URL rewriting

[WantToKnow]

How can I use URL rewriting to change the web application context
name ?
Example :
I want to redirect http://localhost/ABC/* to http://localhost/DEF/*
(i.e. from context ABC to context DEF)

Also I want to be able to redirect http://localhost/* to http://localhost/XYZ/*
(i.e. from an empty context to context XYZ)

[Nikos Georgosopoulos]

This filter is context specific, I believe you need to establish the ABC context, install the filter in there and the redirect everything to the other context. for the "Empty" context, it's the default context of your webserver and for Tomcat that resorts to ROOT.