title: Querying a Map using JPA 2.0 criteria
body: <p>I'm looking for JPA 2 criteria equivalent of this JPQL query :</p>
  
  <pre class="lang-sql prettyprint-override"><code>select e from Entity e join e.myMap m where KEY(m) = 'myKey' and VALUE(m) = ‘myValue’ 
  </code></pre>
  
  <p>Thank you !</p>