Mapping Requirement

Hi All,

Source structure:

<DESDAV>

<IDOC>

   <E1EDL20>

    ---

    ---

    <E1EDL37> 0 to unbounded

          <VHART/>

          <EXIDV/>

           <E1EDL44>

                <EXIDV/>

            </E1EDL44>

     </E1EDL37>

   </EIEDL20>

</IDOC>

Target structure:

<Containers>

  <Container>

     <F1>

     <F2>

     <Item>

       <F1>

       <F2>

Here I have 3 conditions

1) if all the E1EDL37-VHART field values are '002' then <container> needs to be generated the same number of times as E1EDL37-VHART occurs.(container = line item)

2) if any one of the E1EDL37-VHART is 'ZPAL' then the <Container> needs to be generated only once all E1EDL37's(002) becomes line itmes where E1EDL37(ZPAL) :E1EDL44-EXIDV=E1EDL37-EXIDV

3) If any two or more of the E1EDL37-VHART values are 'ZPAL' then <Container> needs to be generated as same number of E1EDL37: ZPAL and the corresponding E1EDL37 (002) will be added as the line items using this condition again E1EDL44-EXIDV=E1EDL37-EXIDV

Could any one please suggest how can we achieve this the mapping.

Thanks in Advance!