title: Grails GORM date databinding
body: <p>I am using Grails 2.3 and I have a domain with a date field:</p>
  
  <pre><code>class DomainClass {
      String title
      Date datetime
  } 
  </code></pre>
  
  <p>And I have a json coming in to the RestfulController with timestamp in milliseconds:</p>
  
  <pre><code>{"title": "name", "datetime": 957044075522}
  </code></pre>
  
  <p>The controller is binding the title correctly but for the datetime field, it is actually an error:</p>
  
  <pre><code>Could not find matching constructor for: java.util.Date(com.google.gson.internal.LazilyParsedNumber)
  </code></pre>
  
  <p>What's the best way to fix this?</p>
  
  <p>Thanks.</p>