private static String getFieldForColour(SimpleFeatureSource source) throws Exception {
String selectedField = new String();
String[] fieldNames = new String[source.getSchema().getAttributeCount()];
int k = 0;
for (AttributeDescriptor desc : source.getSchema().getAttributeDescriptors()) {
fieldNames[k++] = desc.getLocalName();
}
selectedField =
JOptionPane.showInputDialog(
null,
"Choose an attribute for colouring",
"Feature attribute",
JOptionPane.PLAIN_MESSAGE,
null,
fieldNames,
fieldNames[0])
.toString();
return selectedField;
}
