CategoryToolTipGenerator tipster = getToolTipGenerator(row, column);
if (tipster != null) {
tip = tipster.generateToolTip(dataset, row, column);
}
String url = null;
CategoryURLGenerator urlster = getItemURLGenerator(row, column);
if (urlster != null) {
url = urlster.generateURL(dataset, row, column);
}
CategoryItemEntity entity = new CategoryItemEntity(
hotspot, tip, url, dataset, row,
dataset.getColumnKey(column), column
);