XYItemRenderer renderer = new XYLineAndShapeRenderer();
renderer.setBaseToolTipGenerator(new StandardXYToolTipGenerator());
if (reportChart.getDrillDownReport() != null)
{
renderer.setURLGenerator(new XYURLGenerator(
"executeReport.action?displayInline=" + displayInline
+ "&exportType=0&reportId="
+ reportChart.getDrillDownReport().getId(), "series",
ReportChart.DRILLDOWN_PARAMETER));
}