From 1e65b8ad5967d41dc56d7dce015f4bb6c1af26dd Mon Sep 17 00:00:00 2001
From: Hao Huang <hhuang@driver.xyz>
Date: Fri, 10 Feb 2017 16:17:01 -0800
Subject: Add the companion ordering object for Date

---
 src/main/scala/xyz/driver/core/date.scala | 10 ++++++++++
 1 file changed, 10 insertions(+)

(limited to 'src/main/scala/xyz/driver/core/date.scala')

diff --git a/src/main/scala/xyz/driver/core/date.scala b/src/main/scala/xyz/driver/core/date.scala
index bb88501..f0b9bf6 100644
--- a/src/main/scala/xyz/driver/core/date.scala
+++ b/src/main/scala/xyz/driver/core/date.scala
@@ -26,6 +26,16 @@ object date {
   }
 
   object Date {
+    implicit def dateOrdering: Ordering[Date] = Ordering.fromLessThan { (date1, date2) =>
+      if (date1.year != date2.year) {
+        date1.year < date2.year
+      } else if (date1.month != date2.month) {
+        date1.month < date2.month
+      } else {
+        date1.day < date2.day
+      }
+    }
+
     def fromString(dateString: String): Option[Date] = {
       util.Try(dateString.split("-").map(_.toInt)).toOption collect {
         case Array(year, month, day) if (1 to 12 contains month) && (1 to 31 contains day) =>
-- 
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