Hi -

I'm trying to write a file with a description/header at the front.
The header can't be calculated until all the bytes are written.

So far, I write a dummy header just to consume the space.  Then
I write the actual file.  I'm stuck on how to backup the file
pointer to the beginning to write the actual header.

What's worse is that by the time I'm writing, I'm inside a
FilterOutputStream object.  So I don't have access to the
original file.

Any ideas?

Thanks!