[How to display two decimal values in percentage of a normal pie chart]

I already implemented the chart customizer suggested in this question: http://community.jaspersoft.com/questions/539659/how-show-percentage-decimal-value-pie-chart

I adapted it to use a normal pie chart:
 

import net.sf.jasperreports.engine.JRChart;import net.sf.jasperreports.engine.JRChartCustomizer;import org.jfree.chart.JFreeChart;import org.jfree.chart.labels.StandardPieSectionLabelGenerator;import org.jfree.chart.plot.PiePlot;public class PiePercentageCustomizer implements JRChartCustomizer{    @Override    public void customize(JFreeChart jFreeChart, JRChart jrChart) {        PiePlot piePlot = (PiePlot) jFreeChart.getPlot();        ((StandardPieSectionLabelGenerator)piePlot.getLabelGenerator()).getPercentFormat().setMaximumFractionDigits(2);    }    }[/code]

I generate a jar file and added it to my application classpath.

The problem is when I render my report I get the following exception:
 

Class

java.lang.ClassCastException

Message

net.sf.jasperreports.charts.util.PieLabelGenerator cannot be cast to org.jfree.chart.labels.StandardPieSectionLabelGenerator

My application is a grails 2.3.11 project using the jasper plugin 1.11.0

Any help will be appreciated

[Error]

Facing the same error too.
The error is raised only when I deploy the report into a grails application running on tomcat server, in development environment works fine.