i have the same question and i found this:
http://mail-archives.apache.org/mod_mbox//incubator-cloudstack-dev/201301.mbox/%3ccanlssbxhw5fhwrn3bs+yoj6ycpbbdu1khjzq4ncaa59fqfa...@mail.gmail.com%3E
seems this annotation is used for converting entity UUID->ID
-Mice
2013/1/28 Kelven Yang <kelven.y...@citrix.com>:
> I have a question about a change in @Parameter at API layer, in regards to
> entityType, does anyone know the reason behind why it has to go through
> with some Response class which in turn declares links to the entity class
> via @EntityReference annotation?
>
> And in DeployVMCmd as an example, there is also another special field
> (ipToNetworkList) declares entity reference directly, could someone
> clarify it?
>
> @ACL(checkKeyAccess=true)
> @Parameter(name = ApiConstants.IP_NETWORK_LIST, type =
> CommandType.MAP, entityType={Network.class, IpAddress.class},
> description = "ip to network mapping. Can't be specified with
> networkIds parameter." +
> " Example:
> iptonetworklist[0].ip=10.10.10.11&iptonetworklist[0].networkid=uuid -
> requests to use ip 10.10.10.11 in network id=uuid")
> private Map ipToNetworkList;
>
> Kelven
>
>
