/**
    * Logback: the reliable, generic, fast and flexible logging framework.
    * Copyright (C) 1999-2015, QOS.ch. All rights reserved.
    *
    * This program and the accompanying materials are dual-licensed under
    * either the terms of the Eclipse Public License v1.0 as published by
    * the Eclipse Foundation
    *
    *   or (per the licensee's choosing)
   *
   * under the terms of the GNU Lesser General Public License version 2.1
   * as published by the Free Software Foundation.
   */
  package ch.qos.logback.classic.html;
  
  import java.io.InputStream;
  import java.util.HashMap;
  import java.util.Map;
  
  import org.xml.sax.EntityResolver;
  import org.xml.sax.InputSource;
  
  public class XHTMLEntityResolver implements EntityResolver {
  
      // key: public id, value: relative path to DTD file
      static Map<String, String> entityMap = new HashMap<String, String>();
  
      static {
          entityMap.put("-//W3C//DTD XHTML 1.0 Strict//EN", "/dtd/xhtml1-strict.dtd");
          entityMap.put("-//W3C//ENTITIES Latin 1 for XHTML//EN", "/dtd/xhtml-lat1.ent");
          entityMap.put("-//W3C//ENTITIES Symbols for XHTML//EN", "/dtd/xhtml-symbol.ent");
          entityMap.put("-//W3C//ENTITIES Special for XHTML//EN", "/dtd/xhtml-special.ent");
      }
  
      public InputSource resolveEntity(String publicId, String systemId) {
          // System.out.println(publicId);
          final String relativePath = (String) entityMap.get(publicId);
  
          if (relativePath != null) {
              Class<?> clazz = getClass();
              InputStream in = clazz.getResourceAsStream(relativePath);
              if (in == null) {
                  return null;
              } else {
                  return new InputSource(in);
              }
          } else {
              return null;
          }
      }
  }