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Passing javascript object containing another array of objects to localStorage and then to java servlet using ajax

I am trying to work out how to store a javascript object in local storage that has a few items as well as an array of objects, if that is possible. To then extract the data from the local storage and send to a java servlet using ajax, then extract the data from the java HttpServletRequest. Here is some of the code I have written. It's a bit too complex to put the entire code base here. I have multiple forms which a user completes and as they move between forms I store the data entered into local storage.
const object = localStorage.getItem(scenarioName);
let scenarioObject = JSON.parse(object);
if (formIsValid) {
scenarioObject.SUPER_BALANCE = 420000;
scenarioObject.SUPER_INVESTMENT_FEES = 0.14;
scenarioObject.SUPER_ADMIN_FEES = 120;
scenarioObject.LIFE_INSURANCE = 200000;
scenarioObject.ANNUAL_LUMP_SUM_SUPER_CONTRIBUTION = 1500;
let objectString = JSON.stringify(scenarioObject);
localStorage.setItem(scenarioName, objectString);
}
To extract the data from local storage I do the following:
const object = localStorage.getItem(activeScenario);
const jsonString = JSON.parse(object);
const yourSuperBalance = jsonString.SUPER_BALANCE;
$("#your-super-balance").val(yourSuperBalance);
const yourInvestmentFees = jsonString.SUPER_INVESTMENT_FEES;
$("#super-investment-fees").val(yourInvestmentFees);
const yourSuperAdminFees = jsonString.SUPER_ADMIN_FEES;
$("#super-admin-fees").val(yourSuperAdminFees);
const yourInsurance = jsonString.LIFE_INSURANCE;
$("#life-insurance").val(yourInsurance);
const yourAnnualSuperContribution = jsonString.ANNUAL_LUMP_SUM_SUPER_CONTRIBUTION;
$("#your-annual-lump-sum-super-contribution").val(yourAnnualSuperContribution);
This all works fine, but now I wanted to add an array of objects from a table. I could not figure out a way to add this so I ended up storing two items in local storage. One for all the form data and one for the table data. I didn't like this approach but couldn't get it to work otherwise. Here is how I did the table:
function getSuperContributionsTableDataString(table) {
let yourSuperContributionsTableData = [];
let jsonData;
// commence for loop at 1 because the first row will be the header row and we want to skip that
for (let i = 1; i < table.rows.length; i++) {
let row = table.rows[i];
// first check all cells in row have a value, if not ignore
if (row.cells[0].innerText !== "" && row.cells[1].innerText !== "" && row.cells[2].innerText !== "") {
// As we are pushing the last element pushed becomes the first element in the array
// therefore, we push the before or after tax first and age last
jsonData = {};
jsonData[SUPER_TAXATION_CONTRIBUTION] = row.cells[2].innerText;
jsonData[SUPER_AMOUNT_CONTRIBUTION] = row.cells[1].innerText;
jsonData[SUPER_AGE_CONTRIBUTION] = row.cells[0].innerText;
yourSuperContributionsTableData.push(jsonData);
}
}
return JSON.stringify(yourSuperContributionsTableData);
}
let superContributionsTableDataString = getSuperContributionsTableDataString(
document.getElementById("your-extra-super-contributions-table"));
localStorage.setItem(scenarioName+ANNUAL_LUMP_SUM_SUPER_CONTRIBUTION, superContributionsTableDataString);
This all worked but then I had to figure out how to send this data to the server using ajax. Without the table, everything was working fine as follows:
function sendScenarioDetailsToServer() {
let activeScenario = localStorage.getItem(ACTIVE_SCENARIO_KEY);
let item = localStorage.getItem(activeScenario);
let passedData = JSON.parse(item);
$.ajax({
type: "POST",
url: "ScenarioServlet",
data: passedData,
success: function (data) {
const SUCCESS_INT = data.length - 1;
if (data[SUCCESS_INT].SUCCESS === FAIL) {
displayPopupMessage("Error saving scenario ", "Save Scenario");
}else {
displayResult();
}
},
error: function (error, status) {
console.log(`Error ${error}`);
const stackTrace = getStackTrace();
const message = "An error occurred sending your data to the server for calculation. ";
displayPopupMessage(message, "Server Error.", stackTrace);
}
});
}
I modified this function as follows to add the table data and everything in the java servlet code went wrong.
function sendScenarioDetailsToServer() {
let activeScenario = localStorage.getItem(ACTIVE_SCENARIO_KEY);
let item = localStorage.getItem(activeScenario);
let passedData = JSON.parse(item);
// superannuation table
const superTable = activeScenario+ANNUAL_LUMP_SUM_SUPER_CONTRIBUTION;
// this is already stringified
const superTableItem = localStorage.getItem(superTable);
const superTableData = '&' + ANNUAL_LUMP_SUM_SUPER_CONTRIBUTION + "=" + superTableItem;
const formData = passedData + superTableData;
console.log("formData " + formData);
$.ajax({
type: "POST",
url: "ScenarioServlet",
data: passedData + superTableData,
success: function (data) {
const SUCCESS_INT = data.length - 1;
if (data[SUCCESS_INT].SUCCESS === FAIL) {
// TODO display messages
displayPopupMessage("Error saving scenario ", "Save Scenario");
}else {
displayResult();
}
},
error: function (error, status) {
console.log(`Error ${error}`);
const stackTrace = getStackTrace();
const message = "An error occurred sending your data to the server for calculation. ";
displayPopupMessage(message, "Server Error.", stackTrace);
}
});
}
Can anyone advise how best to store a javascript object in local storage that has an item inside the object which is an array of objects for a table? How do I store this in local storage, retrieve it from local storage, send it to the java servlet using ajax and then retrieve it from the HttpServletRequest. Any assistance would be much appreciated.

