Thank you Paul for your reply.
FYI - I use Map not to use DTO - I put all properties (Long, Date) to
this Map.
So I have another question --- is it any way to define what kind of
objects (Date, Long, Double, etc.) can show in Map. I found
information @gwt.typeArgs <something>.
I mean - is it possible to add to the remote interface information
about all serializaed types which can be in Map? - to solve this
problem
Thanks,
Krisw
On 11 Mar, 17:55, Paul Robinson <ukcue...@gmail.com> wrote:
> kriswpl wrote:
> > Interface method is:
> > public Map<String, Object> test();
>
> > and in implementation I put into returned map, object java.util.Long
> > (which is serializable:) ):
> > map.put("long", new Long(1));
>
> > Where do I do it wrong?
>
> GWT does a great job of putting as little into the javascript as
> possible. In the above case, there's nothing to tell it that you're
> going to send a Long, so it doesn't generate the RPC code into the
> javascript that knows how to deserialize a Long. Add another method that
> references Long, and then your first method might work because the Long
> code is now going to be included.
>
> On a related note, using Map in the API is not a good idea because it
> means GWT must look through all your code for every implementation of
> Map to see whether it's used. At the very least, it will make compiles
> take longer. At worst, it will generate longer code. It goes against the
> grain for java programming, but you need to make GWT RPC APIs as
> specific as possible. That means declaring that you're returning a
> HashMap, not a Map, in the interface.
>
> This also means you can't declare Object as a type in an RPC interface.
>
> Paul
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