iRule for URI Switching Nested Inside of Hostname Switching

Is it possible to nest URI switching inside hostname switching? If so, does someone have any links or suggestions I can try? I found a hostname switching example (below, after uri example). However, instead of switching to a pool, i would like the irule to switch to code that URI switches. Instead of "pool site1_pool" in the hostname switching example below, I would like to know if you can replace "pool site1_pool" with something similar to this:

 

URI switching example

when HTTP_REQUEST {

 

switch -glob [string tolower [HTTP::uri] ] {

 

"/path1/file.jpg" { pool POOLNAME1 }

 

"/path2/file.jpg" { pool POOLNAME2 }

 

default { drop } } }

 

hostname switching example

when HTTP_REQUEST {

 

 Check requested host header (set to lowercase) 
switch [string tolower [HTTP::host]] { 

   "www.site1.com" { 
      pool site1_pool 
   } 
   "www.site2.com" { 
      pool site2_pool 
   } 
   default { 
      pool default_pool 
   } 
} 

}