I worked out a way to do this. I shall fully explain the situation and then my solution to the problem. Not sure if this is the best solution but it does work.
The situation is that I have multiple forms where the user enters data for calculations, including a table of data. I wanted to store this data on local storage for later retrieval next time the user uses the website. The calculations are done in Java on the server so when the user clicks on something like "calculate" the data in local storage is then sent to the server to perform the calculations and the result is sent back.
I needed to store a javascript object containing some elements plus a table, so basically a javascript object with an array inside it.
Collect data from the table
function getSuperContributionsTableDataString(table) {
let yourSuperContributionsTableData = [];
let jsonData;
// commence for loop at 1 because the first row will be the header row and we want to skip that
for (let i = 1; i < table.rows.length; i++) {
let row = table.rows[i];
// first check all cells in row have a value, if not ignore
if (row.cells[0].innerText !== "" && row.cells[1].innerText !== "" && row.cells[2].innerText !== "") {
// As we are pushing the last element pushed becomes the first element in the array
// therefore, we push the before or after tax first and age last
jsonData = {};
jsonData[SUPER_TAXATION_CONTRIBUTION] = row.cells[2].innerText;
jsonData[SUPER_AMOUNT_CONTRIBUTION] = row.cells[1].innerText;
jsonData[SUPER_AGE_CONTRIBUTION] = row.cells[0].innerText;
yourSuperContributionsTableData.push(jsonData);
}
}
return yourSuperContributionsTableData;
}
Where I went wrong with this originally was I stringified the array. As the entire javascript object is going to be stringified this was unnecessary.
Create javascript object and store in local storage
The first step is to extract the item from local storage to update it with the new data from the user. Notice we must parse the object because it was originally stringified.
Secondly set the user entered data on the javascript object. You will notice the call to the function above that retrieves the table data. That table data is set as a key value pair in the javascript object.
const scenarioName = localStorage.getItem(ACTIVE_SCENARIO_KEY);
const object = localStorage.getItem(scenarioName);
let scenarioObject = JSON.parse(object);
isValid = validateYourSuperannuationForm();
if (isValid) {
let superContributionsTableDataString = getSuperContributionsTableDataString(
document.getElementById("your-extra-super-contributions-table"));
scenarioObject.SUPER_BALANCE = $("#your-super-balance").val();
scenarioObject.SUPER_INVESTMENT_FEES = $("#super-investment-fees").val();
scenarioObject.SUPER_ADMIN_FEES = $("#super-admin-fees").val();
scenarioObject.LIFE_INSURANCE = $("#life-insurance").val();
scenarioObject.ANNUAL_LUMP_SUM_SUPER_CONTRIBUTION = $("#your-annual-lump-sum-super-contribution").val();
scenarioObject.EXTRA_SUPER_CONTRIBUTIONS_TABLE_DATA = superContributionsTableDataString;
let objectString = JSON.stringify(scenarioObject);
localStorage.setItem(scenarioName, objectString);
}
Send item in local storage to server
