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edn_encoder.clj
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edn_encoder.clj
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(ns org.purefn.lebowski.encoder.edn-encoder
"Converts between Clojure values stored as EDN encoded strings using the
Couchbase StringDocument type."
(:require [clojure.spec.alpha :as s]
[clojure.edn :as edn]
[org.purefn.bridges.api :as api]
[org.purefn.lebowski.encoder.api :as enc]
[org.purefn.lebowski.encoder.protocol :as proto])
(:import [com.couchbase.client.java.document StringDocument]))
;;------------------------------------------------------------------------------
;; Component.
;;------------------------------------------------------------------------------
(defrecord EdnEncoder []
proto/CheckAndSetEncoder
(named [_ id]
(StringDocument/create id))
(versioned [_ id cas]
(StringDocument/create ^String id nil ^Long cas))
(encode [_ id value]
(StringDocument/create id (pr-str value)))
(encode-versioned [_ id value cas]
(StringDocument/create ^String id (pr-str value) ^Long cas))
(decode [_ document]
{::api/value (some-> ^StringDocument document
(.content)
(.toString)
(edn/read-string))
::api/cas (some-> ^StringDocument document
(.cas))}))
;;------------------------------------------------------------------------------
;; Creation
;;------------------------------------------------------------------------------
(defn edn-encoder
"Create an EdnEncoder."
[]
(->EdnEncoder))
;;------------------------------------------------------------------------------
;; Creation Spec
;;------------------------------------------------------------------------------
(s/fdef edn-encoder
:ret enc/encoder?)