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Re: De-serializing an object with missing child classes

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On 06.09.2011 16:17, raphfrk@gmail.com wrote:
> On Sep 6, 1:34 pm, Robert Klemme<shortcut...@googlemail.com>  wrote:
>> http://download.oracle.com/javase/6/docs/api/java/io/Serializable.html
>
> Thanks for the info.  Is there a way to create a custom deserializer
> that can deserialize already serialized classes?

I am not sure I get exactly what you mean here.  Do you want to 
resurrect class objects (i.e. the code) from the stream?  I don't think 
this is possible without complex logic.

Or did you mean you want to write a custom deserializer after instances 
have been serialized?  It might be possible but you would have to know 
how the default serializer writes out data.  You may be able to find out 
by looking at how an array is serialized by default and then emulating 
that (IIRC first the length is written and then individual elements). 
You certainly need some experimenting to get this going.

Other than that there are some hints in docs about schema change and how 
to deal with that (only it's not called "schema change" but they are 
talking about class versions).  The java.sun.com had some tutorials but 
I don't have any links handy.

Kind regards

	robert

-- 
remember.guy do |as, often| as.you_can - without end
http://blog.rubybestpractices.com/

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De-serializing an object with missing child classes "raphfrk@gmail.com" <raphfrk@gmail.com> - 2011-09-06 05:15 -0700
  Re: De-serializing an object with missing child classes Robert Klemme <shortcutter@googlemail.com> - 2011-09-06 05:34 -0700
    Re: De-serializing an object with missing child classes "raphfrk@gmail.com" <raphfrk@gmail.com> - 2011-09-06 07:17 -0700
      Re: De-serializing an object with missing child classes Robert Klemme <shortcutter@googlemail.com> - 2011-09-07 07:46 +0200
        Re: De-serializing an object with missing child classes Andreas Leitgeb <avl@gamma.logic.tuwien.ac.at> - 2011-09-07 11:45 +0000
          Re: De-serializing an object with missing child classes "raphfrk@gmail.com" <raphfrk@gmail.com> - 2011-09-07 07:17 -0700
        Re: De-serializing an object with missing child classes "raphfrk@gmail.com" <raphfrk@gmail.com> - 2011-09-07 07:14 -0700
  Re: De-serializing an object with missing child classes Roedy Green <see_website@mindprod.com.invalid> - 2011-09-06 06:04 -0700
  Re: De-serializing an object with missing child classes Roedy Green <see_website@mindprod.com.invalid> - 2011-09-06 11:59 -0700
    Re: De-serializing an object with missing child classes Arne Vajhøj <arne@vajhoej.dk> - 2011-09-06 19:51 -0400
      Re: De-serializing an object with missing child classes markspace <-@.> - 2011-09-06 17:53 -0700
  Re: De-serializing an object with missing child classes Arne Vajhøj <arne@vajhoej.dk> - 2011-09-06 19:53 -0400

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