File Adapter Module - Help

Hi

For a file adapter I had enabled the option <b>Archieve File</b> in my communication channel. So the system will put the file in the archieve folder after it is read. My requirement is to check if the file already exits in the archieve folder or not. Any means of checking it? or shud i make use of adapter modules? If yes kindly point some helpful tips on the same.

Kindly fwd any useful doc to mailprabhu@gmail.com

regds

prabhu