// to avoid exceptions, inform wrapper to ignore illegal states
// for getWriter/Stream.
ServletResponse servletResponse = (ServletResponse) extContext
.getRequestMap().get(
BaseFilter.RESPONSE_WRAPPER_ATTRIBUTE);
servletResponse.resetBuffer();
servletWriter = servletResponse.getWriter();
((FilterServletResponseWrapper) servletResponse)
.setUseNullStream(true);
} else {
servletWriter = getWriter(extContext);