Multiple series - shared RangeAxis

[nubiste]

Hi,

I get a nullPointerException on trying to draw a
CombinedDomainXYPlot with a subplot of type: XYPlot,
2 datasets type: TimeSeriesCollection
1 Range Axis type: NumberAxis

I've succesfuly drawn multiple series with shared RangeAxis with the same setup as above, the only differences being:
XYSeriesCollection instead of TimeSeriesCollection
In the problematic case the combinedPlot is being serialized/deserialized over the web and then drawn on the applet.
The test case that works, all happens localy.

I can send more details as needed.
Any help appreciated.

Thanks
Stelios

[nubiste]

ok I now have the demo (the one that runs locally)
and the "real" app (the one which the plot gets serialized/deserialized)

to be exactly the same, same number and types of combinedPlot, subplot, datasets, range etc. The only difference being the size of the series and the modCount of the subplot ArrayList which in the "demo" version is 1 and in the "real" is 0. As fas as I understand this is because the object I get upon deserialization doesn't detect a change in the subplot ArrayList.

The demo still works while the other fails. Is there any issue with serialization that is causing this?

[david.gilbert]

Can you post the full stack trace? The serialization should work as far as I know...some code to reproduce the error would be excellent.

[nubiste]

here is the stacktrace: I'll try to make a dame asap.

Code: Select all

Exception in thread "AWT-EventQueue-13" java.lang.NullPointerException
	at org.jfree.chart.renderer.xy.XYLineAndShapeRenderer.drawPrimaryLine(XYLineAndShapeRenderer.java:879)
	at org.jfree.chart.renderer.xy.XYLineAndShapeRenderer.drawItem(XYLineAndShapeRenderer.java:785)
	at org.jfree.chart.plot.XYPlot.render(XYPlot.java:2627)
	at org.jfree.chart.plot.XYPlot.draw(XYPlot.java:2205)
	at org.jfree.chart.plot.CombinedDomainXYPlot.draw(CombinedDomainXYPlot.java:453)
	at org.jfree.chart.JFreeChart.draw(JFreeChart.java:1058)
	at org.jfree.chart.ChartPanel.paintComponent(ChartPanel.java:1274)
	at javax.swing.JComponent.paint(Unknown Source)
	at javax.swing.JComponent.paintToOffscreen(Unknown Source)
	at javax.swing.BufferStrategyPaintManager.paint(Unknown Source)
	at javax.swing.RepaintManager.paint(Unknown Source)
	at javax.swing.JComponent._paintImmediately(Unknown Source)
	at javax.swing.JComponent.paintImmediately(Unknown Source)
	at javax.swing.RepaintManager.paintDirtyRegions(Unknown Source)
	at javax.swing.RepaintManager.paintDirtyRegions(Unknown Source)
	at javax.swing.RepaintManager.seqPaintDirtyRegions(Unknown Source)
	at javax.swing.SystemEventQueueUtilities$ComponentWorkRequest.run(Unknown Source)
	at java.awt.event.InvocationEvent.dispatch(Unknown Source)
	at java.awt.EventQueue.dispatchEvent(Unknown Source)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.awt.EventDispatchThread.run(Unknown Source)

I still believe there is some error somewhere in my code. The thing that I can't understand though is that in the debugger the plot seems identical...
After the deserialization that is.

Thanks
Stelios

[david.gilbert]

Which version of JFreeChart? (I'm trying to match up the line numbers in the stack trace).

[nubiste]

False alert, it was my error as suspected...
I had a wrong mapping (mapDatasetToRangeAxis) hence it was giving the NPE.

apologies
stelios