Add a fast serialization for Date objects

src/taoensso/nippy.clj

@@ -11,6 +11,7 @@
   (:import  [java.io DataInputStream DataOutputStream ByteArrayOutputStream
              ByteArrayInputStream]
             [java.lang.reflect Method]
+            [java.util Date]
             [clojure.lang Keyword BigInt Ratio PersistentQueue PersistentTreeMap
              PersistentTreeSet IPersistentList IPersistentVector IPersistentMap
              IPersistentSet IPersistentCollection IRecord]))
@@ -66,6 +67,8 @@
 
 (def ^:const id-record     (int 80))
 
+(def ^:const id-date       (int 90))
+
 ;;; DEPRECATED (old types will be supported only for thawing)
 (def ^:const id-old-reader  (int 1))  ; as of 0.9.2, for +64k support
 (def ^:const id-old-string  (int 11)) ; as of 0.9.2, for +64k support
@@ -173,6 +176,8 @@
          (write-biginteger s (.numerator   x))
          (write-biginteger s (.denominator x)))
 
+(freezer Date id-date (.writeLong s (.getTime x)))
+
 (def ^:private head-meta-id (reduce-kv #(assoc %1 %3 %2) {} head-meta))
 
 (defn- wrap-header [data-ba metadata]
@@ -276,6 +281,8 @@
            method   ^Method (.getMethod class "create" meth-sig)]
        (.invoke method class (into-array Object [(thaw-from-stream s)])))
 
+     id-date  (Date. (.readLong s))
+
      ;;; DEPRECATED
      id-old-reader (edn/read-string (.readUTF s))
      id-old-string (.readUTF s)