I'd suggest starting with a couple of places:
http://lucene.apache.org/java/2_3_2/fileformats.html
and
http://lucene.apache.org/java/2_3_2/scoring.html
and then do as Yonik said and step through the internals, starting
with a simple TermQuery which leads to the TermScorer.
-Grant
On Jul 2, 2008, at 10:04 PM, blazingwolf7 wrote:
Hmmm, I don't think I get it. How is it tracked during index time? I
index my
file earlier. Later I will open the index and perform a search.
Shouldn't
the frequency of each term in each document found be calculated at
during
the searching process?
Yonik Seeley wrote:
The frequency is tracked at index time. It's simply a read at query
time. See TermDocs.
If you really want to understand more about the code internals of
Lucene, I'd suggest stepping through more example queries with a
debugger.
-Yonik
On Wed, Jul 2, 2008 at 8:49 PM, blazingwolf7 <[EMAIL PROTECTED]>
wrote:
Thanks, I am clear now on that. But do anyone know where is the
frequency
of
the term for each document calculated? I mean which class it may
be in
and
which method?
Thanks
Uwe Schindler wrote:
A VInt is the way, how integers are stored in the index file in a
compressed
and variable length manner.
Read here: http://lucene.apache.org/java/2_3_2/
fileformats.html#VInt
-----
Uwe Schindler
H.-H.-Meier-Allee 63, D-28213 Bremen
http://www.thetaphi.de
eMail: [EMAIL PROTECTED]
-----Original Message-----
From: blazingwolf7 [mailto:[EMAIL PROTECTED]
Sent: Wednesday, July 02, 2008 11:47 AM
To: java-dev@lucene.apache.org
Subject: readVInt, what is it for?
Hi,
I am fairly new to Lucene and is now currently going through its
source
code. I am currently trying to determine how Lucene calculate the
frequency
of a term in each document located.
I encounter a method named readVInt() in IndexInput class. It
seems
everytime it called this method it will be able to generate the
document
number and the frequency of the term in each document.
I am wondering how it work and fail to find and information on
it on
the
Internet. Could anyone explain it to me? Thanks
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Grant Ingersoll
http://www.lucidimagination.com
Lucene Helpful Hints:
http://wiki.apache.org/lucene-java/BasicsOfPerformance
http://wiki.apache.org/lucene-java/LuceneFAQ
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