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 2001, 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 jaxp.sun.org.apache.xerces.internal.impl.xs.XSImplementationImpl;
  import org.w3c.dom.DOMImplementationList;
  import org.w3c.dom.DOMImplementation;
  import java.util.Vector;
  
  /**
   * Allows to retrieve <code>XSImplementation</code>, DOM Level 3 Core and LS implementations
   * and PSVI implementation.
   * <p>See also the <a href='http://www.w3.org/TR/2004/REC-DOM-Level-3-Core-20040407/core.html#DOMImplementationSource'>Document Object Model (DOM) Level 3 Core Specification</a>.
   *
   * @xerces.internal
   *
   * @author Elena Litani, IBM
   */
  public class DOMXSImplementationSourceImpl
      extends DOMImplementationSourceImpl {
  
      /**
       * A method to request a DOM implementation.
       * @param features A string that specifies which features are required.
       *   This is a space separated list in which each feature is specified
       *   by its name optionally followed by a space and a version number.
       *   This is something like: "XML 1.0 Traversal Events 2.0"
       * @return An implementation that has the desired features, or
       *   <code>null</code> if this source has none.
       */
      public DOMImplementation getDOMImplementation(String features) {
          DOMImplementation impl = super.getDOMImplementation(features);
          if (impl != null){
              return impl;
          }
          // if not try the PSVIDOMImplementation
          impl = PSVIDOMImplementationImpl.getDOMImplementation();
          if (testImpl(impl, features)) {
              return impl;
          }
          // if not try the XSImplementation
          impl = XSImplementationImpl.getDOMImplementation();
          if (testImpl(impl, features)) {
              return impl;
          }
  
          return null;
      }
  
      /**
       * A method to request a list of DOM implementations that support the
       * specified features and versions, as specified in .
       * @param features A string that specifies which features and versions
       *   are required. This is a space separated list in which each feature
       *   is specified by its name optionally followed by a space and a
       *   version number. This is something like: "XML 3.0 Traversal +Events
       *   2.0"
       * @return A list of DOM implementations that support the desired
       *   features.
       */
      public DOMImplementationList getDOMImplementationList(String features) {
          final Vector implementations = new Vector();
  
          // first check whether the CoreDOMImplementation would do
          DOMImplementationList list = super.getDOMImplementationList(features);
          //Add core DOMImplementations
          for (int i=0; i < list.getLength(); i++ ) {
              implementations.addElement(list.item(i));
          }
  
          DOMImplementation impl = PSVIDOMImplementationImpl.getDOMImplementation();
          if (testImpl(impl, features)) {
              implementations.addElement(impl);
          }
  
          impl = XSImplementationImpl.getDOMImplementation();
          if (testImpl(impl, features)) {
              implementations.addElement(impl);
          }
          return new DOMImplementationListImpl(implementations);
      }
  }
  