code: protected Resource getResource(String pathInContext) throws IOException
      {
          Resource r = (_resourceBase == null) ? _httpContext.getResource(pathInContext) : _resourceBase.addPath(pathInContext);
          
          if (log.isDebugEnabled())
              log.debug("RESOURCE=" + r);
          return r;
      }
docs: get Resource to serve. Map a path to a resource. The default implementation calls
  HttpContext.getResource but derived servlets may provide their own mapping.
  
  @param pathInContext The path to find a resource for.
  @return The resource to serve.