code: public ValueContainer[] getKeyValues(ClassDescriptor cld, Identity oid, boolean convertToSql) throws PersistenceBrokerException
      {
          FieldDescriptor[] pkFields = cld.getPkFields();
          ValueContainer[] result = new ValueContainer[pkFields.length];
          Object[] pkValues = oid.getPrimaryKeyValues();
  
          try
          {
              for(int i = 0; i < result.length; i++)
              {
                  FieldDescriptor fd = pkFields[i];
                  Object cv = pkValues[i];
                  if(convertToSql)
                  {
                      // BRJ : apply type and value mapping
                      cv = fd.getFieldConversion().javaToSql(cv);
                  }
                  result[i] = new ValueContainer(cv, fd.getJdbcType());
              }
          }
          catch(Exception e)
          {
              throw new PersistenceBrokerException("Can't generate primary key values for given Identity " + oid, e);
          }
          return result;
      }
docs: Return key Values of an Identity
  @param cld
  @param oid
  @param convertToSql
  @return Object[]
  @throws PersistenceBrokerException