Re: If there is no nil values, why do I get null pointer exception?

[Gary Verhaegen]

I would guess the NPE comes from the form (xml/emit-str
(xml/map->Element next-movie-as-map)), given that (conj nil nil) does
not throw.

Perhaps try to isolate the problem in a smaller chunk of code, and
then file a bug with the data.xml library?

On 21 March 2013 19:16, larry google groups <lawrencecloj...@gmail.com> wrote:
>
> I am getting a null pointer exception in the line where I conj into the
> vector. I added the pprint so I could see what was going on. I am confused
> by the outcome:
>
> (defn convert-json-to-xml [json-as-flat-maps]
>   (reduce
>    (fn [vector-of-strings next-movie-as-map]
>      (println "next move as map: ")
>      (println (pp/pprint next-movie-as-map))
>      (if (seq next-movie-as-map)
>        (conj vector-of-strings (xml/emit-str (xml/map->Element
> next-movie-as-map)))
>        vector-of-strings))
>    []
>    json-as-flat-maps))
>
> The pprint is showing me this:
>
> {:film_64209.9096316473 "513e67e3c07f5dd745000051",
>  :cast_member_64209.9096316473 "5148c50dc07f5db42300003a",
>  :title_64209.9096316473 "Sound design",
>  :director "",
>  :runtime "5",
>  :movie-id "513e67e3c07f5dd745000051",
>  :title "Two Islands",
>  :thumb
>
> "https://s3.amazonaws.com/tribeca_cms_production/uploads/uploads/film/photo_1/513e67e3c07f5dd745000051/small_TWO_ISLANDS_2_pubs.jpg";,
>  :categories ["Documentary"],
>  :youtube_url "",
>  :website_url "",
>  :name_64209.9096316473 "Svante Colérus",
>  :description
>  "Two Islands is film about two enormous waste dumps in New York City. The
> first was once the largest dump in the world. The other, a cemetery of
> unknowns, is still in use. Two Islands bluntly asks, what does the existence
> of these two huge mountains of economic and social waste and rejected
> surplus tell us about our civilization and the so-called richest nation in
> the world? What kind of legacy will future archaeologists see?"}
>
>
> Any thoughts about what triggers a null pointer exception? I am using this
> XML library:
>
> http://clojure.github.com/data.xml/
>
>
>
>
>
>
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