?? chartservlet.java
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PieChart pie = new PieChart();
// set the title for the Pie Chart
if (data.containsKey("Title")) {
pie.title = req.getParameter("Title");
data.remove("Title");
}
// what type?
if (data.containsKey("Type")) {
String type = req.getParameter("Type");
if (type.equalsIgnoreCase("2D")) {
pie.type = PieChart.TYPE2D;
} else if (type.equalsIgnoreCase("3D")) {
pie.type = PieChart.TYPE3D;
} else if (type.equalsIgnoreCase("Ring")) {
pie.type = PieChart.TYPERING;
}
data.remove("Type");
}
// get the chart data from an XML file or...
if (data.containsKey("XMLFile")) {
URL url = getClass().getResource(req.getParameter("XMLFile"));
try
{
java.io.InputStream inputstream = url.openStream();
pie.dataset = (DefaultPieDataset) DatasetReader.readPieDatasetFromXML(inputstream);
}
catch(IOException ioexception)
{
System.out.println(ioexception.getMessage());
}
data.remove("XMLFile");
} else {
// get the data from the map
for (Iterator<Entry<String, String[]>> it=data.entrySet().iterator(); it.hasNext(); ) {
Map.Entry entry = it.next();
String key = (String) entry.getKey();
String value[] = (String[]) entry.getValue();
pie.dataset.setValue(key,new Double(value[0]));
//out.println("<br>Key : " + key);
//out.println(" Value : " + value[0]);
}
}
// create pie chart
JFreeChart chart = pie.getChart();
return chart;
}
/**
* Create category chart method.
*
* @param map which can consist of elements such as:
* <ul>
* <li> Type - the type of chart: either Bar, Bar3D, Area, Line, or Line3D.</li>
* <li> Title - the title of the chart.</li>
* <li> XLabel - the domain title.</li>
* <li> YLabel - the range title.<li>
* <li> Orientation - the orientation of the chart, either H or V.<li>
* <li> Range - the upper and lower value of the range. Format is Range=lower,upper, e.g. Range=68,72.</li>
* <li> XMLFile - the XML file name if applicable.</li>
* <li> data - the data to plot. Format is name=value&name=value, eg: Fish=70&Chips=66.</li>
* </ul>
* @param req which is the Http Servlet Request
*
* @return JFreeChart
* @throws ServletException
*
*/
private JFreeChart createCategory(Map<String, String[]> map, HttpServletRequest req)
throws ServletException {
CategoryChart bar = new CategoryChart();
// set the title for the Category Chart
if (map.containsKey("Title")) {
bar.title = req.getParameter("Title");
map.remove("Title");
}
// what type? (default is Bar)
if (map.containsKey("Type")) {
String type = req.getParameter("Type");
if (type.equalsIgnoreCase("Bar")) {
bar.type = CategoryChart.TYPEBAR;
} else if (type.equalsIgnoreCase("Bar3D")) {
bar.type = CategoryChart.TYPEBAR3D;
} else if (type.equalsIgnoreCase("Area")) {
bar.type = CategoryChart.TYPEAREA;
} else if (type.equalsIgnoreCase("Line")) {
bar.type = CategoryChart.TYPELINE;
} else if (type.equalsIgnoreCase("Line3D")) {
bar.type = CategoryChart.TYPELINE3D;
}
map.remove("Type");
}
// set the range
if (map.containsKey("XLabel")) {
bar.range = req.getParameter("XLabel");
map.remove("XLabel");
}
// set the domain
if (map.containsKey("YLabel")) {
bar.domain = req.getParameter("YLabel");
map.remove("YLabel");
}
// set the orientation
if (map.containsKey("Orientation")) {
String orientation = req.getParameter("Orientation");
if (orientation.equalsIgnoreCase("V")) {
bar.orientation = PlotOrientation.VERTICAL;
} else if (orientation.equalsIgnoreCase("H")) {
bar.orientation = PlotOrientation.HORIZONTAL;
}
map.remove("Orientation");
//out.println("<br>Orientation : " + orientation);
}
// set the lower and upper range
if (map.containsKey("Range")) {
String rangeArray[] = (String[]) req.getParameter("Range").split(",");
bar.lower = new Double(rangeArray[0]);
bar.upper = new Double(rangeArray[1]);
map.remove("Range");
//out.println("<br>Range : " + range);
}
// get the chart data from an XML file or...
if (map.containsKey("XMLFile")) {
URL url = getClass().getResource(req.getParameter("XMLFile"));
try
{
java.io.InputStream inputstream = url.openStream();
bar.dataset = (DefaultCategoryDataset) DatasetReader.readCategoryDatasetFromXML(inputstream);
}
catch(IOException ioexception)
{
System.out.println(ioexception.getMessage());
}
map.remove("XMLFile");
} else {
// get the data
for (Iterator<Entry<String, String[]>> it=map.entrySet().iterator(); it.hasNext(); ) {
Map.Entry entry = it.next();
String key = (String) entry.getKey();
//out.println("<br>Key : " + key);
String value[] = (String[]) entry.getValue();
for (int i=0;i != value.length;i++) {
String data[] = value[i].split(",");
bar.dataset.setValue(new Double(data[1]),key,data[0]);
//out.println(" Value : " + value[i] + "Data : " + data[0]);
}
}
}
JFreeChart chart = bar.getChart();
return chart;
}
/**
* Create XY chart method.
