Using element as group criteria

[Barnes, Jim D]

Anyone know of any way to use an element in result map as "groupBy"
criteria.  For example, 


        <resultMap id="providerRelationshipResultMap"
class="ProviderRelationship"
groupBy="hospitalAssoc[0].physicianNumber, type">       
            <result property="hospitalAssoc"
resultMap="hospitalAssociationResultMap"/>
            <result property="type" column="CODE"/>     
        </resultMap>


Thanks!