title: GAE datastore (save object)
body: <p>I am new at GAE Api.</p>
  
  <p>At the moment I use  : <strong>com.google.appengine.api.datastore.DatastoreService</strong> in order to save something in database.</p>
  
  <p>At the moment I need to save list of items in database. should I use JDO ? Or can I do this without it? :-)</p>
  
  <p>I need to save Array in datastore. but I can't do something like that:</p>
  
  <pre><code>entity = new Entity(key);
  entity.setProperty("uid", arrayObject);
  </code></pre>