[jCharts-users] Problems (NullPointer or ArrayIndex) if no data available for barchart

[<tam...@ub...>]

hi all

we are generating clusteredbarcharts based on the result of some =
database selects, so the data to display is not static.
we have a problem if there is no data. I have tried different ways to =
tweak this issue, but always ran into troubles:

I'm using jcharts 0.7.4 (the posted methods are the same in 0.7.5)=20

- legendlabels and data array (double[][]) are null=20

java.lang.NullPointerException
	at =
org.jCharts.chartData.AxisChartDataSet.getNumberOfDataSets(AxisChartDataS=
et.java:136)
	at =
org.jCharts.chartData.AxisDataSeries.addIAxisPlotDataSet(AxisDataSeries.j=
ava:166)

code which throws exception [AxisChartDataSet.getNumberOfDataSets]:
	public final int getNumberOfDataSets()
	{
		return this.data.length;
	}

- legenlabels is null, data array is new double[0][0];

java.lang.ArrayIndexOutOfBoundsException: 0
	at org.jCharts.chartData.DataSet.getNumberOfDataItems(DataSet.java:148)
	at =
org.jCharts.chartData.AxisDataSeries.addIAxisPlotDataSet(AxisDataSeries.j=
ava:168)

code which throws exception [DataSet.getNumberOfDataItems]:
	public int getNumberOfDataItems()
	{
		return this.data[ 0 ].length;
	}

is there any reason, why null and/or length is not checked in those =
methods ??=20

is there any other way to get a empty chart, I do set=20
setUserDefinedScale(0, 2)
setNumItems(5)


regards

tamer