spring-data-jpa not casting from oracle.jdbc.drive

Question

i'm making a connection to an oracle db. I just solved problem with dependency (into the following url there's the needed code like respository, entity etc.):

spring-data-jpa 1.11.16 stored procedure with cursor

Now i'm facing problem with casting exeption when i call the repository. The repository sent me back a list of ForwardOnlyResultSet and i'm not able to map my results. that's the error:

Cannot cast 'oracle.jdbc.driver.ForwardOnlyResultSet' to 'procedure.entity.PocRegions'

my oracle pl/sql procedure is that:

PROCEDURE PRO_RETURN_REGION(
            id_region IN POC_REGIONS.REGION_ID%TYPE,
            o_cursor OUT SYS_REFCURSOR) is
            BEGIN
            --Opening the cursor to return matched rows
                open o_cursor for
                select *
                from POC_REGIONS
                where POC_REGIONS.REGION_ID = id_region;
    END PRO_RETURN_REGION;

Then i tryed to bot implement the call with jpa calls and spring-data-jpa call:

StoredProcedureQuery query = entityManager.createStoredProcedureQuery( "POC_PKG_GEO.PRO_RETURN_REGION");
        query.registerStoredProcedureParameter("id_region", BigDecimal.class, ParameterMode.IN);
        query.registerStoredProcedureParameter("o_cursor", void.class, ParameterMode.REF_CURSOR);

        query.setParameter("id_region", id);

        query.execute();

        //Contains a forwardonlyreswultset (jpa call)
        Object res = query.getOutputParameterValue("o_cursor");

        //Contains an array of 2 Object not mapped (jpa call)
        List<PocRegions> resultList = query.getResultList();

        //Contains a forwardonlyreswultset (spring-data-jpa call)
        List<PocRegions> region = geoRegionRepo.getRegion(id);

How should I be supposed to convert/map the retrieved value, to my entity?

Thank you