[Camel-users] Use FlexibleAggregationStrategy in Spring DSL

Would like to enrich component which looks up customerId based on name and
enrich the inMessage for processing.
Please provide a sample on flexibleAggreation on Spring DSL.
Something like :
  <camel:from uri="file:src/data?noop=true"/>
       <camel:choice>
         <camel:when>
           <camel:xpath>/person/city = 'London'</camel:xpath>
           <camel:log message="UK message"/>
              <camel:enrich beanRef="GetCityData" >


             </camel:enrich>
             <camel:aggregate>
                  <pick > <simple>"${header.ouput.pincode}</simple></pick>
                             <setHeader ${header.input.msg.pin}</setHeader>
           </camel:aggregate>
           <camel:to uri="file:target/messages/uk"/>
         </camel:when>
         <camel:otherwise>
           <camel:log message="Other message"/>
           <camel:to uri="file:target/messages/others"/>
         </camel:otherwise>
       </camel:choice>
     </camel:route>
   </camel:camelContext>
<bean id="appendXMLStragegy"
class="org.apache.camel.util.toolbox.FlexibleAggregationStrategy">