From: Brian Candler <b.candler@...>
Date: 2009-10-27T23:56:01+09:00
Subject: Re: UnMarshal without source file

Manny Calavera wrote:
> My idea was:
...
> But something more STANDARD

Well, a Class itself is not marshalable, nor is the singleton class of 
an object.

If you want to save and restore the *definitions* of classes 
automatically, you'll have to do something very funky using ParseTree or 
the like.

Otherwise, I'd say your approach might be reasonable, but is rather 
dangerous and duplicates definitions of methods. How about this?

  module MyMarshal
    def dump(obj)
      Marshal.dump [$LOADED_FEATURES, Marshal.dump(obj)]
    end
    module_function :dump

    def load(str)
      requires, dump = Marshal.load(str)
      requires.each do |r|
        require r.sub(/\.rb\z/,'')
      end
      Marshal.load(dump)
    end
    module_function :load
  end

This depends on your class definitions being available in source files 
which are loaded using 'require'. It has obvious downsides, but 
something like this might work for you.

It really depends on what your application is trying to do. Why are you 
loading objects which are not defined in the context of the loading 
application? How would you know what methods to call on those objects?

Regards,

Brian.
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