Ooo.. will definitely check this out.

I'd gone to using semi-generic JavaScriptObjects on the client side, and 
"closely" matching server side objects.. and then had Spring 3.0 w/ Jackson 
handle the server side marshalling in 2 directions.

Thanks Johan

Roger

On Jan 28, 2010, at 4:53 AM, Johan Rydberg wrote:

> Have you guys checked the http://github.com/chirino/resty-gwt project?  It 
> has a generator
> that does pretty much all the "awful" things Roger talks about.
> 
> On 1/28/10 9:14 AM, Abdullah Shaikh wrote:
>> Hi Roger,
>> 
>> Then the only option left is xml, of course if we are not going GWT-RPC way.
>> 
>> So what do you think will be better JSON or XML ?
>> 
>> I have created a GWT application, the communication with server part is 
>> pending, the server side is java but its an already existing application, so 
>> I need to hook something in between the service side application & GWT to 
>> communicate, so I am looking out if it should be json or xml.
>> 
>> 
>> - Abdullah
>> 
>> On Wed, Jan 27, 2010 at 5:11 PM, Roger Studner <rstud...@gmail.com 
>> <mailto:rstud...@gmail.com>> wrote:
>> 
>>    And to add one thing.
>> 
>>    Using JSON w/ GWT is well.. "awful".
>> 
>>    The main reason for this, is that you get JSON back to the client,
>>    and either use Overlay Types (can't use instanceof with there, and
>>    about 500 other issues).. or you hve to take a "simple"
>>    OverlayType and then re-instantiate all of your objects (i.e. you
>>    do eval() once on the JSON, then for-loop etc to re-instantiate
>>    objects from that JSONObject).
>> 
>>    And then, the joy doesn't stop.  When you want to say, post JSON
>>    back to the server, you have to redo this process, converting all
>>    the "java objects" (which are of course actually javascript) into
>>    JSON.
>> 
>>    All in all, using JSON w/ GWT is a very (very) painful experience.
>> 
>>    THe humor of course, is that you have to convert objects "to and
>>    from Java" so that you can then use all the "java" API's etc that
>>    GWT (just converts into Javascript).
>> 
>>    Heh
>> 
>>    Roger
>> 
>>    On Jan 27, 2010, at 1:30 AM, Jan Ehrhardt wrote:
>> 
>>>    The problem is the GWT RPC's serialization, which can't work with
>>>    objects created by hibernate. You can use the DTO Grails plugin
>>>    (http://www.grails.org/plugin/dto) or you can use JSON / REST for
>>>    communication.
>>> 
>>>    In the case of a Grails app, which comes with great support for
>>>    REST / JSON, I would prefer the second way.
>>> 
>>>    Regards
>>>    Jan Ehrhardt
>>> 
>>>    On Wed, Jan 27, 2010 at 4:37 AM, Don Ruby, R&amp;D
>>>    <donald.r...@mindspring.com <mailto:donald.r...@mindspring.com>>
>>>    wrote:
>>> 
>>>        GWT is the obvious choice for UI. But if you want to use
>>>        Grails/Groovy
>>>        for server side, you have to either code messy DTOs or client
>>>        side
>>>        POJOs.  It would be nice if GWT would support using the
>>>        Grails/Groovy
>>>        domain objects directly on the client.  Any chance of that
>>>        happening?
>>> 
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