public interface XmlCriteriaShorthand
AdvancedCriteria is supported for
 simple criteria
  where the outer criterion is assumed to be an "and" operator:
  <!-- Simple format --> <criteria fieldName="restrictAge" operator="equals" value="true"/>This is equivalent to:
  <!-- Normal format -->
  <criteria _constructor="AdvancedCriteria operator="and">
    <criteria>
      <criterion fieldName="restrictAge" operator="equals" value="true"/>
    </criteria> 
  </criteria>