https://xerces.apache.org/xerces2-j/: Xerces2 is the next generation of high performance, fully compliant XML parsers in the Apache Xerces family. This new version of Xerces introduces the Xerces Native Interface (XNI), a complete framework for building parser components and configurations that is extremely modular and easy to program. The Apache Xerces2 parser is the reference implementation of XNI but other parser components, configurations, and parsers can be written using the Xerces Native Interface. For complete design and implementation documents, refer to the XNI Manual. Xerces2 is a fully conforming XML Schema 1.0 processor. A partial experimental implementation of the XML Schema 1.1 Structures and Datatypes Working Drafts (December 2009) and an experimental implementation of the XML Schema Definition Language (XSD): Component Designators (SCD) Candidate Recommendation (January 2010) are provided for evaluation. For more information, refer to the XML Schema page. Xerces2 also provides a complete implementation of the Document Object Model Level 3 Core and Load/Save W3C Recommendations and provides a complete implementation of the XML Inclusions (XInclude) W3C Recommendation. It also provides support for OASIS XML Catalogs v1.1. Xerces2 is able to parse documents written according to the XML 1.1 Recommendation, except that it does not yet provide an option to enable normalization checking as described in section 2.13 of this specification. It also handles namespaces according to the XML Namespaces 1.1 Recommendation, and will correctly serialize XML 1.1 documents if the DOM level 3 load/save APIs are in use. 
/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.xerces.impl.xs.opti;

import org.w3c.dom.DOMException;
import org.w3c.dom.Document;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.w3c.dom.UserDataHandler;



Author:Rahul Srivastava, Sun Microsystems Inc.
@xerces.internal
Version:$Id: DefaultNode.java 699892 2008-09-28 21:08:27Z mrglavas $
/**
 * @xerces.internal  
 * 
 * @author Rahul Srivastava, Sun Microsystems Inc.
 *
 * @version $Id: DefaultNode.java 699892 2008-09-28 21:08:27Z mrglavas $
 */
public class DefaultNode implements Node {

    // default constructor
    public DefaultNode() {
    }
    
    //
    // org.w3c.dom.Node methods
    //
    
    // getter methods
    public String getNodeName() {
    	return null;
    }


    public String getNodeValue() throws DOMException {
    	return null;
    }


    public short getNodeType() {
    	return -1;
    }


    public Node getParentNode() {
    	return null;
    }


    public NodeList getChildNodes() {
    	return null;
    }


    public Node getFirstChild() {
    	return null;
    }


    public Node getLastChild() {
    	return null;
    }


    public Node getPreviousSibling() {
    	return null;
    }


    public Node getNextSibling() {
    	return null;
    }


    public NamedNodeMap getAttributes() {
    	return null;
    }


    public Document getOwnerDocument() {
    	return null;
    }


    public boolean hasChildNodes() {
    	return false;
    }


    public Node cloneNode(boolean deep) {
    	return null;
    }


    public void normalize() {
    }


    public boolean isSupported(String feature, String version) {
    	return false;
    }


    public String getNamespaceURI() {
    	return null;
    }


    public String getPrefix() {
    	return null;
    }


    public String getLocalName() {
    	return null;
    }
    
DOM Level 3
/** DOM Level 3*/
    public String getBaseURI(){
        return null;
    }



    public boolean hasAttributes() {
    	return false;
    }
    
    // setter methods
    public void setNodeValue(String nodeValue) throws DOMException {
    	throw new DOMException(DOMException.NOT_SUPPORTED_ERR, "Method not supported");
    }


    public Node insertBefore(Node newChild, Node refChild) throws DOMException {
    	throw new DOMException(DOMException.NOT_SUPPORTED_ERR, "Method not supported");
    }


    public Node replaceChild(Node newChild, Node oldChild) throws DOMException {
    	throw new DOMException(DOMException.NOT_SUPPORTED_ERR, "Method not supported");
    }


    public Node removeChild(Node oldChild) throws DOMException {
    	throw new DOMException(DOMException.NOT_SUPPORTED_ERR, "Method not supported");
    }


    public Node appendChild(Node newChild) throws DOMException {
    	throw new DOMException(DOMException.NOT_SUPPORTED_ERR, "Method not supported");
    }


    public void setPrefix(String prefix) throws DOMException {
    	throw new DOMException(DOMException.NOT_SUPPORTED_ERR, "Method not supported");
    }
    
    public short compareDocumentPosition(Node other){
        throw new DOMException(DOMException.NOT_SUPPORTED_ERR, "Method not supported");
    }
    
    public String getTextContent() throws DOMException{
        throw new DOMException(DOMException.NOT_SUPPORTED_ERR, "Method not supported");
    }
    public void setTextContent(String textContent)throws DOMException{
        throw new DOMException(DOMException.NOT_SUPPORTED_ERR, "Method not supported");
    }
    public boolean isSameNode(Node other){
        throw new DOMException(DOMException.NOT_SUPPORTED_ERR, "Method not supported");

    }
    public String lookupPrefix(String namespaceURI){
        throw new DOMException(DOMException.NOT_SUPPORTED_ERR, "Method not supported");
                                        }
    public boolean isDefaultNamespace(String namespaceURI){
        throw new DOMException(DOMException.NOT_SUPPORTED_ERR, "Method not supported");
    }
    
    public String lookupNamespaceURI(String prefix){
        throw new DOMException(DOMException.NOT_SUPPORTED_ERR, "Method not supported");
    }
    
    public boolean isEqualNode(Node arg){
       throw new DOMException(DOMException.NOT_SUPPORTED_ERR, "Method not supported");

    }
    
    public Object getFeature(String feature, String version){
        return null;
    }
    public Object setUserData(String key,  Object data, UserDataHandler handler){
       throw new DOMException(DOMException.NOT_SUPPORTED_ERR, "Method not supported");                              
    }
    public Object getUserData(String key){
        return null;
    }


}