Re: [Pharo-project] Help "migrating" from classic streams to XStreams

And concerning nextNumber nextString etc... this supposes a certain format, we can't guess. If you have a DSL for your data with known grammar, you could try a PEG parser. Otherwise, if your data are in a classical Smalltalk format in ASCII, you could use Number readFrom: yourXTCompatibilityReadStream. Otherwise if you have a specific binary encoded data, it's up to you... Nicolas 2011/5/13 Nicolas Cellier <nicolas.cellier.aka.nice@gmail.com>:

Of course, another way is simply to define a *XTream-classic-API-compatibility in upper level XTReadStream, but that's less fun :)

Nicolas

2011/5/13 Nicolas Cellier <nicolas.cellier.aka.nice@gmail.com>:

...

Don't do it exclusively for file, but do it for every XTream One way to do it would be with a wrapper. I mean create a new subclass of XTReadStream, say XTCompatibilityReadStream  implement the compatibility methods you want. Same for WriteStream. You'll have to define a few XTream messages too that delegates to the source/destination

blah    ^source blah

foo    ^destination foo

Then define something like

XTReadStream>>classicalStreamAPI    ^XTCompatibilityReadStream on: self

My 2c.

Nicolas

2011/5/13 Mariano Martinez Peck <marianopeck@gmail.com>:

...

Hi guys. We are developing Fuel with Martin Dias. Fuel is a binary serializer similar to Parcels. More info in http://rmod.lille.inria.fr/web/pier/software/Fuel

For the moment, we are using the "classic" streams we want to give it a try to XStreams. My knowledge on streams is very little, so if someone can give me a hint I would really appreciate it. What I want to do right now is an adaptor of XStreams to classic stream. I mean, I want to create custom subclasses of XTFileWriteStream and XTFileReadStream that implements the same API from classic streams that we use in Fuel. And the implementations of such methods will do just a "self something" where something is the way of doing that in XStreams.

So, the following is the protocol we use in Fuel for streams, and what I would love to know is the associated way to do it it XStreams. The left is classic streams, and after the "->" it is XStreams:

Reading:

nextNumber: -> ?? nextPutAll: -> write: nextStringPut: -> ?? nextPut:  -> put: nextNumber:put: -> ?? nextWordPut: -> ??

Writing:

nextNumber: -> ?? next:  -> read: nextString -> ?? next  -> get nextWord -> ??

Thanks a lot in advance,

-- Mariano http://marianopeck.wordpress.com