I discovered trying to stringify the entire javascript object caused problems at the server. What I had to do was create a new object for the formData to be sent to the server, BUT I had to stringify only the table data, not the entire object. I had to retrieve each item from local storage and set it on the formData object to be passed to the server.
function sendScenarioDetailsToServer() {
const activeScenario = localStorage.getItem(ACTIVE_SCENARIO_KEY);
const item = localStorage.getItem(activeScenario);
const scenarioObject = JSON.parse(item);
// We must do this because if superContributionsTableData == "" and we then stringify this it will
// end up with a value of """", which will cause an error.
const superContributionsTableData = scenarioObject.EXTRA_SUPER_CONTRIBUTIONS_TABLE_DATA;
let superContributionsTableDataString = "";
if (superContributionsTableData !== ""){
superContributionsTableDataString = JSON.stringify(superContributionsTableData);
}
const formData = {
SCENARIO_NAME: scenarioObject.SCENARIO_NAME,
DATE_OF_BIRTH: "",
IS_SINGLE: scenarioObject.IS_SINGLE,
IS_RETIRED: scenarioObject.IS_RETIRED,
RETIREMENT_DATE: scenarioObject.RETIREMENT_DATE,
IS_HOMEOWNER: scenarioObject.IS_HOMEOWNER,
FORTNIGHTLY_RENT: scenarioObject.FORTNIGHTLY_RENT,
DATE_RENT_CEASES: scenarioObject.DATE_RENT_CEASES,
IS_SINGLE_AND_SHARING: scenarioObject.IS_SINGLE_AND_SHARING,
SPOUSE_DATE_OF_BIRTH: scenarioObject.SPOUSE_DATE_OF_BIRTH,
IS_SPOUSE_RETIRED: scenarioObject.IS_SPOUSE_RETIRED,
SPOUSE_RETIREMENT_DATE: scenarioObject.SPOUSE_RETIREMENT_DATE,
SUPER_BALANCE: scenarioObject.SUPER_BALANCE,
SUPER_INVESTMENT_FEES: scenarioObject.SUPER_INVESTMENT_FEES,
SUPER_ADMIN_FEES: scenarioObject.SUPER_ADMIN_FEES,
LIFE_INSURANCE: scenarioObject.LIFE_INSURANCE,
ANNUAL_LUMP_SUM_SUPER_CONTRIBUTION: scenarioObject.ANNUAL_LUMP_SUM_SUPER_CONTRIBUTION,
EXTRA_SUPER_CONTRIBUTIONS_TABLE_DATA: superContributionsTableDataString
}
$.ajax({
type: "POST",
url: "ScenarioServlet",
data: formData,
success: function (data) {
// do stuff here
{
},
error: function (error, status) {
console.log(`Error ${error}`);
const stackTrace = getStackTrace();
const message = "An error occurred sending your data to the server for calculation. ";
displayPopupMessage(message, "Server Error.", stackTrace);
}
});
In the Java Servlet the data is then extracted from the HttpServletRequest passed to the doPost method. It is retrieved in the usual way by calling HttpServletRequest.getParameter. Converting the table data is a little more complex because it is an array that was converted to a string. I am including an extract of that code in case it is of use to someone.
ArrayList<LumpSumSuperContribution> superContributionsList = new ArrayList<>();
String superContributionsTableData = request.getParameter(EXTRA_SUPER_CONTRIBUTIONS_TABLE_DATA);
// Array superContributionsArray = request.getParameter(EXTRA_SUPER_CONTRIBUTIONS_TABLE_DATA);
JSONObject superContributionsMessage = new JSONObject();
boolean errorOccurred = false;
if (superContributionsTableData != null && superContributionsTableData.length() > 0) {
try {
JSONArray superContributionsArray = new JSONArray(superContributionsTableData);
