Extract fields from the SOAP body during mapping

Question

Hi all,
I have an Abap Proxy to SOAP scenario with a main payload and an attachment. During mapping I need the reference of the attachment to store the reference in the main payload. I don't need the attachment itself.
SOAP-Body:
  <?xml version="1.0" encoding="UTF-8" standalone="yes" ?>
- <!--  Eingangs-Message
  -->
- <SAP:Manifest xmlns:SAP="http://sap.com/xi/XI/Message/30" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:wsu="http://www.docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd" wsu:Id="wsuid-manifest-5CABE13F5C59AB7FE10000000A1551F7">
- <SAP:Payload xlink:href="cid:payload-E742FF47D930DE5CE1000000C107826A @sap.com">
  <SAP:Name>MainDocument</SAP:Name>
  <SAP:Description />
  <SAP:Type>Application</SAP:Type>
  </SAP:Payload>
- <SAP:Payload xlink:href="cid:payload-EE42FF47D930DE5CE1000000C107826A @sap.com">
  <SAP:Name>hugo.txt</SAP:Name>
  <SAP:Description />
  <SAP:Type>ApplicationAttachment</SAP:Type>
  </SAP:Payload>
  </SAP:Manifest>
I need the attachment reference as string inside my main payload: cid:payload-EE42FF47D930DE5CE1000000C107826A @sap.com
I wrote an user defined function to select the MessageId, but the MessageId is only part of the reference to the main payload.
String constant;
java.util.Map map;
map = container.getTransformationParameters();
constant = (String) map.get(StreamTransformationConstants.MESSAGE_ID);
return constant;
Has anybody an idea to get the reference of the attachment from the SOAP body with an user defined function or an adapter module?
Thanks and kind regards
Frank

Answer 1

Hello,
thank you all for the information. I found a solution for my problem on the sender side. I wrote an own helper class with  the method create_attach_from_txt_withref. This method  build an attachment with an own reference and write the reference back to the payload.
This reference will not be changed within the execute_asynchronous method of the proxy.
Method parameters:
P_DATA        Importing   Type     STRING
P_TYPE        Importing   Type     STRING
P_NAME        Importing   Type     STRING
P_ATTACHMENT  Exporting   Type Ref IF_AI_ATTACHMENT
P_AREF        Exporting   Type     STRING
Method coding:
METHOD create_attach_from_txt_withref.
  DATA: lo_attachment TYPE REF TO cl_ai_attachment,
        l_payload     TYPE REF TO if_xms_payload,
        l_pref        TYPE        sxms_mf_s,
        l_guid        TYPE        guid_32,
        l_aref        TYPE        string.
  CLASS cl_ai_factory DEFINITION LOAD.
" create the attachment
  p_attachment = cl_ai_factory=>create_attachment_from_text(
                p_data = p_data             " attachment data
                p_type = p_type             " attachment type
                p_name = p_name ).          " attachment name
" we need an implementing class of the interface if_ai_attachment
  lo_attachment ?= p_attachment.
" get the new payload
  l_payload = lo_attachment->get_payload( ).
" get the reference of the payload
  l_pref = l_payload->getreference( ).
" build an own reference
  CALL FUNCTION 'GUID_CREATE'
    IMPORTING
      ev_guid_32 = l_guid.
  CONCATENATE 'payload-' l_guid '@sap.com' INTO l_aref.
  CONCATENATE 'cid:'     l_aref            INTO l_pref-href.
" set our own reference
  l_payload->setreference( reference = l_pref ).
" write back the modified payload
  lo_attachment->set_payload( p_payload = l_payload ).
" return of the reference
  p_aref = l_aref.
ENDMETHOD.
If anybody has an idea how to read the soap body within an adapter module please let me know.
Regards
Frank