code: @Override
      public boolean isConnected(final Connection _connection)
          throws SQLException
      {
          boolean ret = false;
          final Statement stmt = _connection.createStatement();
          try {
              final ResultSet resultset = stmt
                          .executeQuery("select product from product_component_version where product like 'Oracle%'");
              ret = resultset.next();
              resultset.close();
          } finally {
              stmt.close();
          }
          return ret;
      }
docs: {@inheritDoc}
  @throws SQLException