int i = 0;
while (i < superContributionsArray.length()) {
JSONObject contributionObj = (JSONObject) superContributionsArray.get(i);
String ageString = (String) contributionObj.get(SUPER_AGE_CONTRIBUTION);
Validator.WholeNumberResult result6 = Validator.validateMandatoryWholeNumber(ageString, 18, 99,
"Lump Sum Super Contribution age for row " + (i + 1));
if (!result6.getErrorMessage().equals(SUCCESS)) {
superContributionsMessage.put(EXTRA_SUPER_CONTRIBUTIONS_TABLE_DATA, result6.getErrorMessage());
messageArray.put(superContributionsMessage);
errorOccurred = true;
break;
}
Integer age = result6.getNumber();
String contributionAmountString = (String) contributionObj.get(SUPER_AMOUNT_CONTRIBUTION);
Validator.WholeNumberResult result7 = Validator.validateMandatoryWholeNumber(
contributionAmountString, 1, 9999999,
"Lump Sum Super Contribution amount for row " + (i + 1));
if (!result7.getErrorMessage().equals(SUCCESS)) {
superContributionsMessage.put(EXTRA_SUPER_CONTRIBUTIONS_TABLE_DATA, result7.getErrorMessage());
messageArray.put(superContributionsMessage);
errorOccurred = true;
break;
}
Integer amount = result7.getNumber();
String beforeAfterTaxString = (String) contributionObj.get(SUPER_TAXATION_CONTRIBUTION);
Validator.TextResult result8 = Validator.validateMandatoryText(beforeAfterTaxString,
"Lump Sum Super Contribution Before or After Tax for row " + (i + 1), 5, 6);
if (!result8.getErrorMessage().equals(SUCCESS)) {
superContributionsMessage.put(EXTRA_SUPER_CONTRIBUTIONS_TABLE_DATA, result8.getErrorMessage());
messageArray.put(superContributionsMessage);
errorOccurred = true;
break;
}
String beforeAfterTax = result8.getText();
LumpSumSuperContribution superContribution = new LumpSumSuperContribution(age, amount, false,
LumpSumSuperContribution.YOUR_CONTRIBUTION, beforeAfterTax);
superContributionsList.add(superContribution);
i++;
}
if (!errorOccurred) {
scenario.setAllYourSuperContributions(superContributionsList);
// superContributionsMessage.put(EXTRA_SUPER_CONTRIBUTIONS_TABLE_DATA, SUCCESS);
} else {
fail = true;
superContributionsMessage.put(EXTRA_SUPER_CONTRIBUTIONS_TABLE_DATA, FAIL);
messageArray.put(superContributionsMessage);
}
} catch (JSONException e) {
throw new RuntimeException(e);
}
}else {
scenario.setAllYourSuperContributions(null);
}
}
Summary
Create a javascript array. Then loop through the table data and create a javascript object for each row of the table and push onto the array.
Create or retrieve javascript object stored in local storage. If already in local storage, this object must be parsed using JSON.parse(object).
Set the details on the object entered by the user.
Stringify the javascript array and add the string to the object as a key value pair.
To send the data to the server retrieve the item from local storage and parse the item to extract details from it.
Set the extracted details on a newly created formData object.
Stringify the table data and set as a key value pair in formData.
Using ajax Post the data to the server.
I hope this helps someone in the future. It took me a while of trying different things to find a way to get this to work. If anyone has a better solution please post it.

