You don't need that - Clojure maps *are* Java maps (they implement
java.util.Map) and you can pass them into most Java APIs as is (with the
caveat that they are made for reading, not for writing).
If you did really want to convert them to hash-maps or whatever, it's
pretty easy to do so with a clojure.walk/postwalk-replace.
On Friday, January 31, 2020 at 3:07:24 PM UTC-6, Jason Ross wrote:
>
> Hey I know this is super old post but what would the reverse look like,
> eg. recursively convert Clojure to java map
>
> On Saturday, October 15, 2011 at 4:10:32 AM UTC-5, Baishampayan Ghose
> wrote:
>>
>> > I have a Java Map contains Map of Maps/List (JSON like map) and have
>> > to convert to Clojure map (This happens at Java - Clojure Interop), So
>> > I have written a converter function 'as-clj-map' by modifying the
>> > clojure walk functions, It works fine, but consume lot of cpu when the
>> > data structure is quit big. Any suggestions to improve this code?
>>
>> What about using protocols for this job?
>>
>> (defprotocol ConvertibleToClojure
>> (->clj [o]))
>>
>> (extend-protocol ConvertibleToClojure
>> java.util.Map
>> (->clj [o] (let [entries (.entrySet o)]
>> (reduce (fn [m [^String k v]]
>> (assoc m (keyword k) (->clj v)))
>> {} entries)))
>>
>> java.util.List
>> (->clj [o] (vec (map ->clj o)))
>>
>> java.lang.Object
>> (->clj [o] o)
>>
>> nil
>> (->clj [_] nil))
>>
>> (defn as-clj-map
>> [m]
>> (->clj m))
>>
>>
>> Let me know if this works for you & meets your performance requirements.
>>
>> Regards,
>> BG
>>
>> --
>> Baishampayan Ghose
>> b.ghose at gmail.com
>>
>>
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