Oracle exp tool

Hi

I wonder if oracle gives a tool similar to exp but which would
1) get a list of tables wich are connected by foerign keys constraints (i know exp does)
2) get a 'where query for one table' lets call it X table (i know exp does)
3) export rows form X which filfull given where clause
4) export all rows form the other tables wich are connected with exported rows from X (i think exp can't do that).

I write a plsql package which almost do that export but wonder if there is some soft which do that.

re: Oracle exp tool

it is always better to write your own customized routine for such specific requirement.