/**
* Copyright (c) 2013, Institute of Information Systems (Sven Groppe and contributors of LUPOSDATE), University of Luebeck
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are permitted provided that the
* following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice, this list of conditions and the following
* disclaimer.
* - Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the
* following disclaimer in the documentation and/or other materials provided with the distribution.
* - Neither the name of the University of Luebeck nor the names of its contributors may be used to endorse or promote
* products derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package lupos.event.consumer.app.charts;
import java.util.Iterator;
import lupos.datastructures.bindings.Bindings;
import lupos.datastructures.items.Variable;
import lupos.datastructures.items.literal.Literal;
import lupos.datastructures.queryresult.QueryResult;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.data.statistics.HistogramDataset;
import org.jfree.data.statistics.HistogramType;
/**
* Wrapper for HistogramDatasets
* @author heidemey
*
*/
public class HistogramChartModel extends DataModel {
int numberBins;
public HistogramChartModel(ChartTyp type){
super(type);
dataset = new HistogramDataset();
}
public HistogramChartModel(ChartTyp type, String[] vars){
super(type);
dataset = new HistogramDataset();
numberBins=Integer.parseInt(vars[1]);
categoryVar=new Variable(vars[0]);
}
@Override
public HistogramDataset getDataset(){
return (HistogramDataset) super.dataset;
}
/**
* Set the number of bins for the histogram
* @param numberOfBins
*/
public void setNrBins(int numberOfBins){
this.numberBins=numberOfBins;
}
@Override
public void fillDataset(QueryResult l) {
dataset=new HistogramDataset();
double[] values = new double[l.size()];
int i=0;
Iterator<Bindings> it = l.getCollection().iterator();
// fill the data model of the chart
while (it.hasNext()) {
Bindings bind = it.next();
Number value = null;
// find the variable ...
Literal lit = bind.get(categoryVar);
if (lit != null) {
// ... and extract the category
value = literal2Number(lit);
if (value != null)
values[i] = value.doubleValue();
}
i++;
}
if (numberBins != 0)
getDataset().addSeries("Histogram", values, numberBins);
}
@Override
public JFreeChart makeChart() {
JFreeChart chart=null;
getDataset().setType(HistogramType.RELATIVE_FREQUENCY);
chart = ChartFactory.createHistogram("Chart", categoryVar.getName(), "height", getDataset(), PlotOrientation.VERTICAL, false, true, false);
return chart;
}
}