code: public Object[] valuesForColumns(T bo, String... columns) {
          Map<String, ColAttrMapping> columnAttributeMappings = getColumnAttributeMappings();
          Object[] result = new Object[columns.length];
          for (int i = 0; i < columns.length; i++) {
              ColAttrMapping colAttrMapping = columnAttributeMappings.get(columns[i]);
              try {
                  result[i] = colAttrMapping != null ? colAttrMapping.extractAttrValue(bo) : null;
              } catch (Exception e) {
                  throw e instanceof RuntimeException ? (RuntimeException) e
                          : new RuntimeException(e);
              }
          }
          return result;
      }
docs: Extract attribute values from a BO for corresponding DB table columns
  
  @param bo
  @return