From bc9c5cf1a5c5ddb8cc23179922fc8af981deb099 Mon Sep 17 00:00:00 2001
From: Graeme Rocher <graeme.rocher@oracle.com>
Date: Mon, 7 Nov 2022 15:53:53 +0100
Subject: [PATCH] Serialize LocalDateTime to string always. Fixes #284 (#311)

* Serialize LocalDateTime to string always. Fixes #284
---
 .../serde/support/serdes/LocalDateTimeSerde.java | 10 ++--------
 .../serde/AbstractBasicSerdeCompileSpec.groovy   | 16 +++++++++-------
 2 files changed, 11 insertions(+), 15 deletions(-)

diff --git a/serde-support/src/main/java/io/micronaut/serde/support/serdes/LocalDateTimeSerde.java b/serde-support/src/main/java/io/micronaut/serde/support/serdes/LocalDateTimeSerde.java
index 82a2bab7e..e04d248b8 100644
--- a/serde-support/src/main/java/io/micronaut/serde/support/serdes/LocalDateTimeSerde.java
+++ b/serde-support/src/main/java/io/micronaut/serde/support/serdes/LocalDateTimeSerde.java
@@ -16,10 +16,7 @@
 package io.micronaut.serde.support.serdes;
 
 import java.io.IOException;
-import java.time.Instant;
 import java.time.LocalDateTime;
-import java.time.ZoneId;
-import java.time.ZoneOffset;
 import java.time.format.DateTimeFormatter;
 import java.time.temporal.TemporalQuery;
 
@@ -54,14 +51,11 @@ public TemporalQuery<LocalDateTime> query() {
 
     @Override
     protected void serializeWithoutFormat(Encoder encoder, EncoderContext context, LocalDateTime value, Argument<? extends LocalDateTime> type) throws IOException {
-        encoder.encodeLong(value.toInstant(ZoneOffset.UTC).toEpochMilli());
+        encoder.encodeString(getDefaultFormatter().format(value));
     }
 
     @Override
     protected LocalDateTime deserializeNonNullWithoutFormat(Decoder decoder, DecoderContext decoderContext, Argument<? super LocalDateTime> type) throws IOException {
-        return LocalDateTime.ofInstant(
-                Instant.ofEpochMilli(decoder.decodeLong()),
-                ZoneId.from(ZoneOffset.UTC)
-        );
+        return getDefaultFormatter().parse(decoder.decodeString(), LocalDateTime::from);
     }
 }
diff --git a/serde-tck/src/main/groovy/io/micronaut/serde/AbstractBasicSerdeCompileSpec.groovy b/serde-tck/src/main/groovy/io/micronaut/serde/AbstractBasicSerdeCompileSpec.groovy
index 688a79e46..5748e1ff6 100644
--- a/serde-tck/src/main/groovy/io/micronaut/serde/AbstractBasicSerdeCompileSpec.groovy
+++ b/serde-tck/src/main/groovy/io/micronaut/serde/AbstractBasicSerdeCompileSpec.groovy
@@ -45,7 +45,7 @@ class Test {
     private $type.name value;
     public void setValue($type.name value) {
         this.value = value;
-    } 
+    }
     public $type.name getValue() {
         return value;
     }
@@ -106,7 +106,7 @@ class Test {
     private $type value;
     public void setValue($type value) {
         this.value = value;
-    } 
+    }
     public $type getValue() {
         return value;
     }
@@ -141,7 +141,7 @@ class Test {
     private $type.name value;
     public void setValue($type.name value) {
         this.value = value;
-    } 
+    }
     public $type.name getValue() {
         return value;
     }
@@ -185,7 +185,7 @@ class Test {
     private $type.componentType.name[] value;
     public void setValue($type.componentType.name[] value) {
         this.value = value;
-    } 
+    }
     public $type.componentType.name[] getValue() {
         return value;
     }
@@ -245,7 +245,7 @@ class Test {
     private $type.componentType.name[] value;
     public void setValue($type.componentType.name[] value) {
         this.value = value;
-    } 
+    }
     public $type.componentType.name[] getValue() {
         return value;
     }
@@ -287,7 +287,7 @@ class Test {
     private $type value;
     public void setValue($type value) {
         this.value = value;
-    } 
+    }
     public $type getValue() {
         return value;
     }
@@ -334,7 +334,7 @@ class Test {
     private $type.name value;
     public void setValue($type.name value) {
         this.value = value;
-    } 
+    }
     public $type.name getValue() {
         return value;
     }
@@ -355,6 +355,8 @@ class Test {
         Instant       | Instant.now()          | { Instant i -> i.toEpochMilli() }
         LocalTime     | LocalTime.now()        | { LocalTime i -> i.toSecondOfDay() }
         LocalDate     | LocalDate.now()        | { LocalDate d -> d }
+        LocalDateTime | LocalDateTime.MAX      | { LocalDateTime i -> LocalDateTime.MAX }
+        LocalDateTime | LocalDateTime.MIN      | { LocalDateTime i -> LocalDateTime.MIN }
         LocalDateTime | LocalDateTime.now()    | { LocalDateTime i -> i.toInstant(ZoneOffset.from(ZoneOffset.UTC)).toEpochMilli() }
         ZonedDateTime | ZonedDateTime.now()    | { ZonedDateTime i -> i.toInstant().toEpochMilli() }
         Duration      | Duration.ofSeconds(10) | { Duration d -> d.toSeconds() }