Select2 JSON Format for tree structure using ajax - jquery-select2

Question

I am trying to develop tree structure using jquery select2 plugin with ajax call that returns json format.I implemented it using struts 2.
my code is as follows
In script section
<script>
$(document).ready(function(){
var id=1;
$('#sub_lessons').select2({
minimumInputLength: 3,
maximumSelectionSize: 1,
multiple: true,
ajax: {
url: 'getData.action?lid='+id,
dataType: 'jsonp',
quietMillis: 100,
data: function(term, page) {
return {
q: term,
page_limit: 10,
page: page
};
},
results: function(data, page) {
return {
results: data,
more:false
};
}
},
formatResult: function(data) {
return data.text;
},
formatSelection: function(data) {
return data.text;
},
dropdownCssClass: "bigdrop",
escapeMarkup: function(m) {
return m;
}
});
});
</script>
and in body part
<select id="sub_lessons" class="form-control select2" multiple>
</select>
Here the action is not being called . If The action calls it retuns the following json String
[{"children":[{"children":[{"children":[],"id":15,"text":"algebra 3"}],"id":3,"text":"one one one"}],"id":1,"text":"another ones"},{"children":[{"children":[],"id":14,"text":"ratios"}],"id":6,"text":"lesson one"},{"children":[],"id":8,"text":"one 1"},{"children":[],"id":12,"text":"algebra 2"},{"children":[],"id":13,"text":"lesson 2"},{"children":[],"id":16,"text":"lesson 232"}]
The action is not being called. json format displays in select box something like
1
1.1
1.1.1
1.2
1.2.1
1.2.2
1.3
1.4
Now i want to implement the same using select 2 plug in.
is it possible to possible to do so?
if so please help me to implement this. I could not understand where I am doing wrong.
any help would be appreciated.

Answer 1

It's seems like only the following style ,
http://jsbin.com/wicutoti/20/edit
and i found some topic related to how to customising select2's dropdown
https://groups.google.com/forum/#!msg/select2/S0b-JJJIFYY/il-MYOFdGusJ
it points to not support the tree structure at present
In that thread, about trees: "not yet, something im working on for 4.0". And then: "Support for trees has probably been shelved for 4.0", says Igor and Kevin, the main Select2 developers (it seems, looking at the GitHub stats).