Class NodeModel

src/main/java/freemarker/ext/dom/NodeModel.java:97–652

A base class for wrapping a W3C DOM Node as a FreeMarker template model. @author Jonathan Revusky @version $Id: NodeModel.java,v 1.80 2005/06/22 11:33:31 ddekany Exp $

 * @version $Id: NodeModel.java,v 1.80 2005/06/22 11:33:31 ddekany Exp $
 */
abstract public class NodeModel
implements TemplateNodeModel, TemplateHashModel, TemplateSequenceModel,
    AdapterTemplateModel, WrapperTemplateModel
{

    static final Logger logger = Logger.getLogger("freemarker.dom");
    
    static private DocumentBuilderFactory docBuilderFactory;
    
    static private Map xpathSupportMap = Collections.synchronizedMap(new WeakHashMap());
    
    static private XPathSupport jaxenXPathSupport;
    
    static private ErrorHandler errorHandler;
    
    static Class xpathSupportClass;
    
    static {
        try {
            useDefaultXPathSupport();
        } catch (Exception e) {
            // do nothing
        }
        if (xpathSupportClass == null && logger.isWarnEnabled()) {
            logger.warn("No XPath support is available.");
        }
    }
    
    /**
     * The W3C DOM Node being wrapped.
     */
    final Node node;
    private TemplateSequenceModel children;
    private NodeModel parent;
    
    /**
     * Sets the DOM Parser implementation to be used when building NodeModel
     * objects from XML files.
     */
    static public void setDocumentBuilderFactory(DocumentBuilderFactory docBuilderFactory) {
        NodeModel.docBuilderFactory = docBuilderFactory;
    }
    
    /**
     * @return the DOM Parser implementation that is used when 
     * building NodeModel objects from XML files.
     */
    static public DocumentBuilderFactory getDocumentBuilderFactory() {
        if (docBuilderFactory == null) {
            docBuilderFactory = DocumentBuilderFactory.newInstance();
            docBuilderFactory.setNamespaceAware(true);
            docBuilderFactory.setIgnoringElementContentWhitespace(true);
        }
        return docBuilderFactory;
    }
    
    /**
     * sets the error handler to use when parsing the document.