feat: support des serializers/deserializers de type Instant

Author: Mcdostone

src/main/java/fr/maif/json/JsonRead.java

@@ -19,6 +19,7 @@
 
 import java.math.BigDecimal;
 import java.math.RoundingMode;
+import java.time.Instant;
 import java.time.LocalDate;
 import java.time.LocalDateTime;
 import java.time.format.DateTimeFormatter;
@@ -1395,6 +1396,23 @@ static JsonRead<LocalDate> _isoLocalDate() {
             return _localDate(DateTimeFormatter.ISO_LOCAL_DATE);
     }
 
+    /**
+     * Read a datetime at path with iso format
+     *
+     * <pre>{@code
+     * JsonRead<LocalDate> reader = _isoLocalDate();
+     * }</pre>
+     *
+     * @return the reader
+     */
+    static JsonRead<Instant> _instant() {
+        return JsonRead.ofRead(_string().flatMapResult(str ->
+                Try.of(() -> Instant.parse(str))
+                        .map(JsResult::success)
+                        .getOrElseGet(e -> JsResult.error(JsResult.Error.error("cannot.parse.into.instant")))
+        ), JsonSchema.dateTimeSchema());
+    }
+
     /**
      * Read a date at path
      *

src/main/java/fr/maif/json/JsonWrite.java

@@ -6,6 +6,7 @@
 
 import java.math.BigDecimal;
 import java.math.RoundingMode;
+import java.time.Instant;
 import java.time.LocalDate;
 import java.time.LocalDateTime;
 import java.time.format.DateTimeFormatter;
@@ -57,6 +58,24 @@ static <T> JsonWrite<T> auto() {
         return $localdate(DateTimeFormatter.ISO_LOCAL_DATE);
     }
 
+
+    /**
+     * Write a date to json in ISO
+     *
+     * @return the writer
+     */
+    static JsonWrite<Instant> $instant(DateTimeFormatter formatter) {
+        return instant -> new TextNode(formatter.format(instant));
+    }
+
+    /**
+     * Write an instant as  ISO-8601 instant format
+     * @return the writer
+     */
+    static JsonWrite<Instant> $instant() {
+        return $instant(DateTimeFormatter.ISO_INSTANT);
+    }
+
     /**
      * Write a date to json in ISO
      *

src/test/java/fr/maif/json/JsonReadTest.java

@@ -15,6 +15,7 @@
 import org.junit.jupiter.api.Test;
 
 import java.math.BigDecimal;
+import java.time.Instant;
 import java.time.LocalDate;
 import java.time.LocalDateTime;
 import java.time.format.DateTimeFormatter;
@@ -195,6 +196,21 @@ public void isoLocalDateTimeValid() {
         assertThat(localDateJsonRead.jsonSchema()).isEqualTo(JsonSchema.dateTimeSchema());
     }
 
+    @Test
+    public void instantValid() {
+        JsonRead<Instant> read = _instant();
+        var instant = Instant.ofEpochSecond(345544L);
+        JsResult<Instant> test = read.read(new TextNode(DateTimeFormatter.ISO_INSTANT.format(instant)));
+        assertThat(test).isEqualTo(JsResult.success(instant));
+        assertThat(read.jsonSchema()).isEqualTo(JsonSchema.dateTimeSchema());
+    }
+
+    @Test
+    public void instantInvalid() {
+        JsResult<Instant> test = _instant().read(new TextNode("c'est pas un boa ca ?"));
+        assertThat(test).isEqualTo(JsResult.error(JsResult.Error.error("cannot.parse.into.instant")));
+    }
+
     @Test
     public void dateTimeInvalid() {
         JsResult<LocalDateTime> test = _localDateTime(DateTimeFormatter.ISO_LOCAL_DATE).read(new TextNode("test"));

src/test/java/fr/maif/json/JsonWriteTest.java

@@ -8,6 +8,7 @@
 import org.junit.jupiter.api.Test;
 
 import java.math.BigDecimal;
+import java.time.Instant;
 import java.time.LocalDate;
 import java.time.LocalDateTime;
 import java.time.format.DateTimeFormatter;
@@ -95,6 +96,11 @@ public void writeNullList() {
         assertThat(write).isEqualTo(Json.newArray());
     }
 
+    @Test
+    public void writeInstant() {
+        JsonNode write = $instant().write(Instant.ofEpochMilli(3600123));
+        assertThat(write).isEqualTo(new TextNode("1970-01-01T01:00:00.123Z"));
+    }
 
     public enum TestEnum {
         test1