On Tuesday, June 11, 2013 10:56:13 AM UTC+2, stuckagain wrote:
>
> Hi,
>
> I am working on a fix for this issue: 
> https://code.google.com/p/google-web-toolkit/issues/detail?id=8083
>
> I am avoiding converting from string to the internal format of BigInteger 
> because it has a big performance impact on IE8 when sending it over RPC. It 
> performs much better in IE9 and other browsers, but still I want to 
> optimize this since this is having a major impact in an application I am 
> working on (And I saw some other people in the banking industry having 
> similar issues with BigDecimal).
>
> In many cases this data is never modified in the client, so I am delaying 
> the actual parsing of the String to the internal format of BigInteger. 
>
> Is it feasible to have custom field serializers depending on running in 
> the client or server ?
>
> The question I am asking is because I don't want to break the 
> BigInteger(String) constructor that will throw exceptions when you feed it 
> a non parseable string. so my solution would be to use a static method or 
> custom constructor for BigInteger when deserializing on the client. But 
> this method is not available in the real java.math.BigInteger class. 
>
> So is it possible to have different client and server 
> serializers/deserializer code for RPC ?
>

Yes, and there are many ways of doing so.

You can use super-sources to provide two implementations of the same class 
(with the added benefit that the super-source'd version can be 
@GwtScriptOnly so it's not used in DevMode where you'll also use a 
different implementation of BigDecimal and BigInteger)
You can have a ServerCustomFieldSerializer that's used only on server-side.
Or, but it's a hack, you can extend CustomFieldSerializer and have 
different implementations for the instance methods (used on the server) and 
the static methods (used on the client).

Have a look at what exists already, I'm sure you'll find examples of the 
above first 2 options to guide you into choosing the most appropriate one 
(my gut feeling would be super-source).

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