jData in a WebService

Hello,
I want to use the import/export functionnality of Jahia in a WebService.
 
I've got a function that make it well, but this function is called in
Jahia context.
Then it uses the jData parameters.
 
And my question is :
can jData parameter be instantiate outside jahia context an servlet
context ?
 
If yes, how ?
 
 
Thanks in advance.
Ertu