org.davesag.generica.servlet.filter
Class PresentationFilter

java.lang.Object
  org.davesag.generica.servlet.filter.PresentationFilter

All Implemented Interfaces:

Filter

public class PresentationFilter

extends Object

implements Filter

The PresentationFilter triggers the supplied Presenter.

Since:

Generica 1.0

Version:

CVS Revision $Id: PresentationFilter.java,v 1.4 2004/03/30 13:00:42 davesag Exp $

Author:

Dave Sag http://www.davesag.com

Constructor Summary

PresentationFilter()

Method Summary

void	destroy() just nulls out the instance variables.
void	doFilter(ServletRequest request, ServletResponse response, FilterChain chain) checks for the user key in the current session.
void	init(FilterConfig config) Initialise the filter with the params from the web.xml file.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

PresentationFilter

public PresentationFilter()

Method Detail

init

public void init(FilterConfig config)
          throws ServletException

Initialise the filter with the params from the web.xml file. The required param is "presenter".

Specified by:

init in interface Filter

Parameters:

config - The FilterConfig.

Throws:

ServletException - if could not load a presenter.

destroy

public void destroy()

just nulls out the instance variables.

Specified by:

destroy in interface Filter

doFilter

public void doFilter(ServletRequest request,
                     ServletResponse response,
                     FilterChain chain)
              throws IOException,
                     ServletException

checks for the user key in the current session. if it's there then checks the class of the user against the userClass provided and bounces to the login page if the correct user type is not logged in.

Specified by:

doFilter in interface Filter

Parameters:

request - The ServletRequest

response - The ServletResponse

chain - The FilterChain

Throws:

IOException - if some IO problem happens.

ServletException - if some any other kind of problem happens.