public static String getSimplePieChart(Map dataSource, String objectName, HttpSession session)
throws Throwable {
DefaultPieDataset dataset = new DefaultPieDataset();
Element chartObject =
XMLHandler.getElementByAttribute(getChartObjectList(), "name", objectName);
String title = chartObject.getAttributeValue("title");
int width = Integer.parseInt(chartObject.getAttributeValue("width"));
int height = Integer.parseInt(chartObject.getAttributeValue("height"));
Element LabelKeys = chartObject.getChild("Labels");
Element ValueKeys = chartObject.getChild("Values");
String valueKey = ValueKeys.getText();
String valueType = ValueKeys.getAttributeValue("type");
List labelKeys = LabelKeys.getChildren("Label");
String labelKey = LabelKeys.getText();
if (valueType.equalsIgnoreCase("number")) {
for (int i = 0; i < dataSource.size(); i++) {
Map rec = (Map) dataSource.get("ROW" + i);
Number value = (Number) rec.get(valueKey);
String label;
if (labelKeys.isEmpty()) {
label = DataFilter.show(rec, labelKey);
} else {
label = ((Element) labelKeys.get(i)).getText();
}
dataset.setValue(label, value);
}
} else {
for (int i = 0; i < dataSource.size(); i++) {
Map rec = (Map) dataSource.get("ROW" + i);
double value = (Double) rec.get(valueKey);
String label;
if (labelKeys.isEmpty()) {
label = DataFilter.show(rec, labelKey);
} else {
label = ((Element) labelKeys.get(i)).getText();
}
dataset.setValue(label, value);
}
}
JFreeChart chart =
ChartFactory.createPieChart3D(
title,
dataset,
chartObject.getAttribute("showLegend").getBooleanValue(),
chartObject.getAttribute("showToolTips").getBooleanValue(),
chartObject.getAttribute("urls").getBooleanValue());
PiePlot3D pie3dplot = (PiePlot3D) chart.getPlot();
float alpha = 0.7F;
if (chartObject.getAttribute("alpha") != null) {
alpha = chartObject.getAttribute("alpha").getFloatValue();
}
pie3dplot.setForegroundAlpha(alpha);
return ServletUtilities.saveChartAsPNG(chart, width, height, null, session);
}
private static List getChartObjectList() {
Element root = XMLHandler.openXML(CONFIGFILE);
return root.getChildren("Object");
}