title: Hibernate @NotEmpty annotation equivalent in Javax.package or alternative
body: <p>Is there a way to implement <code>@NotEmpty</code> hibernate validation without writing custom validation?
  javax.validation package does not contain this annotation. Only <code>@NotNull</code>. But it does not validate for Non-null but empty values. So I would like to see an alternative for <code>@NotEmpty</code>.</p>
  
  <p>Using <code>@Pattern</code>? How?</p>