com.antelmann.servlet
Class PieChartImageServlet

java.lang.Object
  javax.servlet.GenericServlet
      javax.servlet.http.HttpServlet
          com.antelmann.servlet.PieChartImageServlet

All Implemented Interfaces:

Serializable, javax.servlet.Servlet, javax.servlet.ServletConfig

@ThirdParty(value="uses jfree chart libraries")
public final class PieChartImageServlet
extends javax.servlet.http.HttpServlet

generates a pie chart image based on input parameters

Author:

Holger Antelmann

See Also:

doGet(HttpServletRequest, HttpServletResponse), Serialized Form

Constructor Summary

PieChartImageServlet()

Method Summary

protected void	doGet(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response) understands the special parameter width, height and title; all other paramters are mapped to their corresponding number value to be displayed in the chart.
protected void	doPost(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response) calls the GET method
static BufferedImage	generateChartImage(String title, Map<String,Number> data, int width, int height)

Methods inherited from class javax.servlet.http.HttpServlet

doDelete, doHead, doOptions, doPut, doTrace, getLastModified, service, service

Methods inherited from class javax.servlet.GenericServlet

destroy, getInitParameter, getInitParameterNames, getServletConfig, getServletContext, getServletInfo, getServletName, init, init, log, log

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

PieChartImageServlet

public PieChartImageServlet()

Method Detail

generateChartImage

public static BufferedImage generateChartImage(String title,
                                               Map<String,Number> data,
                                               int width,
                                               int height)

doPost

protected void doPost(javax.servlet.http.HttpServletRequest request,
                      javax.servlet.http.HttpServletResponse response)
               throws IOException,
                      javax.servlet.ServletException

calls the GET method

Overrides:

doPost in class javax.servlet.http.HttpServlet

Throws:

IOException

javax.servlet.ServletException

doGet

protected void doGet(javax.servlet.http.HttpServletRequest request,
                     javax.servlet.http.HttpServletResponse response)
              throws IOException,
                     javax.servlet.ServletException

understands the special parameter width, height and title; all other paramters are mapped to their corresponding number value to be displayed in the chart.

Overrides:

doGet in class javax.servlet.http.HttpServlet

Throws:

IOException

javax.servlet.ServletException