Tree-style repeated speakers

I'm having a hard time building a report in jasper, which should have the following impression, follows ex:

Código SubCodigo Código Final
01        001       001
                    002
          003       001
                    002
                    003
          006       001

The problem I've been around, rounded, searched, and searched, and everyone I've checked none resembles this kind of report.

If some kind soul has experienced such a situation, please show me the path of the stones.