Implement additional XML readers - Issue

Inspiration on http://www.jfree.org/phpBB2/viewtopic.php?f=3&t=28009

    public class CustomDatasetReader extends DatasetReader {

       public static XYDataset readXYDatasetFromXML(InputStream in) throws IOException {
          XYDataset result = null;
          SAXParserFactory factory = SAXParserFactory.newInstance();
          try {
             SAXParser parser = factory.newSAXParser();
             XYDatasetHandler handler = new XYDatasetHandler();
             parser.parse(in, handler);
             result = handler.getDataset();
          } catch (SAXException e) {
             System.out.println(e.getMessage());
          } catch (ParserConfigurationException e2) {
             System.out.println(e2.getMessage());
          }
          return result;

       }
    }

and

    public class XYDatasetHandler extends RootHandler implements DatasetTags {
        public void addItem(Comparable rowKey, Comparable columnKey, Number value) {
          TimeSeries timeSeries = this.dataset.getSeries(rowKey);
          if (timeSeries == null) {
             timeSeries = new TimeSeries(rowKey);
             this.dataset.addSeries(timeSeries);
          }

          try {
             timeSeries.add(new Day(dateFormat.parse(columnKey.toString())), value);
          } catch (ParseException exc) {
             // just in case the date format is wrong.
             timeSeries.add(new Day(), value);
             System.out.println("Date format is incorrect: " + columnKey);
          }
        }
    }