package org.apache.maven.doxia.siterenderer;
   
   /*
    * 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.
   */
  
  import java.io.IOException;
  
  import org.xml.sax.EntityResolver;
  import org.xml.sax.InputSource;
  import org.xml.sax.SAXException;
  
  /**
   *
   * @author ltheussl
   *
   * @since 1.2
   */
  public class XhtmlEntityResolver
      implements EntityResolver
  {
      private static final String XHTML_PUBLIC_ID = "-//W3C//DTD XHTML 1.0 Transitional//EN";
  
      private static final String DTD = "/dtd/xhtml1-transitional.dtd";
  
      private static final String LAT1_PUBLIC_ID = "-//W3C//ENTITIES Latin 1 for XHTML//EN";
  
      private static final String LAT1 = "/dtd/xhtml-lat1.ent";
  
      private static final String SYMBOL_PUBLIC_ID = "-//W3C//ENTITIES Symbols for XHTML//EN";
  
      private static final String SYMBOL = "/dtd/xhtml-symbol.ent";
  
      private static final String SPECIAL_PUBLIC_ID = "-//W3C//ENTITIES Special for XHTML//EN";
  
      private static final String SPECIAL = "/dtd/xhtml-special.ent";
  
      /** {@inheritDoc} */
      public InputSource resolveEntity( String publicId, String systemId )
          throws SAXException, IOException
      {
          if ( publicId == null )
          {
              return null;
          }
  
          if ( publicId.equals( XHTML_PUBLIC_ID ) )
          {
              return new InputSource( XhtmlEntityResolver.class.getResourceAsStream( DTD ) );
          }
          else if ( publicId.equals( LAT1_PUBLIC_ID ) )
          {
              return new InputSource( XhtmlEntityResolver.class.getResourceAsStream( LAT1 ) );
          }
          else if ( publicId.equals( SYMBOL_PUBLIC_ID ) )
          {
              return new InputSource( XhtmlEntityResolver.class.getResourceAsStream( SYMBOL ) );
          }
          else if ( publicId.equals( SPECIAL_PUBLIC_ID ) )
          {
              return new InputSource( XhtmlEntityResolver.class.getResourceAsStream( SPECIAL ) );
          }
          else
          {
              return null;
          }
      }
  }