Maybe you should take a look at the Scorer and Similarity series classes , they will show you how the score is calculated , make some change of them, and you will get what you want.
We have the same problem and we get it done by write subclasses of DefaultSimilarity and BooleanScorer 2009/11/26 Uwe Schindler <u...@thetaphi.de>: > Read the documentation of the Document class: if you set a boost for a > document, it is used when indexing the fields and multiplied to each field. > For the document itself no boost value is stored, so you cannot get it (only > so called stored fields are retrievable). > > ----- > Uwe Schindler > H.-H.-Meier-Allee 63, D-28213 Bremen > http://www.thetaphi.de > eMail: u...@thetaphi.de > > >> -----Original Message----- >> From: Wilson Wu [mailto:songzi0...@gmail.com] >> Sent: Thursday, November 26, 2009 1:01 PM >> To: java-user@lucene.apache.org >> Subject: Is it a lucene bug? >> >> Hi, >> Recently, there is a requirement to sort the hits by both the >> scores of documents and the updateTime which is a field of document to >> mark the document's update time. We want the new document in the >> front and also want high score document in the front,in other words, >> we want to mix the score and updateTime, but not first sort by >> one,second by the other. So, I design a time based function f(t) to >> calculte each document boost to write into the index store. >> The result is that I can caculate a value for each document >> based its update time, and the value can influence the document score >> through adjusting the fieldNorm value. But when I lookup the boost >> value through the method document.getBoost() from every document in >> the index store, I found the boost value = 1.0. Which means I can set >> a document's boost value and the boost value can adjust the final >> score, but I can't read the boost value from the document I have >> searched out. >> Is it a bug in lucene? Thanks. I use lucene version 2.4.1. >> PS: Is there any other way to meet my reqirement? I think it is >> not a good idea to adjust document's final score through writing a >> document boost into the index store. Because if I want to open two >> interfaces to the Client: one is sorting documents only by score which >> is just the similarity score and has not been adjusted by boost value >> f(t), the other is sorting by final score which has been adjuested by >> boost value f(t). Thank a lot! >> >> wilson >> >> --------------------------------------------------------------------- >> To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org >> For additional commands, e-mail: java-user-h...@lucene.apache.org > > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org > For additional commands, e-mail: java-user-h...@lucene.apache.org > > -- 梦的开始挣扎于城市的边缘 心的远方执着在脚步的瞬间 我的宿命埋藏了寂寞的永远 --------------------------------------------------------------------- To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org For additional commands, e-mail: java-user-h...@lucene.apache.org
