How do I make the QueryParser in Lucene handle numeric ranges?

Question

new QueryParser(.... ).parse (somequery);

it works only for string indexed fields. Say i have a field called count where count is a integer field (

Answer 1

You need to inherit from QueryParser and override GetRangeQuery(string field, ...). If field is one of your numeric field names, return an instance of NumericRangeQuery, otherwise return base.GetRangeQuery(...).

There is an example of such an implementation in this thread: http://www.mail-archive.com/java-user@lucene.apache.org/msg29062.html