How to create a custom ResultSet?

[mgbf]

I saw in the docs and some posts (like http://forums.smartclient.com/showpo...62&postcount=4) that it's possible to customize the resultset class used by a datasource.

I read the following in the resultset javadocs, but I didn't understand.

(...)
All ResultSets for a given DataSource may also be customized via setting resultSetClass to the name of a ResultSet com.smartgwt.client.util.isc#defineClass in which com.smartgwt.client..Class#addProperties.
(...)

So could any of you please give me an example of how to do that? I need a custom datasource so that I can pass extra parameters to fetch operation.

Thanks,
Matheus