dcm4che Query/Retrieve SCP

Question

Hi! First of all, I'm new in dcm4che and without a good Documentation is difficult to begin, therefore excuse my ignorance.

I've to develop a Query/Retrieve SCP and I need to know the query parameters, in the doCFind function, entered by the SCU. Example: SCU does: dcmqr MYQR@localhost:10001 -q PatientName=Manuel

How can I catch the query parameters (PatientName and Manuel) in the doCFind function?

protected synchronized DimseRSP doCFind(
    Association as, int pcid, DicomObject cmd,
    DicomObject keys, DicomObject rsp)

Thanks