SQL & PL/SQL :: Read All Files In Directory On Client's Machine

I want to read all the files present in a directory of client's machine.

However I have achieved this by creating java class in database but the problem is it accesses the directory of machine on which database is installed not the client's machine.

I have oracle client and I tried to access local directory of client's machine to read all the files in that directory but it didn't work.

However, I achieved this by creating one java class for ex. test.class and I run it locally through command prompt but I want to achieve it using Pl-sql.