Obtaining org.w3c.dom.html implementation?

Question

I'm would like to obtain implementations of the org.w3c.dom.html interfaces so that I can create HTML documents/fragments from scratch (as opposed to parsing files). After some pretty lengthy investigation (and much frustration), it looks like I need to (as one possible option) use JAXP to obtain implementation-independent versions of those interfaces. I still can't figure out how to wire everything up.
Any help would be appreciated.
Thanks,
Gary

Answer 1

I've been able to get an instance of DOMImplementation using the following code:
private DOMImplementation getDomImplementation() throws ParserConfigurationException {
    DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
    DocumentBuilder builder = factory.newDocumentBuilder();
    return builder.getDOMImplementation();
    // // get an instance of the DOMImplementation registry
    // DOMImplementationRegistry registry =
    // DOMImplementationRegistry.newInstance();
    // // get a DOM implementation the Level 3 XML module
    // return registry.getDOMImplementation("XML 3.0");
}I tried casting the returned DOMImplementation to HTMLDOMImplementation but received a cast exception.
The commented code was actually my first unsuccessful attempt (it would return null). I tried calling
System.getProperty("org.w3c.dom.DOMImplementationSourceList") just to see what was listed and it also returned null. I'm guessing that maybe I need to configure/install/register/etc. an implementation but I'm not sure where to start with that. I downloaded the J2SE 5.0 source code and discovered the com.sun.org.apache.html.internal.dom package which contains implementations of all the interfaces I need but I'm not sure how to point to them.
This seems much harder than it should be. Any help would be appreciated.
Thanks,
Gary