org.apache.xerces.dom.DeferredDocumentImpl incompatible with org.dom4j.Document

Im reading some RSS from an URL and are experiencing some troubles. Initially I had a straightforward implementation like this:

SAXReader reader = new SAXReader();
Document doc = reader.read(new URL(sURL));

However, this didnt allow me to timeout the request if the response was very slow. So I changed it to :

public static org.dom4j.Document readXml(InputStream is) throws SAXException, IOException,
        ParserConfigurationException {
        DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();

        dbf.setValidating(false);
        dbf.setIgnoringComments(false);
        dbf.setIgnoringElementContentWhitespace(true);
        dbf.setNamespaceAware(true);

        DocumentBuilder db = null;
        db = dbf.ne开发者_JAVA技巧wDocumentBuilder();

        return (org.dom4j.Document)db.parse(is);
    }

     SAXReader reader = new SAXReader();

    URL myUrl = new URL(sURL);
    URLConnection c = myUrl.openConnection();
    c.setConnectTimeout(10000);
    c.setReadTimeout(10000);
    org.dom4j.Document doc = readXml(c.getInputStream());
    Element root = doc.getRootElement();

When trying this, I get a annyoing error:

org.apache.xerces.dom.DeferredDocumentImpl incompatible with org.dom4j.Document

How can I avoid this? None of the above methods are supposed to return that type of Document, and I also try to cast to the correct document type..

EDIT: The problem is db.parse(is) which returns org.w3c.dom ..

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Make sure your Element is of type org.dom4j.Element and not org.w3c.dom, javax.bind.xml, etc.

In other words, dom4j API is not compatible with Java's built-in XML API. The two simply do not mix together, unless you operate with Strings (e.g. generate XML in dom4j and parse it with Java's XML or vice versa).

---

Problem solved!

By using :

DOMReader domReader = new DOMReader();
org.dom4j.Document dom4jDoc = domReader.read(doc);
org.dom4j.Element root = (Element)dom4jDoc.getRootElement();

To create an org.dom4j.Document from the org.w3c.dom.Document