public class View extends ViewPart {
    @Inject //perhaps this statment is nonsens (?)
    public View(Composite parent) {
        createPartControl(parent);
    }
    public void createPartControl(Composite parent) {
        JFreeChart chart = createChart(createDataset());
        final ChartComposite frame = new ChartComposite(parent,SWT.NONE,chart,true);
    }
    private JFreeChart createChart(PieDataset dataset) {...}
    public PieDataset createDataset(){...}
}