title: Vaadin: display a list in table
body: <p>I have the need to display all values contained in a list in a table.</p>
  
  <p>For example:</p>
  
  <pre><code>class Person {
      String name;
      String age;
      List&lt;Rule&gt; rules;
  }
  </code></pre>
  
  <p>the result that I expect:</p>
  
  <pre><code>|name    |age     |rules
   alex     22       administrator, user, etc..
  </code></pre>
  
  <p>where administrator and user belong to Rule.name property</p>
  
  <p>Does anyone know how to do that?</p>