I have not used it. I'm mentioning it because you mentioned unification and
prolog and because you basically want a two-way function, which is what was
touted as the ideal use-case for core.logic when it was heavily discussed
on this list a few months (years?) ago.

I'm not aware of the details of the performance tradeoffs, though. I
imagine it would be slower than writing both functions by hand, but I have
no idea how much.

On Monday, 13 July 2015, Jules <jules.gosn...@gmail.com> wrote:

> I haven't.
>
> Are you just suggesting it because I mentioned unification, or have you
> used it and know that it might be a good fit ?
>
> Thanks,
>
> Jules
>
> On Monday, 13 July 2015 10:37:55 UTC+1, Gary Verhaegen wrote:
>>
>> Have you already looked at core.logic?
>>
>> On Monday, 13 July 2015, craig worrall <craig....@transacumen.com> wrote:
>>
>>> You may have already discounted Java versions, but just in case  ...
>>> http://www.javacodegeeks.com/2013/10/java-object-to-object-mapper.html
>>>
>>> Craig
>>>
>>> On Monday, July 13, 2015 at 3:53:19 AM UTC+10, Jules wrote:
>>>>
>>>> Guys,
>>>>
>>>> I have an external and an internal data representation.
>>>>
>>>> I need to define transforms both ways.
>>>>
>>>> Both models are structured.
>>>>
>>>> A pair of in/out functions might look like:
>>>>
>>>> (fn [{{b :b c c:} :a}] [b [c]])
>>>>
>>>> (fn [[b [c]] {:a {:b b :c c}})
>>>>
>>>> I just typed that OTTOMH so please forgive any mistakes.
>>>>
>>>> I have about 50 of these to define and maintain and I may have further
>>>> representations to map to in the future.
>>>>
>>>> My question - Is there a library that will allow me to define the
>>>> relationship between the two representations declaratively and then
>>>> generate the transform functions from that single src.
>>>>
>>>> Ideally it would allow me to extend it to construct/destructure e.g.
>>>> joda-time class instances etc as some of my internal rep uses these.
>>>>
>>>> It feels a bit like unification in PROLOG...
>>>>
>>>> Looking forward to hearing your ideas.
>>>>
>>>> regards,
>>>>
>>>>
>>>> Jules
>>>>
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