AsynchronousFileChannel end of file

[Tim Fox]

Hello,

It's not clear to me how to tell if I have read to end of file using 
AsynchronousFileChannel.read().

The javadoc mentions that if -1 is returned as number of bytes read than 
that means the position was >= file size at time of read.

However, if the read returns less bytes read than the limit of the 
ByteBuffer passed in, does that also signify end of file was reached, or 
is it sometimes possible to get partial reads that don't fill the buffer 
even though there is more data in the file to read?

In other words, do I always have to issue reads until I received bytes 
read == -1?

Thanks again.