Assign a unique name to the prototype object. Serialize instances as
map and put the reference to the prototype object under one of their
keys. Something like
{:prototype-components {:r10k {:resistance 10, :type :fixed, :unit :kΩ}}
:components [{:name "resistor 1", :proto :r10k}, {:name "resistor 2",
:proto :r10k}]}
Jozef
On Sun, Aug 10, 2014 at 8:36 PM, MS <[email protected]> wrote:
> I'm trying to write an EE schematic capture program in clojure. I'd like to
> be able to define a prototype component, say a resistor with value=10k, then
> be able to instantiate that many times, with each instance having an
> additional property such as a name string. It's easy to ensure (identical?
> (proto instance1) (proto instance2)) returns true while in-memory, however
> I'm not sure how to write this out to disk.
>
> It seems the serialization libraries, print-dup, edn, etc., operate on
> values, so reading the database back in won't guarantee it's really the same
> object. I'd like to have the thing defined *once* then instantiated many
> times, and have this captured in the on-disk version.
>
> Am I barking up the wrong tree? ie, given immutable data structures,
> there's kind of no point in doing this. I'm actually trying to save disk
> space, so I'd like to be able to refer in a few characters a potentially
> large structure that was defined earlier. It would also be nice to have
> this be human readable.
>
> Would one of the JSON serializers do this for me?
>
>
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