Regarding the processing of a file based on the date present in file name dynamically

Hi Experts,

               i had a requirement where i am getting flat files from ftp server and need to send to the SAP system with out ESR Objects. here i need to pick the files based upon the date present in the file name.Action.20150302.0101.txt  for eg if i had run the pi interface on that particular day which is 20150302 this file should only be processed. similarly the files of that particular day should be processed when pi runs.please let me know

Thanks

Giridhar