PHP POST: Setting data variables dynamically from an array

Hi all I'm pretty new to PHP and AJAX and all that good stuff and I'm a little stumped on how to proceed from here in my code.
I have a form that is getting sent and I have an array (subcategories) which contains the form labels to retrieve the values of the fields. The fields and values are getting created dynamically based on a textfile that the user uploads so I don't have any way of knowing what they are.
var arrayLength = subcategories.length;
for (var i = 0; i < arrayLength; i++) {
var eachfield = subcategories[i];
//Do something
//#C: selector is working fine, cleaning input
var eachfield = $('#' + eachfield).val().trim();
//push the appropriate values with the fixed stuff to a new array
values.push(eachfield);
}
What I'm trying to do is now to set these variables to some name and send them through $data using AJAX and POST.
Something like the following if I was setting everything statically.
var data = {
dimitypedata: dimitype,
densitydata: density,
velocitydata: velocity,
temperaturedata: temperature,
submitbtnclicked: "submitted"
};
//using the data and sending it through a post with promise handling
$.ajax({
type: 'POST',
url: "controller.php",
data: data,
success: function(response) {
//alert("worked");
//console.log(response);
alert(response);
},
error: function() {
alert("There was an error submitting the information");
}
});
I'm not quite sure how to mix these two and it may be partially because of getting a confused and not yet being that great with POST and AJAX calls.
EDIT: It looks like my question was a bit unclear (sorry first post lol) I'm trying to dynamically push values that I take out of an HTML form field. The problem is that the form is generated depending on what the user chooses to upload to the site (so both the fields and the forms. My ultimate goal is to enable the user to edit the dynamically generated form based on a text file that they upload and be able to generate a new text file after editing it on the GUI after clicking on the submit button. I can do this if its static but I'm having trouble figuring out how to do the same if I don't know what the form will contain.
I'm trying to to my data object so I can use it in my AJAX call. Here's a little bit of the PHP code that I would use in the next step if the variables were static:
if(isset($_POST['submitbtnclicked']) && $_POST['submitbtnclicked'] == 'submitted') {
//new instance of model for use
$model = new model();
$dimitypedata = $_POST['dimitypedata'];
$densitydata = $_POST['densitydata'];
$velocitydata = $_POST['velocitydata'];
$temperaturedata = $_POST['temperaturedata'];

For an exact answer, we need to see what the "subcategories" array look like.
If I understood correctly, you would like to put the values in an object instead of an array (values). So the first part would look like:
var data = {};
var arrayLength = subcategories.length;
for (var i = 0; i < arrayLength; i++) {
//notice that now field name and field value go in separate variables
var fieldName = subcategories[i];
//#C: selector is working fine, cleaning input
var fieldValue = $('#'+eachfield).val().trim();
//push the appropriate values with the fixed stuff to a data object
data[fieldName] = fieldValue;
}
//and then you send your gathered data
//using the data and sending it through a post with promise handling
$.ajax({
type: 'POST',
url: "controller.php",
data: data,
success: function(response) {
//alert("worked");
//console.log(response);
alert(response);
},
error: function() {
alert("There was an error submitting the information");
}
});

If you want to generate your 'data' object using 'values' variable, you can do the next:
values = []; // here your values collected previously
var data = {};
for (var key in values){
data[key] = values[key];
}
//now you can use your data in AJAX

