Message Mapping - Sum of all Element1.Field1 where Element1.Field2 = X

Question

Hi!
Has everyone an idee of how to do the following message mapping ?
My input message is :
E1EDP01
   E1EDP26
      QUALF = 001
      BETRG = 5
   E1EDP26
      QUALF = 003
      BETRG = 3
   E1EDP26
      QUALF = 002
      BETRG = 5
   E1EDP26
      QUALF = 003
      BETRG = 3
I want to get the sum of all E1EDP26.BETRG where E1EDP26.QUALF = "003".  There can be more than one E1EDP26 with field QUALF = "003".  So expected result is 6.
Thanks in advance,
Laurence

Answer 1

Input structure :
INVOIC02 1.1
     IDOC 1.1
          E1EDP01 0..999999
               E1EDP26 0..20
                    QUALF 0..1
                    BETRG 0.11
Output structure :
root 1..1
     GoodsDeclaration 1..1
          Invoice 0..1
               ExchangeRate 0..1
                    exchangeRate 0..1
                    currrency 1..1
                    exchangeDate 0..1
               invoiceAmount 0..1
The target field root/GoodsDeclaration/Invoice/invoiceAmount must be mapped with the sum of fields BETRG belonging to nodes E1EDP26 with field QUALF = "003".
Sample :
<INVOIC02>
     <IDOC>
          <E1EDP01>
               <E1EDP26>
                    <QUALF>001</QUALF>
                    <BETRG>5</BETRG>
               </E1EDP26>
               <E1EDP26>
                    <QUALF>003</QUALF>
                    <BETRG>1</BETRG>
               </E1EDP26>
               <E1EDP26>
                    <QUALF>002</QUALF>
                    <BETRG>5</BETRG>
               </E1EDP26>
               <E1EDP26>
                    <QUALF>003</QUALF>
                    <BETRG>2</BETRG>
               </E1EDP26>
          </E1EDP01>
     </IDOC>
</INVOIC02>
In this case, target field root/GoodsDeclaration/Invoice/invoiceAmount must have the value 3 :
<root>
     <GoodsDeclaration>
          <Invoice>
               <ExchangeRate>
                    <exchangeRate/>
                    <currrency/>
                    <exchangeDate/>
               </ExchangeRate>
               <invoiceAmount>3<invoiceAmount>
          </Invoice>
     </GoodsDeclaration>
</root>
Laurence