Cronjob running on a new file added

I need some guidance about the below issue: There are several files which uploaded to a specific folder daily. the time that the file can be added to folder is not specific and any time is possible! The file is encoded so the job which run, decode the file. Now I want to know is there any method for crontab to detect any time the file has been added to folder and run the job automatically, I don't want to specific a schedule time. because i am not sure about the time the file would be uploaded to folder.

Check out this post :
Tip: inotify cron

Regards
Peasant.