Refresh suggestion list on change - cn1 autocomplete - autocomplete

Question

I've implemented a custom autocomplete text field in a cn1 app, but I've noticed it only loads the suggestions list once, after that any change in the text doesn't trigger a change in the list, and the getSuggestionModel() is never called again. How can I achieve this (in my mind, basic) functionality?
This is my autocomplete class:
public class ForumNamesAutocomplete extends AutoCompleteTextField {
List<String>suggestions = new LinkedList<String>();
List<Map<String,Object>> fData;
StateMachine mac;
int currentIndex;
String prevText;
public static final String KEY_FORUM_NAME = "name";
public static final String KEY_FORUM_ID = "id";
public static final String KEY_FORUM_DESC = "desc";
public ForumNamesAutocomplete(StateMachine sm){
super();
mac = sm;
if(sm.forumData != null){
fData = mac.forumData;
}
}
#Override
protected boolean filter(String text) {
if(text.equals(prevText)){
return false;
}
setSuggestionList(text);
fireDataChanged(DataChangedListener.CHANGED, text.length());
prevText = text;
return true;
}
#Override
public void fireDataChanged(int type, int index) {
super.fireDataChanged(type, index);
}
public void setSuggestionList(String s){
if(suggestions == null){
suggestions = new LinkedList<String>();
}else{
suggestions.clear();
}
LinkedList<String> descList = new LinkedList<String>();
for(int i = 0;i<fData.size();i++){
boolean used = false;
Map<String,Object> forumMap = fData.get(i);
if(((String)forumMap.get(KEY_FORUM_NAME)).indexOf(s) != -1){
suggestions.add((String)forumMap.get(KEY_FORUM_NAME));
used = true;
}
if(!used && ((String)forumMap.get(KEY_FORUM_DESC)).indexOf(s) != -1){
descList.add((String)forumMap.get(KEY_FORUM_NAME));
}
}
suggestions.addAll(descList);
}
#Override
protected ListModel<String> getSuggestionModel() {
return new DefaultListModel<String>(suggestions);
}
}

Answer 1

This used to be simpler and seems to be a bit problematic now as explained in this issues.
Technically what you need to do is return one model and then mutate said model/fire modified events so everything will refresh. This is non-trivial and might not work correctly for all use cases so ideally we should have a simpler API to do this as we move forward.

Answer 2

After additional debugging, I saw that the getSuggestionModel() method was being called only during initialization, and whatever the suggestion list (in suggestion object) was at that point, it remained so. Instead I needed to manipulate the underlying ListModel object:
public class ForumNamesAutocomplete extends AutoCompleteTextField {
ListModel<String>myModel = new ListModel<String>();
...
#Override
protected boolean filter(String text) {
if(text.length() > 1){
return false;
}
setSuggestionList(text);
return true;
}
private void setSuggestionList(String s){
if(myModel == null){
myModel = new ListModel<String>();
}else{
while(myModel.getSize() > 0)
myModel.removeItem(0);
}
for(int i = 0;i<fData.size();i++){
boolean used = false;
Map<String,Object> forumMap = fData.get(i);
if(((String)forumMap.get(KEY_FORUM_NAME)).indexOf(s) != -1){
myModel.addItem((String)forumMap.get(KEY_FORUM_NAME));
used = true;
}
if(!used && ((String)forumMap.get(KEY_FORUM_DESC)).indexOf(s) != -1){
myModel.addItem((String)forumMap.get(KEY_FORUM_NAME));
}
}
}
...
}