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http://nagoya.apache.org/bugzilla/show_bug.cgi?id=26702 [PATCH] arbitrary sorting ------- Additional Comments From [EMAIL PROTECTED] 2004-02-09 20:09 ------- So I'm thinking something like this: in Searchable: TopFieldDocs search (Query q, Filter f, int n, String[] sort_fields) where: TopFieldDocs is like TopDocs class FieldDoc { int doc; float score; String[] field_values; // correlates to sort_fields[] } although there's some issues to think about: Since field_values[] could be either integer, float or string we could make it an Object[] array. But this might not be as efficient as just using the string term values we have already. On the other hand, the data transport layer isn't so efficient because it is converting to and from string values. So I'm not really sure - any opinions? Secondly, since we have the document number and relevancy in the structure, in the cases where sort is done by a mixture of field(s) and either relevancy or document number, the field_values[] array doesn't exactly match the original sort_fields[] array. Or, we could go ahead and put those values in the array as strings (or Object). Thirdly, it means we rely upon pattern matching to detect whether the field terms are integers, floats or strings. This works well enough unless there are terms that look like integers or floats but really are strings (assuming we look for integers first, then floats, then assume strings). For this last problem what I'm wondering is if we might want to extend the Field class to have IntegerField and FloatField. This provides error checking on the data on the way into the index, so when we get it back out we can be reasonably sure we have clean data (i.e. we don't try to interpret the contents of a field as int when really it's not). Kind of like DateField. Following on to this - is there any place to store and then retrieve what data type a field was given? Is there someplace in the index to say a field is only integers or only floats? Then we wouldn't have to rely upon pattern matching. --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
