title: DynamoDb HashKey Attribute name
body: <p>Is there any way to get the attribute name of HashKey of a dynamodb table in java?</p>
  
  <pre><code>e.g., if the dyanmodb table schema is 
  (
   "HashKey, String", SSNId
   "SortKey, Long", Pincode
   "String", Name 
  )
  So I should be able to get the output like this:-
  getHashKeyAttributeName(String tableName) --&gt; SSNId
  getSortkeyAttributeName(String tableName) --&gt; Pincode
  getOtherAttributeList(String tableName) --&gt; Name
  </code></pre>