Hi guys, i try to explain my problem.
I use spring mvc framework (jsp + controller) i need to visualize different numbers of columns in my jsp, based on logged user role
i paste my code:

JSON object from controller response

[code]
{"iTotalDisplayRecords":10,
"iTotalRecords":10,
"sEcho":1,
"aaData":[{"numeroPolizza":"aaaa",
"codiceVoucher":"bbbbbbbbbb",
"codicePratica":"72",
"brand":"ccccc",
"attivita":"dddddddd",
"data":"05/02/2013",
"status":"Non Elaborata",
"statusImpianto":"N/D",
"agenzia":"eeeeeeee",
"ldapUsername":"fffffffffff",
"id":123,
"action":{
"revoke":true,
"edit":true,
"open":true,
"reprint":true}}
]}
[/code]

JSP page:

[code]
$(function() {
var oTable = $('#tableArchive').dataTable({
"bProcessing" : true,
"bJQueryUI" : true,
"bServerSide": true,
"sPaginationType" : "full_numbers",
"sAjaxSource" : "/prod-doAjaxCall.htm",
"aoColumns": [
{ "mData": "numeroPolizza", "sName": "numeroPolizza", "bSortable": true, "bVisible": true },
{ "mData": "codiceVoucher", "sName": "codiceVoucher", "bSortable": true, "bVisible": true },
{ "mData": "codicePratica", "sName": "codicePratica", "bSortable": true, "bVisible": true },
{ "mData": "brand", "sName": "brand", "bSortable": false, "bVisible": true },
{ "mData": "attivita", "sName": "attivita", "bSortable": false, "bVisible": true },
{ "mData": "data", "sName": "data", "bSortable": true, "bVisible": true },
{ "mData": "status", "sName": "status", "bSortable": false, "bVisible": true },
{ "mData": "statusImpianto", "sName": "statusImpianto", "bSortable": false, "bVisible": true },
{ "mData": "id", "sName": "id", "bSortable": false, "bVisible": false },
{ "mData": "action", "sName": "action","bSortable": false,"bVisible": true, "sClass": "archiveAction",
"mRender": function ( data, type, full ) {
//JAVASCRIPT LOGIC
},
{ "mData": "agenzia", "sName": "agenzia", "bSortable": false, "bVisible": true},
{ "mData": "utente", "sName": "agenzia", "bSortable": false, "bVisible": true},
]
});
});




numeroPolizza
codiceVoucher
codicePratica
brand
attivita
data
status
statusImpianto

action
agenzia
utente







[/code]

a number of aoColumns and my TH columns will be different as user role for example:

User_A will see the first 3 columns of aoColumns and the relative TH column
User_B will see the first 6 columns of aoColumns and the relative TH column
User_C can see all columns

I can make TH column dynamical visualization using Spring Security tag but i have no idea how to generate aoColumns dynamically