You can utilize the CustomScoreQuery introduced in Lucene 2.2 to provide
this type of functionality. This is quite straight forward to do and works
really well. Since "recentness" is a function of the time the search was
made, we store the appropriate date in an index field and use a
CustomScoreQuery to effect changes to the score based on the current date.
Works like a champ.
-tree
On Jan 3, 2008 2:33 PM, <[EMAIL PROTECTED]> wrote:
> IMHO it would be nice if Lucene's Similarity formula took the
> indexed-date of the document into account. Ideally as an optional
> setting, where the user can provide a date field as well.
>
> Some of the other search engines do - for example Fast's Instream. It
> makes sense that as documents age over time, they are less important
> than the new ones.
>
> Is JIRA the mechanism where you can add "feature requests" for Lucene?
>
>
> -----Original Message-----
> From: Dominik Bruhn [mailto:[EMAIL PROTECTED]
> Sent: Sunday, December 30, 2007 4:38 AM
> To: java-user@lucene.apache.org
> Subject: Re: Prioiritze new documents
>
> Hy,
> a solution came into my mind:
> Every document gets boosted by a integer which I increment each time I
> add a new document to the index. So the newer documents should get a
> bigger boost than the older ones.
>
> I tried it out and ran into a problem:
> Although I set the Boost via doc.setBoost(value) for each document
> before writing it to the index it doesnt change anything. Even worse if
> I look at the index using Luke (Version 0.7.1) each document got a boost
> of 1 not of the value supplied.
>
> Who can help me?
>
> Thanks
> --
> Dominik Bruhn
> mailto: [EMAIL PROTECTED]
>
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--
Tom Emerson
[EMAIL PROTECTED]
http://www.dreamersrealm.net/~tree
