Parsing a Map object to client...

General
1

Hi all,

I’m trying to send some data across to the client from my server by using the following code inside the
paintContent(PaintTarget target)
 method.

target.addAttribute("mymap", map);

But when I try to read the map that I passed from the
updateFromUIDL(UIDL uidl, ApplicationConnection client)
 method, what I’m getting is a
ValueMap
.

ValueMap map = uidl.getMapAttribute("mymap"); // This is not a java.util.Map

I have already asked the same question in the below link & the reply that I got is related to serialization & de-serialization of Strings.

http://vaadin.com/forum/-/message_boards/message/203445

My concern is to get the same map that I passed from the server side.
Is there a way to accomplish this?

Any help is greatly appreciated.

Thanks,
Asela.

2

Even though the client side implementation is different, the contents should be the same that you send. Use getString/getInt/getBoolean or similar depending on what type of data you have put in your map.

3

Hi Artur,

Thanks for the quick reply. I do have a question about the following.

What if I’m using
my own Objects
 as the values for the map?

Map<Long, MyObject> map = new HashMap<Long, MyObject>();
map.put(1L, new MyObject(long, String, ArrayList,... some other objects));

Do I have to write a de-serialization class in the client side as mentioned in the previous thread by
John Ahlroos
?

http://vaadin.com/forum/-/message_boards/message/203445

Thanks,
Asela.

4

If you are using other types of objects you need to serialize/deserialize them manually. Hopefully this will be improved in Vaadin 7.