BarChart.java

package org.radargun.reporting.html;

import org.jfree.chart.ChartFactory;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.renderer.category.StatisticalBarRenderer;
import org.jfree.data.statistics.DefaultStatisticalCategoryDataset;

/**
 * Chart showing the values as vertical bars.
 *
 * @author Mircea Markus <Mircea.Markus@jboss.com>
 */
public class BarChart extends ComparisonChart {

   protected final DefaultStatisticalCategoryDataset categorySet = new DefaultStatisticalCategoryDataset();
   protected boolean hasDeviations = false;
   protected double upperRange = 0;

   public BarChart(String domainLabel, String rangeLabel) {
      super(domainLabel, rangeLabel);
   }

   @Override
   protected JFreeChart createChart() {
      JFreeChart chart = ChartFactory.createBarChart(null, domainLabel, rangeLabel,
         categorySet, PlotOrientation.VERTICAL, true, false, false);
      if (hasDeviations) {
         chart.getCategoryPlot().setRenderer(new StatisticalBarRenderer());
      }
      if (upperRange > 0) {
         chart.getCategoryPlot().getRangeAxis().setRange(0, upperRange * 1.1);
      }
      return chart;
   }

   @Override
   public void addValue(double value, double deviation, Comparable seriesName, double xValue, String xString) {
      hasDeviations = deviation != 0;
      upperRange = Math.max(upperRange, Math.min(value + deviation, 3 * value));
      categorySet.add(value, deviation, seriesName, xString);
   }
}