ServiceNow UI Page GlideAjax

I created a form using UI Page and am trying to have some fields autopopulated onChange. I have a client script that works for the most part, but the issue arises when certain fields need to be dot-walked in order to be autopopulated. I've read that dot-walking will not work in client scripts for scoped applications and that a GlideAjax code will need to be used instead. I'm not familiar with GlideAjax and Script Includes, can someone help me with transitioning my code?
My current client script looks like this:
function beneficiary_1(){
var usr = g_user.userID;
var related = $('family_member_1').value;
var rec = new GlideRecord('hr_beneficiary');
rec.addQuery('employee',usr);
rec.addQuery('sys_id',related);
rec.query(dataReturned);
}
function dataReturned(rec){
//autopopulate the beneficiary fields pending on the user selection
if(rec.next()) {
$('fm1_ssn').value = rec.ssn;
$('fm1_address').value = rec.beneficiary_contact.address;
$('fm1_email').value = rec.beneficiary_contact.email;
$('fm1_phone').value = rec.beneficiary_contact.mobile_phone;
var dob = rec.date_of_birth;
var arr = dob.split("-");
var date = arr[1] + "/"+ arr[2] + "/" + arr[0] ;
$('fm1_date_of_birth').value = date;
}
}
fm1_address, fm1_email, and fm1_phone do not auto populate because the value is dot walking from the HR_Beneficiary table to the HR_Emergency_Contact table.
How can I transform the above code to GlideAjax format?

I haven't tested this code so you may need to debug it, but hopefully gets you on the right track. However there are a couple of steps for this.
Create a script include that pull the data and send a response to an ajax call.
Call this script include from a client script using GlideAjax.
Handle the AJAX response and populate the form.
This is part of the client script in #2
A couple of good websites to look at for this
GlideAjax documentation for reference
Returning multiple values with GlideAjax
1. Script Include - Here you will create your method to pull the data and respond to an ajax call.
This script include object has the following details
Name: BeneficiaryContact
Parateters:
sysparm_my_userid - user ID of the employee
sysparm_my_relativeid - relative sys_id
Make certain to check "Client callable" in the script include options.
var BeneficiaryContact = Class.create();
BeneficiaryContact.prototype = Object.extendsObject(AbstractAjaxProcessor, {
getContact : function() {
// parameters
var userID = this.getParameter('sysparm_my_userid');
var relativeID = this.getParameter('sysparm_my_relativeid');
// query
var rec = new GlideRecord('hr_beneficiary');
rec.addQuery('employee', userID);
rec.addQuery('sys_id', relativeID);
rec.query();
// build object
var obj = {};
obj.has_value = rec.hasNext(); // set if a record was found
// populate object
if(rec.next()) {
obj.ssn = rec.ssn;
obj.date_of_birth = rec.date_of_birth.toString();
obj.address = rec.beneficiary_contact.address.toString();
obj.email = rec.beneficiary_contact.email.toString();
obj.mobile_phone = rec.beneficiary_contact.mobile_phone.toString();
}
// encode to json
var json = new JSON();
var data = json.encode(obj);
return data;
},
type : "BeneficiaryContact"
});
2. Client Script - Here you will call BeneficiaryContact from #1 with a client script
function onChange(control, oldValue, newValue, isLoading, isTemplate) {
if (isLoading || newValue === '') {
return;
}
var usr = g_user.userID;
var related = $('family_member_1').value;
var ga = new GlideAjax('BeneficiaryContact'); // call the object
ga.addParam('sysparm_name', 'getContact'); // call the function
ga.addParam('sysparm_my_userid', usr); // pass in userID
ga.addParam('sysparm_my_relativeid', related); // pass in relative sys_id
ga.getXML(populateBeneficiary);
}
3. Handle AJAX response - Deal with the response from #2
This is part of your client script
Here I put in the answer.has_value check as an example, but you may want to remove that until this works and you're done debugging.
function populateBeneficiary(response) {
var answer = response.responseXML.documentElement.getAttribute("answer");
answer = answer.evalJSON(); // convert json in to an object
// check if a value was found
if (answer.has_value) {
var dob = answer.date_of_birth;
var arr = dob.split("-");
var date = arr[1] + "/"+ arr[2] + "/" + arr[0];
$('fm1_ssn').value = answer.ssn;
$('fm1_address').value = answer.address;
$('fm1_email').value = answer.email;
$('fm1_phone').value = answer.mobile_phone;
$('fm1_date_of_birth').value = date;
}
else {
g_form.addErrorMessage('A beneficiary was not found.');
}
}

Parse retrieve pointer from current user in javascript

In Parse I have the User table set up with a number of columns, most of which are Strings but one is a Pointer to another Parse Class. I want to use this pointer in a query
In Java I can access the pointer to use in my query as follows:
ParseUser currentUser = ParseUser.getCurrentUser();
ParseObject comParent = currentUser.getParseObject("ComParent");
In JavaScript I have tried using:
var currentUser = Parse.User.current();
var comParent = currentUser.get("ComParent");
But this returns undefined. What am I doing wrong?

