ElasticSearch Date datatype

Elastic Stack Elasticsearch
1

Hi to all,

I am using Hibernate.4.0.1.Final. My Entity class have five fields,

         1. employeeId   - Long
         2. empName     - String
         3. empMobile    - Long
         4. empAddress  - String
         5. empDOB       - <b>Date</b>

But my Elasticsearch field data types,

         1. employeeId   - Long
         2. empName     - String
         3. empMobile    - Long
         4. empAddress  - String
         5. empDOB       -<b> Long</b>

Instead of empDOB datatype Long to Date.
How Can I solve this One?

When am creating index using Java code... like

client.prepareIndex("indexName","type",id"+count).setSource(employee.getBytes()).execute().actionGet();

Here, how to mention datatype like entity class? Any one help me....