Clojure(Script) tagged literals for jsr-310 (java-time) entities
Switch branches/tags
Nothing to show
Clone or download
Fetching latest commit…
Cannot retrieve the latest commit at this time.
Type Name Latest commit message Commit time
Failed to load latest commit information.


A Clojure(Script) library to help reading and printing objects from jsr-310, which on the jvm is implemented in the java.time library and in Javascript as the 'JSJoda' library (which is actually an implementation of JSR-310, rather than joda-time, as it's name would suggest).

For Clojurists using jsr-310, take a look at the cross-platform tick (v 0.4+) library


If you only need Instant from jsr-310, you could just rebind the tag readers and printer fns for #inst

Also java-time-literals is a library which is similar but currently only works on the jvm, and also doesn't provide a way to read edn with the literals (via clojure.edn/read-string or cljs.reader). Also the naming of tags in this library follows the tick (v 0.4+) convention, for example #jsr310/date for LocalDate, instead of #time/ld.



[jsr310-tagged-literals "0.1.1"]

The library includes the magic file data_readers.cljc which Clojure and the Clojurescript compiler will look for.

Example literals:

#jsr310/month "JUNE"
#jsr310/period "P1D"
#jsr310/date "2039-01-01"
#jsr310/date-time "2018-07-25T08:08:44.026"
#jsr310/zoned-date-time "2018-07-25T08:09:11.227+01:00[Europe/London]"
#jsr310/offset-date-time "2018-07-25T08:11:54.453+01:00"
#jsr310/instant "2018-07-25T07:10:05.861Z"
#jsr310/time "08:12:13.366"
#jsr310/duration "PT1S"
#jsr310/year "3030"
#jsr310/year-month "3030-01"
#jsr310/zone "Europe/London"
#jsr310/day-of-week "TUESDAY"


For example, in a Clojure repl:

(require '
; Get a node repl going, or equivalent start figwheel and connect with sidecar etc 
(require '[cljs.repl :as cljs-repl])
(require '[cljs.repl.node :as node])          

(cljs-repl/repl* (node/repl-env)
  {:output-dir "out"
   :optimizations :none
   :cache-analysis true
   :source-map true})
 ;Now, in cljs repl
 (require '[java.time ])  
 (println #jsr310/duration "PT1S")
 ; => #object[Duration PT1S]
 ; Now, include printing and edn reading
 (require '[])
 (println #jsr310/duration "PT1S")
 ; => #jsr310/duration "PT1S"   
 Read an edn string:
 (cljs.reader/read-string "#jsr310/date \"2011-01-01\"")     

Self-hosted Cljs



As with any non-core tagged literal, the tag reader functions referred to from a data_readers file must be loaded before the forms can be read.

(require '[])
(println #jsr310/duration "PT1S")

Reading and Writing edn

(require '[])

Printing will now automatically change, for example re run the println above

Read edn like this:

(clojure.edn/read-string {:readers} "#jsr310/date \"2011-01-01\"")

Using clojure.core/read-string, you'd need to eval after the call to read-string


Copyright © 2018 Widd Industries

Distributed under the Eclipse Public License either version 1.0 or (at your option) any later version.