JAXBContextImpl.java 文件源码

/**
 * Creates a new DOM document.
 */
static Document createDom() {
    synchronized(JAXBContextImpl.class) {
        if(db==null) {
            try {
                DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
                dbf.setNamespaceAware(true);
                db = dbf.newDocumentBuilder();
            } catch (ParserConfigurationException e) {
                // impossible
                throw new FactoryConfigurationError(e);
            }
        }
        return db.newDocument();
    }
}