Hi Hasan, I don't have a generic order for keys, my order is the same of the fields in select list: select <col1>, <col2>, ..., <coln> from ... when the resultset of this query is mapped, values in the map are inserted in this order <col1>, <col2>, ..., <coln>. I'd like that map.keySet().iterator() let me iterate over values in that order, i.e. insertion-order. This is a custom order but I have to parse the query to get it. I think it should be the order that a client would expect. >From the LinkedHashMap javadoc: "This implementation spares its clients from the unspecified, generally chaotic ordering provided by HashMap<http://docs.oracle.com/javase/6/docs/api/java/util/HashMap.html> (and Hashtable< http://docs.oracle.com/javase/6/docs/api/java/util/Hashtable.html>), without incurring the increased cost associated with TreeMap<http://docs.oracle.com/javase/6/docs/api/java/util/TreeMap.html>
On Sun, Dec 18, 2011 at 7:46 PM, Hasan Diwan <hasan.di...@gmail.com> wrote: > On 18 December 2011 10:31, aris2world <aris2wo...@gmail.com> wrote: > > I've a question about CaseInsensitiveHashMap in BasicRowProcessor: it > > extends HashMap but if it will extend LinkedHashMap I think the resulting > > Map could seem more consistent with the executed query to a client > > perspective. > > I mean: when the method toMap puts the columns of the resultset into the > > map, the insertion order is the same of the columns in the select list of > > the executed query. It will be useful to me to extract values in the same > > order when I'm iterating over the key set of the returned map. This is > > accomplished in a simply way with a LinkedHashMap. What do you think > about > > it? > > I think you should be able to (untested): > HashMap<String, Object> map = basicRowProcessorInstance.toMap(); > List <String> keys = new ArrayList(map.keySet()); > Collections.sort(keys); > now keys will be sorted alphabetically by String's default Comparator, > but you can also specify a custom one. > > -- > Sent from my mobile device > Envoyait de mon portable > > --------------------------------------------------------------------- > To unsubscribe, e-mail: dev-unsubscr...@commons.apache.org > For additional commands, e-mail: dev-h...@commons.apache.org > >
