XOM API for Processing XML with Java

[Wolfgang Hoschek <whoschek AT lbl.gov>]

I'm working a lot with converting from/to DOM and XOM, for example via
DOMConverter.convert(org.w3c.dom.Document, 
org.w3c.dom.DOMImplementation impl).
Dealing with JAXP and all its factory layers may be flexible but is 
also quite cumbersome to get a default DOMImplementation.
XOM users probably would like to avoid digging into JAXP as much as 
possible.
So here is a proposal to add a method getDOMImplementation() or perhaps 
better named getDefaultDOMImplementation() to DOMConverter:


        private static org.w3c.dom.DOMImplementation domImpl = null;

	public static synchronized org.w3c.dom.DOMImplementation 
getDOMImplementation() {
                if (domImpl == null) {
                        javax.xml.parsers.DocumentBuilderFactory factory =
                                
javax.xml.parsers.DocumentBuilderFactory.newInstance();
                        factory.setNamespaceAware(true);
                        try {
                                domImpl = 
factory.newDocumentBuilder().getDOMImplementation();
                        } catch 
(javax.xml.parsers.ParserConfigurationException e) {
                                // do nothing special; just return null 
domImpl
                        }
                }

                return domImpl;
        }