Fixed setting item values of timestamp properties

Author: OndraFiedler

pom.xml

@@ -6,7 +6,7 @@
 
     <groupId>com.recombee</groupId>
     <artifactId>api-client</artifactId>
-    <version>1.2.4</version>
+    <version>1.2.4.1</version>
     <name>Recombee API Client</name>
     <description>A client library for easy use of the Recombee recommendation API</description>
     <url>http://recombee.com</url>
@@ -29,7 +29,7 @@
         <developer>
             <id>ondra_fiedler</id>
             <name>Ondrej Fiedler</name>
-            <email>ondrj.fiedler@recombee.com</email>
+            <email>ondrej.fiedler@recombee.com</email>
             <url>https://github.com/OndraFiedler</url>
             <organization>Recombee</organization>
             <organizationUrl>http://recombee.com</organizationUrl>

src/main/java/com/recombee/api_client/RecombeeClient.java

@@ -3,6 +3,8 @@
 import com.fasterxml.jackson.core.JsonProcessingException;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import com.fasterxml.jackson.core.type.TypeReference;
+import java.text.SimpleDateFormat;
+
 import com.mashape.unirest.http.HttpResponse;
 import com.mashape.unirest.http.Unirest;
 import com.mashape.unirest.http.exceptions.UnirestException;
@@ -73,6 +75,8 @@ public RecombeeClient(String databaseId, String token) {
         this.databaseId = databaseId;
         this.token = token;
         this.mapper = new ObjectMapper();
+        SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss'Z'");
+        this.mapper.setDateFormat(df);
 
         if (System.getenv("RAPI_URI") != null)
             this.baseUri = System.getenv("RAPI_URI");
@@ -605,7 +609,7 @@ private HttpRequest delete(String url) {
 
     private HttpRequest post(String url, Request req) {
         try {
-            String json = new ObjectMapper().writeValueAsString(req.getBodyParameters());
+            String json = this.mapper.writeValueAsString(req.getBodyParameters());
             return Unirest.post(url).header("Content-Type", "application/json").
                     body(json.getBytes()).getHttpRequest();
         } catch (JsonProcessingException e) {