public String generateBarChart(
String hitSection, HttpSession session, PrintWriter pw, String courseId, int studentId) {
/* int groupId=0;
if (groupName.equals("All")){
groupId=0;
}else{
groupId = studStatisticBean.getGroupIdByName(groupName);
}*/
String filename = null;
try {
// Retrieve list of WebHits
StudentsConceptChartDataSet cDataSet =
new StudentsConceptChartDataSet(studStatisticBean, courseId, studentId);
ArrayList list = cDataSet.getDataBySection(hitSection);
// Throw a custom NoDataException if there is no data
if (list.size() == 0) {
System.out.println("No data has been found");
throw new NoDataException();
}
// Create and populate a CategoryDataset
Iterator iter = list.listIterator();
DefaultCategoryDataset dataSet = new DefaultCategoryDataset();
while (iter.hasNext()) {
StudentsConceptHit wh = (StudentsConceptHit) iter.next();
// Comparable c1= Double.parseDouble(wh.getHitDegree());
dataSet.addValue(
wh.getHitDegree(),
"degree of mastery for concept ",
String.valueOf(wh.getHitConcept()));
}
// Create the chart object
CategoryAxis categoryAxis = new CategoryAxis("Concepts");
ValueAxis valueAxis = new NumberAxis("Degree of Mastery");
valueAxis.setRange(0.0, 6.0);
categoryAxis.setCategoryLabelPositions(
new CategoryLabelPositions().createUpRotationLabelPositions(45));
BarRenderer renderer = new BarRenderer();
renderer.setDrawBarOutline(true);
renderer.setItemURLGenerator(
new StandardCategoryURLGenerator("xy_chart.jsp", "series", "section"));
StandardCategoryToolTipGenerator scttg = new StandardCategoryToolTipGenerator();
renderer.setToolTipGenerator(scttg);
Plot plot = new CategoryPlot(dataSet, categoryAxis, valueAxis, renderer);
JFreeChart chart = new JFreeChart("", JFreeChart.DEFAULT_TITLE_FONT, plot, true);
chart.setBackgroundPaint(java.awt.Color.white);
// Write the chart image to the temporary directory
ChartRenderingInfo info = new ChartRenderingInfo(new StandardEntityCollection());
filename = ServletUtilities.saveChartAsPNG(chart, 600, 400, info, session);
// Write the image map to the PrintWriter
ChartUtilities.writeImageMap(pw, filename, info);
pw.flush();
} catch (NoDataException e) {
System.out.println(e.toString());
filename = "public_nodata_500x300.png";
} catch (Exception e) {
System.out.println("Exception - " + e.toString());
e.printStackTrace(System.out);
filename = "public_error_500x300.png";
}
return filename;
}
public String generateXYChart(
String section, HttpSession session, PrintWriter pw, String courseId, int studentId) {
/*int groupId=0;
if (groupName.equals("All")){
groupId=0;
}else{
groupId = studStatisticBean.getGroupIdByName(groupName);
}*/
String filename = null;
try {
// Retrieve list of WebHits
StudentsConceptChartDataSet cDataSet =
new StudentsConceptChartDataSet(studStatisticBean, courseId, studentId);
ArrayList list = cDataSet.getDataByHitConcept(section);
// Throw a custom NoDataException if there is no data
if (list.size() == 0) {
System.out.println("No data has been found");
throw new NoDataException();
}
// Create and populate an XYSeries Collection
XYSeries dataSeries = new XYSeries("Students progress line");
Iterator iter = list.listIterator();
while (iter.hasNext()) {
StudentsConceptHit ch = (StudentsConceptHit) iter.next();
dataSeries.add(ch.getOrdNumb(), ch.getHitDegree());
}
XYSeriesCollection xyDataset = new XYSeriesCollection(dataSeries);
NumberFormat nf = NumberFormat.getIntegerInstance();
NumberFormat nf2 = NumberFormat.getInstance();
String cTitle = null;
// StandardXYToolTipGenerator ttg = new
// StandardXYToolTipGenerator(StandardXYToolTipGenerator.DEFAULT_TOOL_TIP_FORMAT,nf,nf2);
CustomXYToolTipGenerator ttg = new CustomXYToolTipGenerator();
ttg.addToolTipSeries(cDataSet.getConceptNames());
StandardXYURLGenerator sxyUrlGen =
new StandardXYURLGenerator("#", xyDataset.getSeriesName(0), "PassedConceptOrdNum");
ValueAxis ordNumAxis = new NumberAxis("Concept ordinal number");
NumberAxis valueAxis = new NumberAxis("Current knowledge");
// valueAxis.setAutoRangeIncludesZero(true);
valueAxis.setRange(0.0, 6.0); // override default
ordNumAxis.setAutoRange(true);
ordNumAxis.setLowerMargin(0.0);
StandardXYItemRenderer renderer =
new StandardXYItemRenderer(
StandardXYItemRenderer.LINES + StandardXYItemRenderer.SHAPES, ttg, sxyUrlGen);
Marker marker = new ValueMarker(1.50); // /
Marker marker2 = new ValueMarker(2.50);
Marker marker3 = new ValueMarker(3.50);
Marker marker4 = new ValueMarker(4.50);
Marker marker5 = new ValueMarker(5.00);
renderer.setShapesFilled(true);
XYPlot plot = new XYPlot(xyDataset, ordNumAxis, valueAxis, renderer);
plot.addRangeMarker(marker);
plot.addRangeMarker(marker2);
plot.addRangeMarker(marker3);
plot.addRangeMarker(marker4);
plot.addRangeMarker(marker5);
XYTextAnnotation xyBad = new XYTextAnnotation("Bad", 1, 1);
xyBad.setX(0.2);
xyBad.setY(0.75);
XYTextAnnotation xyNotBad = new XYTextAnnotation("Not Bad", 1, 1);
xyNotBad.setX(0.2);
xyNotBad.setY(2);
XYTextAnnotation xyGood = new XYTextAnnotation("Good", 1, 1);
xyGood.setX(0.2);
xyGood.setY(3);
XYTextAnnotation xyVeryGood = new XYTextAnnotation("Very Good", 1, 1);
xyVeryGood.setX(0.2);
xyVeryGood.setY(4);
XYTextAnnotation xyExcellent = new XYTextAnnotation("Excellent", 1, 1);
xyExcellent.setX(0.2);
xyExcellent.setY(4.75);
XYTextAnnotation xyExpert = new XYTextAnnotation("Expert", 1, 1);
xyExpert.setX(0.2);
xyExpert.setY(5.25);
plot.addAnnotation(xyBad);
plot.addAnnotation(xyNotBad);
plot.addAnnotation(xyGood);
plot.addAnnotation(xyVeryGood);
plot.addAnnotation(xyExcellent);
plot.addAnnotation(xyExpert);
JFreeChart chart = new JFreeChart("", JFreeChart.DEFAULT_TITLE_FONT, plot, true);
chart.setBackgroundPaint(java.awt.Color.white);
// Write the chart image to the temporary directory
ChartRenderingInfo info = new ChartRenderingInfo(new StandardEntityCollection());
filename = ServletUtilities.saveChartAsPNG(chart, 600, 400, info, session);
// Write the image map to the PrintWriter
ChartUtilities.writeImageMap(pw, filename, info);
pw.flush();
} catch (NoDataException e) {
System.out.println(e.toString());
filename = "public_nodata_500x300.png";
} catch (Exception e) {
System.out.println("Exception - " + e.toString());
e.printStackTrace(System.out);
filename = "public_error_500x300.png";
}
return filename;
}