[Pharo-dev] In-memory FileSystem write streams not being polymorphic

Nicolas Cellier nicolas.cellier.aka.nice at gmail.com
Tue Nov 12 08:31:26 EST 2013

It's just a matter of selecting a strategy. I've proposed two:
A) create a wrapper class for legacy Stream compatibility selectors
B) create extensions for Legacy Stream compatibility selectors
My preference goes to A)

The legacy support MUST be minimal (next nextPut: nextPutAll: peek upTo:
...), otherwise we will import all the cruft in Xtream and would go back to
our starting point...
Once the minimal support written (a few hours should be enough), we should
gradually switch each every legacy Stream usage -> Xtream.

An area which require more work is those Streams that have mixed
conventions (one portion is interpreted as text, another as binary).
In theory that's easy, we just have two streams and they both wrap on a low
level binary stream, but that means we have to be very cautious with
buffers and caches.

Another area of work is usage of ugly selectors like name (we try to access
the file name from the Stream API, arghh). Those usages are bad and require
a rewrite.

2013/11/12 Stéphane Ducasse <stephane.ducasse at inria.fr>

> or of course, you start looking at porting XStreams to pharo ;), which on
> the long run will
> solve many more problems. The current situation is not that satisfactory
> having experience with it and thinking about a plan for the beginning of
> 40 would be great.
> I know that nicolas ported XTream to pharo/squeak. Now understanding how
> integrate it would be nice.
> Stef
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