public CellLine getCells(Experiment expt) throws SQLException, UnknownRoleException { java.sql.Connection cxn = loader.getConnection(); PreparedStatement ps = cxn.prepareStatement("select cells from experiment" + " where id=?"); ps.setInt(1, expt.getDBID()); ResultSet rs = ps.executeQuery(); int cellsID = -1; if (rs.next()) { cellsID = rs.getInt(1); } rs.close(); ps.close(); return chipLoader.loadCellLine(cellsID); }