title: Spring StandardMultipartHttpServletRequest validation
body: <p>Is there any possibility to validate <a href="http://docs.spring.io/autorepo/docs/spring/4.1.6.RELEASE/javadoc-api/index.html?org/springframework/web/multipart/support/StandardMultipartHttpServletRequest.html" rel="nofollow"><code>StandardMultipartHttpServletRequest</code></a> using standard <a href="http://docs.oracle.com/javaee/7/api/javax/validation/Valid.html" rel="nofollow"><code>@Valid</code></a> annotation and custom <a href="http://docs.spring.io/autorepo/docs/spring/4.1.6.RELEASE/javadoc-api/index.html?org/springframework/web/multipart/support/StandardMultipartHttpServletRequest.html" rel="nofollow"><code>Validator</code></a>? </p>
  
  <p>I've implemented such validator, annotated method param in controller the validator is not invoked.</p>