private void extendOptionsIfNecessary() {
// don't add null or empty string, only for list types
if (!canExtendOptions()) {
return;
}
// find the correct option
SettingDto listValuesOption = getSettingByName(FORM_VALUES);
// add the value
if (listValuesOption != null) {
if (listValuesOption.getValue() instanceof List) {
// copy current values to avoid running into unmodifiable lists
List listValues = new ArrayList((List) listValuesOption.getValue());
// for lists, we add all not included
if (List.class.isAssignableFrom(value.getClass())) {
for (Object objectFromValueList : (List) value) {
if (!listValues.contains(objectFromValueList.toString())) {
listValues.add(objectFromValueList);
}
}
// a case for single select comboboxes, just add the value
} else {
if (!listValues.contains(value.toString())) {
listValues.add(value);
}
}
listValuesOption.setValue(listValues);
}
}
}
private boolean isMultiSelect() {
SettingDto setting = getSettingByName(MULTISELECT);
return setting != null && Boolean.TRUE.equals(setting.getValue());
}