Message Mapping - SUM a field per unique combination of 2 other fields?

Question

I'm receiving a proxy with detail records, and I need to create a subtotals file.  Here an example:
BEFORE MAPPING
   <ROW>
      <KOSTL>0000010300</KOSTL>
      <POSID>DUMMY</POSID>
      <FTE>0.51</FTE>
   </ROW>
   <ROW>
      <KOSTL>0000010400</KOSTL>
      <POSID>123</POSID>
      <FTE>0.49</FTE>
   </ROW>
   <ROW>
      <KOSTL>0000010400</KOSTL>
      <POSID>DUMMY</POSID>
      <FTE>0.72</FTE>
   </ROW>
   <ROW>
      <KOSTL>0000010400</KOSTL>
      <POSID>123</POSID>
      <FTE>0.82</FTE>
   </ROW>
   <ROW>
      <KOSTL>0000010300</KOSTL>
      <POSID>DUMMY</POSID>
      <FTE>0.18</FTE>
   </ROW>
AFTER MAPPING:
   <ROW>
      <KOSTL>0000010300</KOSTL>
      <POSID>DUMMY</POSID>
      <FTE>0.59</FTE>
   </ROW>
   <ROW>
      <KOSTL>0000010400</KOSTL>
      <POSID>123</POSID>
      <FTE>1.31</FTE>
   </ROW>
   <ROW>
      <KOSTL>0000010400</KOSTL>
      <POSID>DUMMY</POSID>
      <FTE>0.72</FTE>
   </ROW>
How do I create a new record for all unquie combinations of KOSTL and POSID?  And total the FTE field for each line?  Can this be done in a message mapping?

Answer 1

Hello,
How do I create a new record for all unquie combinations of KOSTL and POSID? And total the FTE field for each line? Can this be done in a message mapping?
Yes, very much possible with or without UDF. See sample mapping below without using UDF:
For ROW:
KOSTL(set context to row) -> concat: -> sort: case insensitive ascending -> splitByValue:valueChanged -> collapseContext -> ROW
POSID(set context to row) ->  /
For KOSTL:
KOSTL(set context to row) -> concat: ----------------> sortByKey: case insensitive ascending -> formatByExample -> collapseContext -> splitByValue:eachValue -> KOSTL
POSID(set context to row) -> /      KOSTL(set context to row) ->/                                          /
KOSTL(set context to row) -> concat: -> sort: case insensitive ascending -> splitByValue:valueChanged -> /
POSID(set context to row) ->  /
For POSID:
KOSTL(set context to row) -> concat: ----------------> sortByKey: case insensitive ascending -> formatByExample -> collapseContext -> splitByValue:eachValue -> POSID
POSID(set context to row) -> /      POSID(set context to row) ->/                                          /
KOSTL(set context to row) -> concat: -> sort: case insensitive ascending -> splitByValue:valueChanged -> /
POSID(set context to row) ->  /
For FTE:
KOSTL(set context to row) -> concat: ----------------> sortByKey: case insensitive ascending -> formatByExample -> sum -> splitByValue:eachValue -> FTE
POSID(set context to row) -> /      FTE(set context to row) ->/                                            /
KOSTL(set context to row) -> concat: -> sort: case insensitive ascending -> splitByValue:valueChanged -> /
POSID(set context to row) ->  /
Hope this helps,
Mark