themeSwitcher set the a theme like default

[Dura Hurtado]

Hi I am trying to set in a themeSwitcher, one theme which I prefer to use then in another machine, or in another session type the URL´s app and
visualize it with the theme I decided last time.

I have done it with .css saving the .css name in a DDBB and retrieving the value througth a backbean, but in the themeSwitcher´s case it´s different.

I don´t know what way could I set a theme between sessions.

¿Any idea?

Thanks