content: /*
   * 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 mf.org.apache.xerces.impl.xs.opti;
  
  import mf.org.w3c.dom.DOMException;
  import mf.org.w3c.dom.DOMImplementation;
  import mf.org.w3c.dom.Document;
  import mf.org.w3c.dom.DocumentType;
  
  /**
   * @version $Id: SchemaDOMImplementation.java 982727 2010-08-05 18:40:07Z mrglavas $
   * @xerces.internal
   */
  final class SchemaDOMImplementation implements DOMImplementation {
  
      private static final SchemaDOMImplementation singleton = new SchemaDOMImplementation();
  
      private SchemaDOMImplementation() {
      }
  
      /**
       * NON-DOM: Obtain and return the single shared object
       */
      public static DOMImplementation getDOMImplementation() {
          return singleton;
      }
  
      @Override
      public Document createDocument(String namespaceURI, String qualifiedName, DocumentType doctype)
              throws DOMException {
          throw new DOMException(DOMException.NOT_SUPPORTED_ERR, "Method not supported");
      }
  
      @Override
      public DocumentType createDocumentType(String qualifiedName, String publicId, String systemId)
              throws DOMException {
          throw new DOMException(DOMException.NOT_SUPPORTED_ERR, "Method not supported");
      }
  
      @Override
      public Object getFeature(String feature, String version) {
          if (singleton.hasFeature(feature, version)) {
              return singleton;
          }
          return null;
      }
  
      @Override
      public boolean hasFeature(String feature, String version) {
          final boolean anyVersion = version == null || version.length() == 0;
          return (feature.equalsIgnoreCase("Core") || feature.equalsIgnoreCase("XML")) &&
                  (anyVersion || version.equals("1.0") || version.equals("2.0") || version.equals("3.0"));
      }
  
  }
  