public static void legendAction() {
try {
LegendColorTable.countTable = 0;
Layer layer = content.layers().get(content.layers().size() - 1);
SimpleFeatureSource featureSource = (SimpleFeatureSource) layer.getFeatureSource();
String fieldName = getFieldForColour(featureSource);
if (fieldName != null && fieldName.length() > 0) {
Style style = createStyle(featureSource, fieldName);
content.removeLayer(layer);
Layer newLayer = new FeatureLayer(featureSource, style);
content.addLayer(newLayer);
} else throw new NullPointerException("Error occured during making legend");
} catch (ArrayIndexOutOfBoundsException ex) {
JOptionPane.showMessageDialog(null, "No layers are added !");
} catch (Exception ex) {
ex.printStackTrace();
// JOptionPane.showMessageDialog(null, ex.getMessage());
}
}
