package com.atlassian.plugins.rest.module.servlet;
   
   import javax.servlet.Filter;
   import javax.servlet.FilterChain;
   import javax.servlet.FilterConfig;
   import javax.servlet.ServletException;
   import javax.servlet.ServletRequest;
   import javax.servlet.ServletResponse;
   import javax.servlet.http.HttpServletRequest;
  import javax.servlet.http.HttpServletResponse;
  import java.io.IOException;
  
  public class RestServletUtilsUpdaterFilter implements Filter {
  
      public void init(FilterConfig filterConfig) throws ServletException {
      }
  
      protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain) throws IOException, ServletException {
          // This sucks, I hate relying on ThreadLocals but we have to do that in order to use the SAL UserManager API. 
          ServletUtils.setHttpServletRequest(request);
          try {
              filterChain.doFilter(request, response);
          } finally {
              ServletUtils.setHttpServletRequest(null);
          }
      }
  
      /**
       * Simply calls {@link #doFilterInternal(HttpServletRequest, HttpServletResponse, FilterChain)}
       *
       * @see #doFilterInternal(HttpServletRequest, HttpServletResponse, FilterChain)
       */
      public final void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
          doFilterInternal((HttpServletRequest) request, (HttpServletResponse) response, chain);
      }
  
      public void destroy() {
      }
  }