The implementation classes are defined by the particular web container
you're using. In Tomcat 3.2, see the HttpServletRequestFacade and
HttpServletResponseFacade classes in the org.apache.tomcat.facade package;
in Tomcat 4.0, look for the ApplicationRequest, ApplicationResponse,
ApplicationHttpRequest, and ApplicationHttpResponse classes in
org.apache.catalina.core.

Richard Huss
Technical Architect, Wrox Press Ltd
richardh@w...