/*

  * Copyright 2002 - 2007 JEuclid, http://jeuclid.sf.net

  *

  * Licensed 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.

  */

 /* $Id: JEuclidDOMImplementation.java,v 88b901bf20fb 2008/06/07 14:12:27 maxberger $ */

 package net.sourceforge.jeuclid.elements.generic;

 import org.apache.batik.dom.AbstractDOMImplementation;

 import org.w3c.dom.DOMImplementation;

 import org.w3c.dom.Document;

 import org.w3c.dom.DocumentType;

 /**

  * @version $Revision: 88b901bf20fb $

  */

 public final class JEuclidDOMImplementation extends AbstractDOMImplementation {

     private static final long serialVersionUID = 1L;

     private static final class SingletonHolder {

         private static final JEuclidDOMImplementation INSTANCE = new JEuclidDOMImplementation();

         private SingletonHolder() {

         }

     }

     /**

      * Default Constructor.

      */

     protected JEuclidDOMImplementation() {

         super();

     }

     /** {@inheritDoc} */

     public Document createDocument(final String namespaceURI,

             final String qualifiedName, final DocumentType doctype) {

         final Document result = new DocumentElement(doctype);

         result.appendChild(result.createElementNS(namespaceURI, qualifiedName));

         return result;

     }

     /** {@inheritDoc} */

     public DocumentType createDocumentType(final String qualifiedName,

             final String publicId, final String systemId) {

         throw new UnsupportedOperationException();

     }

     /**

      * Retrieve the singleton instance of this {@link DOMImplementation}.

      * 

      * @return a {@link DOMImplementation} implementing MathML DOM.

      */

     public static DOMImplementation getInstance() {

         return JEuclidDOMImplementation.SingletonHolder.INSTANCE;

     }

 }