XYToolTipGenerator generator
                        = getToolTipGenerator(series, item);
                    if (generator != null) {
                        tip = generator.generateToolTip(dataset, series, item);
                    }
                    String url = null;
                    if (getURLGenerator() != null) {
                        url = getURLGenerator().generateURL(dataset, series,
                                item);
                    }
                    XYItemEntity entity = new XYItemEntity(shape, dataset,
                            series, item, tip, url);
                    entities.add(entity);