Null 'dataset' exception when rendering charts

[al_ryder]

Hi,

I was wondering if there was a workaround for the fact that for some charts when the query associated with them returns null, the rendering of the chart dies. i.e.  I have a report with a Area Chart and the whole report dies because the chart sometimes get passed null data:

java.lang.IllegalArgumentException: Null 'dataset' argument. at org.jfree.data.general.DatasetUtilities.findStackedRangeBounds(DatasetUtilities.java:1364) at org.jfree.data.general.DatasetUtilities.findStackedRangeBounds(DatasetUtilities.java:1349) at org.jfree.chart.renderer.category.StackedAreaRenderer.findRangeBounds(StackedAreaRenderer.java:171) at org.jfree.chart.plot.CategoryPlot.getDataRange(CategoryPlot.java:3897) at org.jfree.chart.axis.NumberAxis.autoAdjustRange(NumberAxis.java:428) at org.jfree.chart.axis.NumberAxis.configure(NumberAxis.java:411) at org.jfree.chart.axis.Axis.setPlot(Axis.java:964) at org.jfree.chart.plot.CategoryPlot.(CategoryPlot.java:542) at org.jfree.chart.ChartFactory.createStackedAreaChart(ChartFactory.java:1185)

 

Thanks

Al

 

Post Edited by al_ryder at 05/20/2010 00:59

[lucianc]

On which band is your chart placed?  Does it use a subdataset?

On some cases, there might be ways to address this.  For a general solution, log a bug/feature request on the JasperReports project trackers.

Regards,

Lucian

[al_ryder]

thanks Lucian,

 

we just did a work around. Checked to see if any data returned from SQL, if none then just populated the chart dataset with a default value.

[mauricio]

Hello I have same problem. My chart is placed on a group header band and yes, it uses a subdataset. In fact report has many subdatasets an many charts placed on group header bands. Please I welcome any advice, thanks.

 

EDIT: sorry my error. it works now. no error message