On Aug 27, 2008, at 7:34 PM, Shi Hui Liu wrote:
Hi,
I think I should clarify my question a little bit. I'm using
BooleanQuery to combine TermQuery(A) and TermQuery(B). But I'm not
satisfied with its scoring algorigthm. Is there other queries can
boost up the documents with 50 of A and 50 of B on top of documents
with 1000 of A and 1 of B?
Is your query A + B meant to be A OR B or A AND B? That is, are both
terms required? You notation suggests they are, but the description
suggests you are getting documents that have only A in them, which
suggests "OR".
Have you looked at the explains? What about the scoring aren't you
happy with? It's not perfect (there is no such thing) but it works
pretty well in most cases, and works great if you spend a little time
figuring out the right length normalization factors.
And I'm looking at the source code and found lots of classes are not
public and some important methods are protected. What's the reason?
Why make them public and let users to customize the Query easily?
Because there not meant to be overridden, but of course we are open to
specific suggestions on things that should be made public and often do
this when someone shows a valid reason.
Cheers,
Grant
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