public abstract class Entity {
   @IndexedEmbedded
   private EntitySummary entitySummary;
}

public class EntitySummary {
   @IndexedEmbedded
   private EntityState state;
   @ContainedIn
   private Entity entity;
}

@Indexed(index = "Item")
public class IndexedItem extends Entity {
}

//Please note that this class is not indexed.
public class NonIndexedItem extends Entity {
}