/*****************************************************************/
/* Copyright 2013 Code Strategies                                */
/* This code may be freely used and distributed in any project.  */
/* However, please do not remove this credit if you publish this */
/* code in paper or electronic form, such as on a web site.      */
/*****************************************************************/

package chart;

import java.awt.BasicStroke;
import java.awt.Color;
import java.io.IOException;
import java.io.OutputStream;

import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartUtilities;
import org.jfree.chart.JFreeChart;
import org.jfree.data.general.DefaultPieDataset;

public class ChartServlet extends HttpServlet {

	private static final long serialVersionUID = 1L;

	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException {

		response.setContentType("image/png");

		OutputStream outputStream = response.getOutputStream();

		JFreeChart chart = getChart();
		int width = 500;
		int height = 350;
		ChartUtilities.writeChartAsPNG(outputStream, chart, width, height);

	}

	public JFreeChart getChart() {
		DefaultPieDataset dataset = new DefaultPieDataset();
		dataset.setValue("Ford", 23.3);
		dataset.setValue("Chevy", 32.4);
		dataset.setValue("Yugo", 44.2);

		boolean legend = true;
		boolean tooltips = false;
		boolean urls = false;

		JFreeChart chart = ChartFactory.createPieChart("Cars", dataset, legend, tooltips, urls);

		chart.setBorderPaint(Color.GREEN);
		chart.setBorderStroke(new BasicStroke(5.0f));
		chart.setBorderVisible(true);

		return chart;
	}

}