How to pass array of array (list of list) to view in play framework 2.x?

Question

I have been trying it for sometime and I have to create view for complex frontend application. This looks like I am able to send array list like:

In Controller :

ArrayList<String> cname = new ArrayList<>();
cname.add("akshay");
cname.add("david");

And in View :

@(cname: List[String])

But, now I have to create an array of this array. This could be other data structure as well like List, but for now I have to pass an array of array, which looks like :

ArrayList<ArrayList<String>> arr = new ArrayList<>();

What type should be view then ? Below is not working :

@(cname : List[List[String]])

Any reference to tutorial/guide for such arrays for future reference would be much helpful.

Edit :

I need to pass ArrayList of ArrayList. The program in question is :

while(rs.next())
        {
            cname = rs.getString("customername");
            cmobile = rs.getString("customermobile");
            amount = rs.getString("billamount");

            namearr.add(cname);
            mobilearr.add(cmobile);
            amountarr.add(amount);

        }
        rowsArray.add(mobilearr);
        rowsArray.add(namearr);
        rowsArray.add(amountarr);

And I have to send rowsArray to front. I know using this kind of queries is abuse of Play Framework, but in this case, I had to go as native as possible. Is there any otherway I can send such data to frontend except JPA ? Is it possible that I create a class with these arrays and then in my controller create array of objects and send it to view ?

Can u answer this please stackoverflow.com/questions/29433509/… — Sumeet Hiremath
– Sumeet Hiremath, Commented Apr 5, 2015 at 11:10

Schleichardt · Accepted Answer · 2013-10-15 20:04:08Z

2

You need the fully qualified class names since Scala has its own list type that shadows the Java list or is not imported automatically.

Use

@(cname : java.util.List[java.util.List[String]])

for

List<List<String>> arr = new ArrayList<>();

or

@(cname : java.util.ArrayList[java.util.ArrayList[String]])

for

ArrayList<ArrayList<String>> arr = new ArrayList<>();

But the code could be more cleaner if you use types (new classes) for your data.

edited Oct 15, 2013 at 20:04

answered Oct 14, 2013 at 18:19

Schleichardt

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1 Comment

akshayb Over a year ago

so this should be applied for Collections as well.

i.am.michiel · Accepted Answer · 2013-10-14 07:44:42Z

0

List references to the scala type : List and not the java super type java.util.List. I have never used the Java version of Playframework but you should try to pass : ArrayList[ArrayList[String]].

answered Oct 14, 2013 at 7:44

i.am.michiel

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