gwt - RequestFactory's Entity Relationships -

the details of request's with() implementation of requestfactory in gwt bit unclear me. see here the official documentation.

question 1:

when querying server, requestfactory not automatically populate relations in object graph. this, use with() method on request , specify related property name string.

does mean if entity @ server uses lazy fetching, returned entityproxy have requested objects specified in with()? seems bit odd instantiate whole object graph of object server side, send small piece client.

question 2:

does req.with("foo").with("foo"); same req.with("foo"); ?

question 3:

does req.with("foo").with("bar"); same req.with("foo","bar"); ?

note: i'm having hard time finding implementation details of with() in source code , api doesn't me either.

question 1:

it depends on server side implemenation. with invocation make sure corresponding getter (getfoo()) called shortly before rf call returns client.

that's reason why have make sure use opensessioninview pattern, otherwise might run nullpointeterexceptions.

question 2:

i guess request<t> implements builder pattern. end-result same. not sure if getter() called twice or if with method check if getter requested.

question 3:

yes it's same.

as sidenote. can use req.with("foo.bar"). on backend lead getfoo().getbar() call.