Dynamic finders

[Stefan Paun]

 Does anybody have a solution for implementing a finder that takes some
parameters, but searches taking into account only the ones that are not
null?
 Basically, this would be used to support a search page in which the user
can choose to fill or not some fields of the search criteria.
 I know that probably the best way to do this is using a Session Bean and
JDBC, but is there a way to implement it using CMP Entity finders (in
EJB1.1)?

Thanks,
Stefan