Report Designer creates legacy classes for BarChar

[jbleuel]

Using the Report Designer creates legacy classes when a BarChart and.CategorySetCollectorFunction is used:
class="org.pentaho.jfreereport.legacy.BarChartExpression">
class="org.pentaho.jfreereport.legacy.CategorySetCollectorFunction">

In the Pentaho samples directory the following classes are used (file JFreeQuadForRegionWithChart.xml):
class="org.pentaho.plugin.jfreereport.reportcharts.CategorySetCollectorFunction"
class="org.pentaho.plugin.jfreereport.reportcharts.BarChartExpression"

1) Is this intentional?

I figured this out when I tried to change the X/Y-Axis in the Report Designer what I did not solved.
2) How can I swap the X/Y-Axis?

Thanks for this great designer and your help in advance,
Jens