title: Get Object from reference Id
body: <p>is it possible to get an object from his reference id?</p>
  
  <p>i get a list of String containing the reference id of an object like:</p>
  
  <blockquote>
    <p>com.test.test.business.model.Gamma@20</p>
  </blockquote>
  
  <p>how to get the object from this reference id?</p>
  
  <p>it's only a string and it isn't castable to the object itself</p>