Db4o activation query depth, more than 5 layers

// Check the data stored in db4o
Embeddedobjectcontainer EOC = (embeddedobjectcontainer) servletactioncontext
. Getservletcontext (). getattribute (
Db4oservletcontextlistner. key_db4o_server );
// Obtain the role corresponding to the user and the selected application
Objectset OS = EOC. querybyexample (AM );
If (OS. Size () apph. setfault ("configuration error, application [". Concat (appname). Concat ("] menu not found! "));
} Else if (OS. Size () = 1 ){
Applicationmenu AMS = OS. Get (0 );

// The following statement activation depth
EOC. Activate (AMS, 10 );
Apph. setsucess ();
Body. setdata ("Menus", AMS );
} Else {

apph. setfault ("XXXXXXXX! ");
}