content: /*
   *  This file is part of AndroidIDE.
   *
   *  AndroidIDE is free software: you can redistribute it and/or modify
   *  it under the terms of the GNU General Public License as published by
   *  the Free Software Foundation, either version 3 of the License, or
   *  (at your option) any later version.
   *
   *  AndroidIDE is distributed in the hope that it will be useful,
   *  but WITHOUT ANY WARRANTY; without even the implied warranty of
   *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   *  GNU General Public License for more details.
   *
   *  You should have received a copy of the GNU General Public License
   *   along with AndroidIDE.  If not, see <https://www.gnu.org/licenses/>.
   */
  
  /*
   * reserved comment block
   * DO NOT REMOVE OR ALTER!
   */
  /*
   * Copyright 1999-2002,2004 The Apache Software Foundation.
   *
   * 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.
   */
  
  package jaxp.sun.org.apache.xerces.internal.dom;
  
  import org.w3c.dom.DOMException;
  import org.w3c.dom.DOMImplementation;
  import org.w3c.dom.Document;
  import org.w3c.dom.DocumentType;
  import org.w3c.dom.Element;
  
  
  
  /**
   * The DOMImplementation class is description of a particular
   * implementation of the Document Object Model. As such its data is
   * static, shared by all instances of this implementation.
   * <P>
   * The DOM API requires that it be a real object rather than static
   * methods. However, there's nothing that says it can't be a singleton,
   * so that's how I've implemented it.
   *
   * @xerces.internal
   *
   * @since  PR-DOM-Level-1-19980818.
   */
  public class DOMImplementationImpl extends CoreDOMImplementationImpl
      implements DOMImplementation {
  
      //
      // Data
      //
  
      // static
  
      /** Dom implementation singleton. */
      static DOMImplementationImpl singleton = new DOMImplementationImpl();
  
  
      //
      // Public methods
      //
  
      /** NON-DOM: Obtain and return the single shared object */
      public static DOMImplementation getDOMImplementation() {
          return singleton;
      }
  
      //
      // DOMImplementation methods
      //
  
      /**
       * Test if the DOM implementation supports a specific "feature" --
       * currently meaning language and level thereof.
       *
       * @param feature      The package name of the feature to test.
       * In Level 1, supported values are "HTML" and "XML" (case-insensitive).
       * At this writing, com.sun.org.apache.xerces.internal.dom supports only XML.
       *
       * @param version      The version number of the feature being tested.
       * This is interpreted as "Version of the DOM API supported for the
       * specified Feature", and in Level 1 should be "1.0"
       *
       * @return    true iff this implementation is compatable with the
       * specified feature and version.
       */
      public boolean hasFeature(String feature, String version) {
  
          boolean result = super.hasFeature(feature, version);
          if (!result) {
              boolean anyVersion = version == null || version.length() == 0;
              if (feature.startsWith("+")) {
                  feature = feature.substring(1);
              }
              return (
                  (feature.equalsIgnoreCase("Events")
                      && (anyVersion || version.equals("2.0")))
                      || (feature.equalsIgnoreCase("MutationEvents")
                          && (anyVersion || version.equals("2.0")))
                      || (feature.equalsIgnoreCase("Traversal")
                          && (anyVersion || version.equals("2.0")))
                      || (feature.equalsIgnoreCase("Range")
                          && (anyVersion || version.equals("2.0")))
                      || (feature.equalsIgnoreCase("MutationEvents")
                          && (anyVersion || version.equals("2.0"))));
          }
          return result;
      } // hasFeature(String,String):boolean
  
  
  
      /**
       * Introduced in DOM Level 2. <p>
       *
       * Creates an XML Document object of the specified type with its document
       * element.
       *
       * @param namespaceURI     The namespace URI of the document
       *                         element to create, or null.
       * @param qualifiedName    The qualified name of the document
       *                         element to create.
       * @param doctype          The type of document to be created or null.<p>
       *
       *                         When doctype is not null, its
       *                         Node.ownerDocument attribute is set to
       *                         the document being created.
       * @return Document        A new Document object.
       * @throws DOMException    WRONG_DOCUMENT_ERR: Raised if doctype has
       *                         already been used with a different document.
       * @since WD-DOM-Level-2-19990923
       */
      public Document           createDocument(String namespaceURI,
                                               String qualifiedName,
                                               DocumentType doctype)
                                               throws DOMException
      {
          if(namespaceURI == null && qualifiedName == null && doctype == null){
          //if namespaceURI, qualifiedName and doctype are null, returned document is empty with
          //no document element
              return new DocumentImpl();
          }
          else if (doctype != null && doctype.getOwnerDocument() != null) {
              String msg = DOMMessageFormatter.formatMessage(DOMMessageFormatter.DOM_DOMAIN, "WRONG_DOCUMENT_ERR", null);
              throw new DOMException(DOMException.WRONG_DOCUMENT_ERR, msg);
          }
          DocumentImpl doc = new DocumentImpl(doctype);
          Element e = doc.createElementNS( namespaceURI, qualifiedName);
          doc.appendChild(e);
          return doc;
      }
  
  
  } // class DOMImplementationImpl
  