streaming redux

[jovo]

Daniel Gibson Wrote:
>  > Question: May we eliminate seekFromCurrent and  seekFromEnd and just
>  > have seek with absolute positioning? I don't know of streams that
>  > allow seek without allowing tell. Even if some stream doesn't, it's
>  > easy to add support for tell in a wrapper. The marginal cost of
>  > calling tell is small enough compared to the cost of  seek.
> 
> No, seekFromCurrent may be convenient e.g. in network streams (just skip 
> some bytes), where other seek operations don't make that much sense.
> 

Interfaces should abstract only common things. You can
always directly use concrete class that implements this.