How to write loop in ibatis

Loop query

<isNotNull prepend="and" property="casesetIds">
   a.menu_id in
  <iterate  property="casesetIds" conjunction="," open="(" close=")">
    #casesetIds[]#
  </iterate>
 </isNotNull>

 

casesetIds is the property name in the entity class: List<String> casesetIds;