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Posted to java-user@lucene.apache.org by Karthik N S <ka...@controlnet.co.in> on 2005/01/03 04:44:37 UTC
RE: New Highlighter features + api
Hi
Mark,
Apologies..........
Can u Please tell the form where to find the
JavaDoc API for the Highlighter package u have created.
Thx in Advance
[ WISH U AND THE FORM 'A HAPPY NEW YEAR']
KARTHIK
-----Original Message-----
From: markharw00d [mailto:markharw00d@yahoo.co.uk]
Sent: Monday, January 03, 2005 4:14 AM
To: Lucene Users List
Subject: New Highlighter features
The Highlighter package in CVS has been updated with the following new
features:
* GradientFormatter is a new formatter that can be used to change the
colour intensity of matching terms, based on their score. I have found
this to be a useful way of visualizing the basis of query matches,
especially when the query was derived automatically eg in a
"MoreLikeThis" style of query.
* The QueryScorer class has a new constructor that takes an IndexReader
which is used to provide term scores based on scarcity (idf score).
Using this with the new GradientFormatter ensures the most important
terms are highlighted most strongly.
* New class "TokenSources" offers methods to produce a TokenStream from
indexes using the new TermVector features (saving the cost of
reanalyzing to produce TokenStreams for the highlighter).
TokenStreams. Formatters and Scorers are all pluggable elements of the
main Highlighter class so these are just new extensions around the
existing core functionality. See the Javadocs for further details on how
to use these components..
Cheers
Mark
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