EventTypePercentageDiagramm.java

package sushi.application.pages.monitoring.visualisation;
 
import sushi.event.SushiEvent;
import sushi.event.SushiEventType;

import com.googlecode.wickedcharts.highcharts.options.ChartOptions;
import com.googlecode.wickedcharts.highcharts.options.Cursor;
import com.googlecode.wickedcharts.highcharts.options.DataLabels;
import com.googlecode.wickedcharts.highcharts.options.Options;
import com.googlecode.wickedcharts.highcharts.options.PlotOptions;
import com.googlecode.wickedcharts.highcharts.options.PlotOptionsChoice;
import com.googlecode.wickedcharts.highcharts.options.SeriesType;
import com.googlecode.wickedcharts.highcharts.options.Title;
import com.googlecode.wickedcharts.highcharts.options.Tooltip;
import com.googlecode.wickedcharts.highcharts.options.color.HexColor;
import com.googlecode.wickedcharts.highcharts.options.color.NullColor;
import com.googlecode.wickedcharts.highcharts.options.functions.PercentageFormatter;
import com.googlecode.wickedcharts.highcharts.options.series.Point;
import com.googlecode.wickedcharts.highcharts.options.series.PointSeries;
import com.googlecode.wickedcharts.highcharts.options.series.Series;
 
/**
 * This class prepares a pie diagram that illustrates the percentage of events by event type.
 * This object can be used to create a chart-object with the wicked chart framework.
 */
public class EventTypePercentageDiagramm extends Options {
 
  private static final long serialVersionUID = 1L;
 
  public EventTypePercentageDiagramm() {
 
    setChartOptions(new ChartOptions()
        .setPlotBackgroundColor(new NullColor())
        .setPlotBorderWidth(null)
        .setPlotShadow(Boolean.FALSE));
 
    setTitle(new Title("Percentage of Events by Event Types"));
 
    setTooltip(new Tooltip()
        .setFormatter(new PercentageFormatter())
        .setPercentageDecimals(1));
 
    setPlotOptions(new PlotOptionsChoice()
        .setPie(new PlotOptions()
            .setAllowPointSelect(Boolean.TRUE)
            .setCursor(Cursor.POINTER)
            .setDataLabels(new DataLabels()
                .setEnabled(Boolean.TRUE)
                .setColor(new HexColor("#000000"))
                .setConnectorColor(new HexColor("#000000"))
                .setFormatter(new PercentageFormatter()))));
 
    addSeries(prepareEventSeries());
 
  }

  /**
   * prepare data for diagram by calculating percentages of events by eventtype
   * @return data series for pie chart
   */
  private Series<Point> prepareEventSeries() {
		Series<Point> series = new PointSeries()
	    .setType(SeriesType.PIE)
	    .setName("Event Types Percentage");
		
		//get overall number of events
		double numberOfEvents = SushiEvent.getNumberOfEvents();
	
		for (SushiEventType type : SushiEventType.findAll()) {
			double numberOfEventsOfEventType = SushiEvent.getNumberOfEventsByEventType(type);
			double percentage = 0;
			if (numberOfEvents > 0) {
				//calculate percentage
				percentage = numberOfEventsOfEventType / numberOfEvents;
			}
			series.addPoint(new Point(type.getTypeName(), Math.round(percentage* 100)/100.0));
		}
		return series;
	}
 
}