Can't answer the second question, but the answer to the first is "no". Not only are Lucene IDs internally generated, but they change when you delete/optimize.
Would caching filters help? Especially if you pre-computed them at, say, warm up? What problem are you trying to solve anyway? A statement of the problem might get you better answers..... Best Erick On 10/11/07, sandeep chawla <[EMAIL PROTECTED]> wrote: > > Hi All, > > I have two questions here > > 1- Lucene generates id for every document it indexes and it does in > order..0,1,2,3.....n .Can i make lucene use my id ( my id for a document > ..say randomly generated unique id for a document) as lucene id. > > The reason i am asking this question because lucene filter uses lucene id > ( > to create BitSet ) and i dont wanna keep multiple ids . > > 2- Is there any way to change lucene's scoring formula without changing > the > lucene core. > I know, there is one way of doing this is to extend the similarity and > thats > really simple but it can help only in formulae which has tf and idf in > multiplication. > > for example a formula like tf(power n) * idf ( power m) can be easily > implemented using similarity > > but what about the formula tf(power n) + idf(power m ) > > is there a simple way to implement the above without changing lucene core > ( > i know one way to do is too change the TermScorer and hardcore the + sign > but that's too naive :) > > Thanks a lot ... > Sandeep > > -- > SANDEEP CHAWLA > House No- 23 > 10th main > BTM 1st Stage > Bangalore Mobile: 91-9986150603 >
