extract data from hash map for target structure mapping

Hello All

i have written a udf to extract material id and its related data in a hash map

hash map looks like below {Material_ID=[plant,uom,salesorg] combination - there are many material ids in the hashmap as shown below

{0061399=[1592345, 26728282, 29798989], 006139940=[1596889, 292909, 2989898], 006139996=[15965677, 989889, 990090] ...........................}

I want to extract these values inside the square braces and map it to the corresponding PI message mapping target structure fields for plant, uom, sales org. How do I achieve this?

The source structure is something like below

<Material>1.unbounded

<Material_ID/>

<plant/>

<uom/>

<salesorg/>

</Material>

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Target structure is like below

<Mat>1.unbounded

<Mat_ID/>

<werks/>

<unitofMeas/>

<salesorganiz/>

</Mat>

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thx

mike