Tanya,

That did help, swapping  ie4clj.api.Inferrable for its import.
That, of course, got me into the next coding bug, about which I shall ask
next (I am attempting to use doseq to walk a list and AND its Inferrable
members)

Meanwhile, I am truly surprised that you said

I don't think it is the right way to use interfaces in clojure.
>
It's likely a result of dyslexia that I did not see that coming after
studying all the online banter about interfaces and protocols.. I chose
definterface because the examples showed how to specify the return values,
and programming by interface is how I do Java. I'd like to discover what,
precisely, to read and get past dyslexic events to learn how to use
interfaces.

Many thanks
Jack

On Sat, Jul 17, 2021 at 4:10 PM Tanya Moldovan <tanya.moldo...@gmail.com>
wrote:

> Hi,
>
> I don't think it is the right way to use interfaces in clojure. Take a
> look at  this
> <https://medium.com/@ujjawaldixit099/implementing-java-interfaces-in-clojure-3e5f0b80ba14>
>  and this
> <https://stackoverflow.com/questions/8614734/how-do-i-implement-a-java-interface-in-clojure/8615002>
> .
> You could create a java project with the interfaces you need and import
> that instead.
>
> I think the issue is that this setup requires AOT and it might be missing
> from your configuration.
> To fix it try adding this to project.clj file:
>
> :profiles {:dev {:aot [ie4clj.api]}}
>
> It can be tricky If you want to do lein uberjar and generate a jar file.
>
> Alternatively, you can use compile-files
> <https://clojuredocs.org/clojure.core/*compile-files*> (then you don't
> need import statement).
> (note that in your gist you had some errors when defining AndList, I've
> fixed it)
> (also take a look at the clojure style guide
> <https://github.com/bbatsov/clojure-style-guide>, as AndList is not
> really the way to name things in clojure )) )
>
> (ns ie4clj.api)
>
> (definterface Inferrable
>   (^boolean eval [])
>   (^boolean evalMembers [members]))
>
> (ns ie4clj.AndList)
>
> (when *compile-files*
>   (require 'ie4clj.api))
>
> (def AndList
>   (reify
>    ie4clj.api.Inferrable
>    (eval [_] true)
>    (evalMembers [_ m] true)))
>
> Hope this helps,
>
>
>
> On Sat, 17 Jul 2021 at 21:06, Jack Park <jackp...@topicquests.org> wrote:
>
>> I created a gist
>> https://gist.github.com/KnowledgeGarden/39742ae9ae641f0d8facb31b288ece4c
>>
>> which explains a ClassNotFoundException when I am importing and reifying
>> a particular interface in another clj file.
>>
>> It's really baffling because, in the load order, core calls a test in a
>> test file - getting that to compile landed on the solution of an (:import
>> ...) statement; once that worked, then the code in that test calls another
>> file AndList.clj which happens to have several places where it reifies the
>> same interface. Except, with the same import statement, on that file, I get
>> the error.  Difficult to even find a decent StackOverflow because one such
>> StackOverflow appears to be very similar, and the suggested fix is what I
>> have now.
>>
>> Thanks in advance for ideas.
>> Jack
>>
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