According to the documentation:
"By default, when fetching an object, related Parse.Objects are not fetched. These objects' values cannot be retrieved until they have been fetched like so:"
var post = fetchedComment.get("parent");
post.fetch({
success: function(post) {
var title = post.get("title");
}
});
So you should write:
var currentUser = Parse.User.current();
var comParent = currentUser.get("ComParent");
comParent.fetch({
success: function(comParent) {
var name = comParent.get("Name");
alert(name); // this one will work
}
});
alert(comParent.get("Name")); // this one wont work, see below
Just remember that success is an asynchronous callback,as such comParent will not be available outside the success function as shown above, if you need to access comParent outside of success check out https://stackoverflow.com/a/27673839/1376624

Thanks. My issue was a combination of 2 things. Firstly, I was not correctly fetching the object as you rightly point out. Secondly, I was trying to fetch an object from a user which did not have an associated ComParent object (Doh!). Anyway, your solution put me onto the need to fetch the object but I don't think it is the currentUser that should have the fetch, it is comParent:
var currentUser = Parse.User.current();
var comParent = currentUser.get("ComParent");
comParent.fetch({
success: function(comParent) {
var name = comParent.get("Name");
alert(name);
}
});
Thanks again #DelightedD0D

google maps store locator modify hardcoded initialization to dynamic

I'm trying to modify this example
http://storelocator.googlecode.com/git/examples/panel.html
the javascript code is here:
https://gist.github.com/2725336
the aspect I'm having difficulties with is changing this:
MedicareDataSource.prototype.FEATURES_ = new storeLocator.FeatureSet(
new storeLocator.Feature('Wheelchair-YES', 'Wheelchair access'),
new storeLocator.Feature('Audio-YES', 'Audio')
);
to create the FeatureSet from a function, so for example I have this function which parses a JSON object
WPmmDataSource.prototype.setFeatures_ = function(json) {
var features = [];
// convert features JSON to js object
var rows = jQuery.parseJSON(json);
// iterate through features collection
jQuery.each(rows, function(i, row){
var feature = new storeLocator.Feature(row.slug + '-YES', row.name)
features.push(feature);
});
return new storeLocator.FeatureSet(features);
};
so then change the first code snippet to something like
WPmmDataSource.prototype.FEATURES_ = this.setFeatures_(wpmm_features);
which returns an error:
Uncaught TypeError: Object [object Window] has no method 'setFeatures_'

I think you just have to make some changes to the WPmmDataSource.prototype and your setFeatures_ method:
WPmmDataSource.prototype = {
FEATURES_ : null,
setFeatures_ : function( json ) {
//Set up an empty FEATURES_ FeatureSet
this.FEATURES_ = new storeLocator.FeatureSet();
//avoid the use of "this" within the jQuery loop by creating a local var
var featureSet = this.FEATURES_;
// convert features JSON to js object
var rows = jQuery.parseJSON( json );
// iterate through features collection
jQuery.each( rows, function( i, row ) {
featureSet.add(
new storeLocator.Feature( row.slug + '-YES', row.name ) );
});
}
}
And with this, you don't have to do the assignment by returning a value from setFeatures_; it has direct access to the FEATURES_ member. So the line:
WPmmDataSource.prototype.FEATURES_ = this.setFeatures_(wpmm_features);
is no longer necessary. This also means that later, when you have created an instance of WPmmDataSource, your code can work like this:
var wpmd = new WPmmDataSource( /* whatever options, etc. you want */ );
wpmd.setFeatures_( json );
// Thereafter, wpmd will have its FEATURES_ set
I'm not exactly sure what you are trying to achieve, but I believe this will get you over the hurdle of your current stall. I hope this gets you moving forward -