*
* @param map which can consist of elements such as:
* <ul>
* <li> Type - the type of chart: either Bar, Step, Area, Line, Scatter, or Time.</li>
* <li> Title - the title of the chart.</li>
* <li> XLabel - the domain title.</li>
* <li> YLabel - the range title.<li>
* <li> Orientation - the orientation of the chart, either H or V.<li>
* <li> Range - the upper and lower value of the range. Format is Range=lower,upper, e.g. Range=68,72.</li>
* <li> data - the data to plot. Format is name=value&name=value, eg: Fish=70&Chips=66.</li>
* </ul>
* @param req which is the Http Servlet Request
*
* @return JFreeChart
* @throws ServletException
*
*/
private JFreeChart createXY(Map<String, String[]> map, HttpServletRequest req)
throws ServletException {
XYChart xy = new XYChart();
// set the title for the Category Chart
if (map.containsKey("Title")) {
xy.title = req.getParameter("Title");
map.remove("Title");
}
// what type? (default is Bar)
if (map.containsKey("Type")) {
String type = req.getParameter("Type");
if (type.equalsIgnoreCase("Bar")) {
xy.type = XYChart.TYPEBAR;
} else if (type.equalsIgnoreCase("Step")) {
xy.type = XYChart.TYPESTEPAREA;
} else if (type.equalsIgnoreCase("Area")) {
xy.type = XYChart.TYPEAREA;
} else if (type.equalsIgnoreCase("Line")) {
xy.type = XYChart.TYPELINE;
} else if (type.equalsIgnoreCase("Scatter")) {
xy.type = XYChart.TYPESCATTER;
//} else if (xyType.equalsIgnoreCase("Polar")) {
//xy.type = XYChart.TYPEPOLAR;
} else if (type.equalsIgnoreCase("Time")) {
xy.type = XYChart.TYPETIME;
}
map.remove("Type");
}
// set the range
if (map.containsKey("XLabel")) {
xy.xLabel = req.getParameter("XLabel");
map.remove("XLabel");
}
// set the domain
if (map.containsKey("YLabel")) {
xy.yLabel = req.getParameter("YLabel");
map.remove("YLabel");
}
// set the orientation
if (map.containsKey("Orientation")) {
String orientation = req.getParameter("Orientation");
if (orientation.equalsIgnoreCase("V")) {
xy.orientation = PlotOrientation.VERTICAL;
} else if (orientation.equalsIgnoreCase("H")) {
xy.orientation = PlotOrientation.HORIZONTAL;
}
map.remove("Orientation");
//out.println("<br>Orientation : " + orientation);
}
// set the lower and upper range
if (map.containsKey("Range")) {
String rangeArray[] = (String[]) req.getParameter("Range").split(",");
xy.lower = new Double(rangeArray[0]);
xy.upper = new Double(rangeArray[1]);
map.remove("Range");
//out.println("<br>Range : " + range);
}
// get the data
for (Iterator<Entry<String, String[]>> it=map.entrySet().iterator(); it.hasNext(); ) {
Map.Entry entry = it.next();
String key = (String) entry.getKey();
//out.println("<br>Key : " + key);
String value[] = (String[]) entry.getValue();
if (xy.type == XYChart.TYPETIME) {
TimeSeries timeSeries = new TimeSeries(key,Second.class);
SimpleDateFormat sdf = new SimpleDateFormat("HH:mm:ss");
Date date = null;
for (int i=0;i != value.length;i++) {
String data[] = value[i].split(",");
try {
date = sdf.parse(data[0]);
} catch (ParseException pe) {
throw new ServletException(pe.getMessage());
}
timeSeries.add(new Second(date),new Double(data[1]));
//out.println(" Value : " + value[i]);
}
xy.timeset.addSeries(timeSeries);
} else {
XYSeries xySeries = new XYSeries(key);
for (int i=0;i != value.length;i++) {
String data[] = value[i].split(",");
xySeries.add(new Double(data[0]),new Double(data[1]));
//out.println(" Value : " + value[i]);
}
xy.dataset.addSeries(xySeries);
}
}
JFreeChart chart = xy.getChart();
return chart;
}
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