I have a graph component written in javascript using the canvas. You can update its values if you pass it a valid json array, of dates, coupled with prices of that date (stock trading candlesticks).
The jsonArray I try to populate on this call usually comes from creating new dates in js - but is there a way to send my jsonArray down the wire (from Primefaces) in such a way that the dates get interpreted as dates?
When I use
PrimeFaces.current().executeScript("myFunction(" + jsonObject.toString() + ")");
Dates that come down the wire are becoming long looking numbers which I guess are the number of milliseconds since 1970. What can I do to send this (rather large) jsonarray and have its dates interpreted as dates? (they fail on the date.getMonth() call, because they are numbers instead of dates).
When creating the jsonArray on the server side, I do the following, which looks wrong because getTime() returns a long. So how would dates be properly handled here?
json.addProperty("date", data.getKey().getTs().getTime());
The function getting called with the long values as dates was the following. As Ultimater suggested, pass this object through new Date() - which should work for a date object - as well as a long, so no harm done!
dateToString(date, multiline) {
if(date === null)
return;
// Added this
date = new Date(date);
var datestr = date.getMonth() + " " + date.getDay() + ", " + date.getFullYear();