From b1471ba87f299347e78a9e91b002df2971fd93b1 Mon Sep 17 00:00:00 2001
From: Chris Nuernberger <chris@techascent.com>
Date: Wed, 30 Sep 2020 11:06:44 -0600
Subject: [PATCH] Fixes #128 - robust serialization for java.time.Instant

---
 src/taoensso/nippy/java_time.clj   | 23 +++++++++++++++++++++++
 test/taoensso/nippy/tests/main.clj |  7 +++++++
 2 files changed, 30 insertions(+)
 create mode 100644 src/taoensso/nippy/java_time.clj

diff --git a/src/taoensso/nippy/java_time.clj b/src/taoensso/nippy/java_time.clj
new file mode 100644
index 0000000..c07b4f6
--- /dev/null
+++ b/src/taoensso/nippy/java_time.clj
@@ -0,0 +1,23 @@
+(ns taoensso.nippy.java-time
+  (:require [taoensso.nippy :as nippy])
+  (:import [java.time Instant]))
+
+
+(nippy/extend-freeze
+ Instant :java.time/instant
+ [^Instant instant out]
+ (nippy/-freeze-without-meta! [(.getEpochSecond instant)
+                               (long (.getNano instant))] out))
+
+
+(nippy/extend-thaw
+ :java.time/instant
+ [in]
+ (let [[seconds nanos] (nippy/thaw-from-in! in)]
+   (Instant/ofEpochSecond seconds nanos)))
+
+
+(comment
+  (let [inst (Instant/now)]
+    (= inst (nippy/thaw (nippy/freeze inst))))
+  )
diff --git a/test/taoensso/nippy/tests/main.clj b/test/taoensso/nippy/tests/main.clj
index 7ac88ba..89be9b0 100644
--- a/test/taoensso/nippy/tests/main.clj
+++ b/test/taoensso/nippy/tests/main.clj
@@ -6,6 +6,8 @@
    [clojure.test.check.properties :as tc-props]
    [taoensso.encore :as enc   :refer ()]
    [taoensso.nippy  :as nippy :refer (freeze thaw)]
+   ;;java-time support for nippy
+   [taoensso.nippy.java-time]
    [taoensso.nippy.benchmarks :as benchmarks]))
 
 (comment (test/run-tests))
@@ -333,6 +335,11 @@
 
     "Metadata successfully excluded by freeze"))
 
+
+(deftest java-time-extension-test
+  (let [inst (java.time.Instant/now)]
+    (is (= inst (nippy/thaw (nippy/freeze inst))))))
+
 ;;;; Benchmarks
 
 (deftest _benchmarks