On Fri, Apr 1, 2011 at 10:56 AM, Mushfaque Chowdhury
<mushfaque.chowdh...@googlemail.com> wrote:
> Hi
>
> I'm trying to solve a introspection problem of the following type
>
> (def Region {'fields '((datatype x) (datatype y))})
>
> (def Country {'fields '((int x) (double y {reference `Region}))})
>
> I'd like to introspect the fields from Country and see {reference
> Region} replaced by (reference ((datatype x) (datatype y)))
>
> I can get as far as seeing this
>
> ((nth (nth (Country 'fields) 1) 2) 'reference)
> which gives
> (quote com.test.Common/Region)
>
> which is sort of close, but how do I now look at it's fields?
First of all, that's not actually a class, it's a var.
Second, does it actually need to be quoted a second level?
Third, (second '(quote com.test.Common/Region)) will be the symbol
com.test.Common/Region, and if you get that symbol into a local named
foo, (ns-resolve *ns* foo) ought to yield up a Var object.
And (@that-var 'fiels} then ought to cough up '((datatype x) (datatype y)).
Indeed:
user=> (def Region {'fields '((datatype x) (datatype y))})
#'user/Region
user=> (def Country {'fields '((int x) (double y {reference `Region}))})
#'user/Country
user=> (@(ns-resolve (find-ns 'user) (nth ((nth (nth (Country 'fields)
1) 2) 'reference) 1)) 'fields)
((datatype x)
(datatype y))
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