How can I add items to ChartSeries in my BarChartModel? - primefaces

Question

I'm using PrimeFaces, in order to build a BarChart. My goal is to compare some Testprojects to each other. Each Bar should be a Testproject from which you can read off the different Phases in which the project is situated.
My question is: I have a View where I can add new Testprojects. When I add one, there is a new Bar. But If I want to add another one, the old Bar is owerwritten. Of course It is, because of set... but I would like to do something like add(testprojectProducer.getTestproject().getName(), 1).
The chart schould be able to remembe the old bar and add the new one. Is there a way or do I have to say goodby to primefaces and build my own chart?
Here is my code:
#ManagedBean
public class ChartView implements Serializable {
private static final long serialVersionUID = 9181815723688700642L;
private BarChartModel barModel;
#Inject
private TestprojectProducer testprojectProducer;
#PostConstruct
public void init() {
createBarModel();
new ArrayList<String>();
}
private BarChartModel initBarModel() {
BarChartModel model = new BarChartModel(); //Diagram
ChartSeries cs= new ChartSeries(); // Balken
cs.setLabel("Testprojekte");
cs.set("Testprojekt 1",5);
cs.set(testprojectProducer.getTestproject().getName(), 1);
model.addSeries(cs);
return model;
}
public void createBarModel() {
barModel =initBarModel();
barModel.setTitle("");
barModel.setLegendPosition("");
barModel.setSeriesColors("C80000");
Axis xAxis = barModel.getAxis(AxisType.X);
xAxis.setLabel("Testprojekte");
Axis yAxis = barModel.getAxis(AxisType.Y);
yAxis.setLabel("Phasen");
yAxis.setMin(0);
yAxis.setMax(7);
}
public BarChartModel getBarModel() {
return barModel;
}
public void setBarChartModel(BarChartModel barModel){
this.barModel= barModel;
}
}
I hope there is a solution to my problem. Thank you!

Answer 1

I resolved my problem. When you use 'HashMap', then It's not that hard:
private BarChartModel initBarModel() {
BarChartModel model = new BarChartModel();
ChartSeries cc = new ChartSeries();
cc.setLabel("Testprojekte");
HashMap<Object, Number> groupData = new HashMap<Object, Number>();
for (int i = 0; i < 3; i++) {
groupData.put(testProjectListProducer.getList().get(i).getName(), 2);
}
cc.setData(groupData);
model.addSeries(cc);
return model;
}