How do I find out which JAXP implementation is in use and where it was loaded from?

I would like to provide diagnostic information about what JAXP implementation is in use, and which JAR file it was loaded from.

One way to achieve this is to create in instance of, for example, a DocumentBuilderFactory, and then inspect the properties of that class:

private static String GetJaxpImplementation() {
    DocumentBuilderFactory documentBuilderFactory = DocumentBuilderFactory.newInstance();
    Class<? extends DocumentBuilderFactory> c = documentBuilderFactory.getClass();
    Package p = c.getPackage();
    CodeSource source = c.getProtectionDomain().getCodeSource();
    return MessageFormat.format(
            "Using JAXP implementation ''{0}'' ({1}) version {2} ({3}){4}",
            p.getName(),
            p.getImplementationVendor(),
            p.getSpecificationVersion(),
            p.getImplementationVersion(),
            source == null ? "." : " loaded from: " + source.getLocation());
}

Is there a better way to achieve this, perhaps without having to create a DocumentBuilderFactory?