001    /*
002     * Copyright 2002 - 2007 JEuclid, http://jeuclid.sf.net
003     *
004     * Licensed under the Apache License, Version 2.0 (the "License");
005     * you may not use this file except in compliance with the License.
006     * You may obtain a copy of the License at
007     *
008     *      http://www.apache.org/licenses/LICENSE-2.0
009     *
010     * Unless required by applicable law or agreed to in writing, software
011     * distributed under the License is distributed on an "AS IS" BASIS,
012     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013     * See the License for the specific language governing permissions and
014     * limitations under the License.
015     */
016    
017    /* $Id: JEuclidDOMImplementation.java,v 88b901bf20fb 2008/06/07 14:12:27 maxberger $ */
018    
019    package net.sourceforge.jeuclid.elements.generic;
020    
021    import org.apache.batik.dom.AbstractDOMImplementation;
022    import org.w3c.dom.DOMImplementation;
023    import org.w3c.dom.Document;
024    import org.w3c.dom.DocumentType;
025    
026    /**
027     * @version $Revision: 88b901bf20fb $
028     */
029    public final class JEuclidDOMImplementation extends AbstractDOMImplementation {
030    
031        private static final long serialVersionUID = 1L;
032    
033        private static final class SingletonHolder {
034            private static final JEuclidDOMImplementation INSTANCE = new JEuclidDOMImplementation();
035    
036            private SingletonHolder() {
037            }
038        }
039    
040        /**
041         * Default Constructor.
042         */
043        protected JEuclidDOMImplementation() {
044            super();
045        }
046    
047        /** {@inheritDoc} */
048        public Document createDocument(final String namespaceURI,
049                final String qualifiedName, final DocumentType doctype) {
050            final Document result = new DocumentElement(doctype);
051            result.appendChild(result.createElementNS(namespaceURI, qualifiedName));
052            return result;
053        }
054    
055        /** {@inheritDoc} */
056        public DocumentType createDocumentType(final String qualifiedName,
057                final String publicId, final String systemId) {
058            throw new UnsupportedOperationException();
059        }
060    
061        /**
062         * Retrieve the singleton instance of this {@link DOMImplementation}.
063         * 
064         * @return a {@link DOMImplementation} implementing MathML DOM.
065         */
066        public static DOMImplementation getInstance() {
067            return JEuclidDOMImplementation.SingletonHolder.INSTANCE;
068        }
069    }