Source parameter in Delimited text reader/writer

Hi,

I just would like to know if we can put something like a variable in the source parameter in the  "Delimited text reader/writer" components.

For the moment I have something like: \$(UserDir)/myFile240412.csv

and I would like it to be: '\$(UserDir)/myFile'.getDate().'csv'

Concretely I'd like today's date appearing in the file name

THanks for your help

florent