.xerces.internal.xs.ElementPSVI;
import com.sun.org.apache.xerces.internal.xs.XSModel;
import com.sun.xml.internal.ws.api.pipe.Engine;
"
these imports code worked fine. 

Thank you.

Regards
Asiri


On Wed, Sep 11, 2013 at 5:22 PM, Jesper Steen Møller <jesper@xxxxxxxxxxxxx> wrote:

On 11/09/2013, at 13.08, Asiri Liyana Arachchi wrote:

I've downloaded Psychopath and other dependencies and checked it with using the code provided here [1] for non schema aware processing. It shows two errors 
1) constructor Engine is undefined. 
2)The method parseExpression(String, StaticContextBuilder) is undefined for the type Engine


I'm guessing you've imported the wrong 'Engine' class. You need org.eclipse.wst.xml.xpath2.processor.Engine. it looks like you have com.sun.xml.internal.ws.api.pipe.Engine instead.


Is there a mailing list to get help for psychopath processor issues? 

There is a forum for WTP [1], but with very little XPath2 contents, so I don't watch it regularly. If you post your XPath2 implementation questions  there, please send me a mail to let me know to look there. Or - for more general XPath2 usage questions, you should consider using StackOverflow, there are many helpful souls out there, too.


-Jesper


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