Call internal text editor

Hey folks,
I'm looking for a way to call the built in text editor to edit and save a file loaded in my mxj object. So far I couldn't find anything in the API but I know that it's possible in C externals. Any ideas?
So far I'm using the java Desktop Class to open the standard text editor but I'm struggling finding a way to automatically reload the file by saving/closing the text editor. If anyone knows a solution for that I'd be very happy as well.

I think I could build something using apaches commons.io FileMonitor but I'm not a big fan of these file monitoring solutions.

best
Dominik

P.S. To avoid confusion: I'm not trying to open the java editor to edit the source code but a text file located somewhere.