CDA datasource - server-side filtering

Hi all,

I'm developing new CDF component, which uses data from CDA datasource. This component should work with large amount of data (like milions), so server-side processing is requested. I found that CDA datasources support server-side pagination and sorting by passing of parameters to the CDA query (parameters are: sortBy, pageSize and pageStart, so I can call ajax request like this: http://domain/pentaho/content/cda/doQuery?dataAccessId=AccessID&pageSize=15&pageStart=0&sortBy=2D&sortBy=0A&path=pathToCDA_file)

My question is: Is possible to do the filtering on the server-side in similar way?

I found this link: http://grepcode.com/file/repository....utputStream%29
and it looks like, that no parameter for filtering exists, does it?

Do you have any idea how to do the server-side filtering in the CDA-datasource? Only possible solution that I see is to add my own parameter to the query, but I do not like it, because it is not independent on the type of the CDA datasource (different syntax).

I' ll be thankful for any Idea.

Thanks in advance,
Honza