ChartPostProcessor

[javacodeforger]

Hi,
I'm trying to create a ChartProstProcessor

When I try to display the chart it throw the error
de.laures.ceworlf.PostProcessingException:java.lang.ClassCastException

just when its doing this line
DateAxis dateAxis = (DateAxis)xyPlot.getDomainAxis();

------this is my class for post processing------

public class XYChartPostProcessor implements ChartPostProcessor
{
  public void processChart(Object object, Map params)
  {
    JFreeChart chart = (JFreeChart)object;
    System.out.println("one");
    XYPlot xyPlot = chart.getXYPlot();
    System.out.println("two");
    DateAxis dateAxis = (DateAxis)xyPlot.getDomainAxis();
    System.out.println("three");
    dateAxis.setDateFormatOverride(new SimpleDateFormat("dd.MM.yyyy"));
    System.out.println("four");
  }
}

----------------------------------------
my data producer is for the xy type chart
and the produceData method is as listed below

  public Object produceDataset(Map map) throws DatasetProduceException
  {
    TimeSeries timeseries = new TimeSeries(producerId, org.jfree.data.time.Day.class);

    List data = this.dataList;

    for(int i=0; i<data.size();i++)
    {
      StockQuoteHistory quote =  (StockQuoteHistory)data.get(i);
      Date date = quote.getQuoteTime();
      Day dayT = new Day(date);
      timeseries.add(dayT, quote.getClosePrice());
    }

    TimeSeriesCollection timeseriescollection = new TimeSeriesCollection();
    timeseriescollection.addSeries(timeseries);

    return (XYDataset)timeseriescollection;
  }

----------------------------

so i'm returning the timeseriescollection cast as XYDataset.

When I execute my application without the ChartPostProcessor tag it works fine. Just that it displays the X axis as milliseconds. I'm trying to get it to display as date.

[Zoltan Luspai]

Hi,

Since axis is not a DateAxis instance (but a NumberAxis class as see in ChartFactory.createXYLineChart method).

You're free to create and use your own DateAxis:

DateAxis dateAxis = new DateAxis();
xyplot.setDateAxis(dateAxis);
...

Well you may need to configure this dateAxis like the date format.