How to access HashMap values in java script method?

Question

Here is my java code

public HashMap<Integer, Integer> getNoOfWidgetsFromUsername(final String username) //vikas- method to get pid from db.
{
HashMap<Integer, Integer> obMap = new HashMap<Integer, Integer>();
int numwidgets=getTotalWidgetsOfUser(PartnerID);
obMap.put(new Integer(1),PartnerID);
obMap.put(new Integer(2),numwidgets);
return obMap;
}

I put the above code in a function. I am calling that function from Javascript and returning values to Javascript.

Here is my Javascript code.

JSClientService.getNoOfWidgetsFromUsername(username, {
callback : function(data) {
//here i want to print hashmap values.
}
});

How can I access the data on the Javascript side?

what technology are you using in your frontend? A java servlet? — vcetinick
– vcetinick, Commented Apr 26, 2012 at 4:46
what is JSCLientService ? Which library you are using for that. Please add tag. — Rakesh Juyal
– Rakesh Juyal, Commented Apr 26, 2012 at 4:47

Srikanth Kshatriy · Accepted Answer · 2012-04-26 05:51:41Z

2

It is a Java object, so you can not access it in javascript (i guess data will be undefined in your case).

Convert your java object to JSON object (something like this)

JSONObject json = new JSONObject();
json.put("res",obmap);

then in your js callback function ()

callback : function(data) {
  data = JSON.parse(data);
  for(var i in data.res){
      console.log(i); //key
      console.log(data.res[i]); //value  
  }
}

code not tested

answered Apr 26, 2012 at 5:51

Srikanth Kshatriy

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