getSize() API of Source

[Rahul]

Hi Guys,

I am trying my existing Map-Reduce application on crunch. My current 
application is triggered from a custom server component. The server is 
capable of accepting data on open connection and it writes back the same 
on Sequential File before triggering the application. Now I have 
migrated the whole business logic parts on Crunch, I have also created a 
ReadableSource based on Sequential file that can read data in crunch. 
But I could not make out how to implement the getSize() API and return 
back 0 from there. The piece of code works but I wonder if it will break 
at some place ? How can I return back size of Sequential file ?

regards
Rahul