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Hierarchical Data Transformation

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hi folks,

I've spent several houres to figure out the solution for the following hierarchical data-transformation problem. Without any success!
Is there any best practice pattern in pdi for solving this:

Target-Structure (i.e in DataGrid)

level name
1 A
2 AA
2 AB
3 ABA
3 ABB
3 ABC
1 C
2 CA
3 CAA
3 CAB


to this Destination-Structure:


level1 level2 level3
A AA
A AB ABA
A AB ABB
A B ABC
C CA CAA
C CA CAB

The number of possible levels is static (3).

Thanks in advance for any useful answers.

mb

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