org.codehaus.mojo.chronos.chart.HistogramChartGenerator.java Source code

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Here is the source code for org.codehaus.mojo.chronos.chart.HistogramChartGenerator.java

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/*
 * Chronos - Copyright (C) 2011 National Board of e-Health (NSI), Denmark (http://www.nsi.dk)
 *
 * All source code and information supplied as part of Chronos is
 * copyright to National Board of e-Health.
 *
 * The source code has been released under a dual license - meaning you can
 * use either licensed version of the library with your code.
 *
 * It is released under the LGPL (GNU Lesser General Public License), either
 * version 2.1 of the License, or (at your option) any later version. A copy
 * of which can be found at the link below.
 * http://www.gnu.org/copyleft/lesser.html
 *
 * $HeadURL$
 * $Id$
 */
package org.codehaus.mojo.chronos.chart;

import java.util.ResourceBundle;

import org.codehaus.mojo.chronos.ReportConfig;
import org.codehaus.mojo.chronos.responsetime.ResponsetimeSamples;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.plot.XYPlot;
import org.jfree.chart.renderer.xy.XYBarRenderer;
import org.jfree.data.statistics.HistogramDataset;

/**
 * This class is responsible for generating histograms.
 * 
 * @author ksr@lakeside.dk
 */
public abstract class HistogramChartGenerator extends ChartUtil {

    private static final int BINS = 100;
    private static final float FOREGROUND_ALPHA = 0.85F;

    protected final JFreeChart createHistogramChart(ResponsetimeSamples samples, String label,
            ResourceBundle bundle, ReportConfig config) {
        HistogramDataset histogramdataset = new HistogramDataset();

        double[] sampleArray = samples.extractResponsetimes(config.getResponsetimedivider());
        histogramdataset.addSeries(label, sampleArray, BINS);
        HistogramDataset dataset = histogramdataset;
        JFreeChart chart = ChartFactory.createHistogram(bundle.getString("chronos.label.histogram"),
                bundle.getString("chronos.label.histogram.x"), bundle.getString("chronos.label.histogram.y"),
                dataset, PlotOrientation.VERTICAL, true, false, false);
        XYPlot xyplot = (XYPlot) chart.getPlot();
        xyplot.setForegroundAlpha(FOREGROUND_ALPHA);
        XYBarRenderer xybarrenderer = (XYBarRenderer) xyplot.getRenderer();
        xybarrenderer.setDrawBarOutline(false);

        if (config.isShowpercentile()) {
            String label1 = bundle.getString("chronos.label.percentile95.arrow");
            double value = samples.getPercentile95(config.getResponsetimedivider());
            ChartUtil.addDomainMarker(xyplot, label1, value);
        }
        if (config.isShowaverage()) {
            String label2 = bundle.getString("chronos.label.average.arrow");
            double value = samples.getAverage(config.getResponsetimedivider());
            ChartUtil.addDomainMarker(xyplot, label2, value);
        }
        return chart;
    }
}