title: Returning value if it's 0
body: <p>i have following class</p>
  
  <pre><code>@JsonInclude(JsonInclude.Include.NON_DEFAULT)
  public class Order {
      private OrderId orderId;
      private int daysElapsed;
      private List&lt;Item&gt; items;
  }
  </code></pre>
  
  <p>Right now, if <code>daysElapsed</code> is <code>0</code> it is not included as part of response object. I want it to be there. Is there something provided by jackson which can handle this? </p>
  
  <p>I was thinking to use <code>Integer</code> class and use annotation <code>NON_NULL</code> to exclude it. Is there a better approach to do so?</p>