Quantcast

very deep copy of MagmaCollection

Previous Topic Next Topic
 
classic Classic list List threaded Threaded
2 messages Options
Reply | Threaded
Open this post in threaded view
|  
Report Content as Inappropriate

very deep copy of MagmaCollection

mmimica
Hello!

Aiming to complete transparency, it would be really nice if one could send #veryDeepCopy to an instance of MagmaCollection (or some object containing it) and get a fresh new MagmaCollection with all the elements deeply copied to it. By default it won't work because 'session' instance variable must not be deeply copied.
As far I understand, one should override #veryDeepInner: and maybe #veryDeepFixupWith: to shallow-copy 'sessoin', and deep-copy everything else, and probably do something more to clear references to the collection begin copied.

I did try to do it, but the semantics of Pharo deep-copy are just too confusing for me. I keep getting "unknown OID" error from magma server.

I must be doing something wrong.
Any advices, or code? :)


--
Milan Mimica
http://sparklet.sf.net

_______________________________________________
Magma mailing list
[hidden email]
http://lists.squeakfoundation.org/mailman/listinfo/magma
Reply | Threaded
Open this post in threaded view
|  
Report Content as Inappropriate

Re: very deep copy of MagmaCollection

Chris Muller-3
Without knowing the context of what you want to do, I would suggest
just overriding veryDeepCopy on MagmaCollection to say something like:

  veryDeepCopy
      | mc |
      mc := MagmaCollection new.
      self do: [ : each | mc add: each veryDeepCopy ].
      ^ mc

If any of the elements reference back to the receiver collection then
another solution would be needed.

But MagmaCollections are typically used in situations where they would
have a lot of elements, and veryDeepCopy would require a full
enumeration, which means it would not perform well.  If it does not
have a lot of elements then a standard Smalltalk collection
could/should be used.  So, I am curious why you want to veryDeepCopy a
MagmaCollection..

 - Chris


On Sat, Jan 7, 2012 at 7:47 AM, Milan Mimica <[hidden email]> wrote:

> Hello!
>
> Aiming to complete transparency, it would be really nice if one could send
> #veryDeepCopy to an instance of MagmaCollection (or some object containing
> it) and get a fresh new MagmaCollection with all the elements deeply copied
> to it. By default it won't work because 'session' instance variable must not
> be deeply copied.
> As far I understand, one should override #veryDeepInner: and maybe
> #veryDeepFixupWith: to shallow-copy 'sessoin', and deep-copy everything
> else, and probably do something more to clear references to the collection
> begin copied.
>
> I did try to do it, but the semantics of Pharo deep-copy are just too
> confusing for me. I keep getting "unknown OID" error from magma server.
>
> I must be doing something wrong.
> Any advices, or code? :)
>
>
> --
> Milan Mimica
> http://sparklet.sf.net
>
> _______________________________________________
> Magma mailing list
> [hidden email]
> http://lists.squeakfoundation.org/mailman/listinfo/magma
>
_______________________________________________
Magma mailing list
[hidden email]
http://lists.squeakfoundation.org/mailman/listinfo/magma
Loading...