You could create a new Similarity class plugin that take in account every parameters you need. :
http://wiki.apache.org/solr/SolrPlugins?highlight=%28similarity%29#Similarity but, as Jan said, be carefull with the cost of the the similarity function. Ludovic. 2011/4/19 Jan Høydahl / Cominvent [via Lucene] < ml-node+2839526-2100261518-383...@n3.nabble.com> > Hi, > > Not possible :) > Lucene compares each matching document against the query and produces a > score for each. > Documents are not compared to eachother like normal sort, that would be way > too costly. > > But if you explain your use case, I'm sure we can find ways to express your > needs in other ways > > Perhaps it is possible for you to use Sort by Function? > http://wiki.apache.org/solr/FunctionQuery#Sort_By_Function > Then you can decide exactly what goes into your sort score. > If you want to do conditional stuff, you may need to pre-process your > documents a bit and create new fields which can be used in a FunctionQuery. > > -- > Jan Høydahl, search solution architect > Cominvent AS - www.cominvent.com > > On 19. apr. 2011, at 19.02, Michael Owen wrote: > > > > > Hi, > > I want to able to have a custom sorting algorithm such that for each > comparison of document results (A v B) I can rank them. i.e. writing a > comparator like I would normally do in Java (Compares its two arguments for > order. Returns a negative integer, zero, or a positive integer as the first > argument is less than, equal to, or greater than the second). > > In the comparator I want to be able to take into account the score of the > results, as well as other fields in the documents. > > I've looked at using things such as the score/boost/bf parameters etc, > however, want the flexibility of being able to code the comparator, so I can > do if conditions and such. > > Is this possible? And if so what's the best way of doing this? I've > upgraded to use the latest version of Solr 3.1, and of course for this use > case would expect to have to build from source, in order to add custom > source. > > Or/and, when using the score/boost/bf parameters etc - is it possible to > use the score parameter in functions, to say scale it between 0 and 1? > > Thanks > > Mike > > > > > > > > > > > > ------------------------------ > If you reply to this email, your message will be added to the discussion > below: > http://lucene.472066.n3.nabble.com/Custom-Sorting-tp2839375p2839526.html > To start a new topic under Solr - User, email > ml-node+472068-1765922688-383...@n3.nabble.com > To unsubscribe from Solr - User, click > here<http://lucene.472066.n3.nabble.com/template/NamlServlet.jtp?macro=unsubscribe_by_code&node=472068&code=Ym91dHJvc2xAZ21haWwuY29tfDQ3MjA2OHw0Mzk2MDUxNjE=>. > > ----- Jouve France. -- View this message in context: http://lucene.472066.n3.nabble.com/Custom-Sorting-tp2839375p2839593.html Sent from the Solr - User mailing list archive at Nabble.com.
