Thanks Toke and Kirill -- I guess that's the way to go (at least until v4.0).
Best regards
gregor
On 4/13/11 3:42 PM, Toke Eskildsen wrote:
On Tue, 2011-04-12 at 11:41 +0200, Gregor Heinrich wrote:
Hi -- has there been any effort to create a numerical representation of Lucene
indices. That is, to use the Lucene Directory backend as a large term-document
matrix at index level. As this would require bijective mapping between terms
(per-field, as customary in Lucene) and a numerical index (integer, monotonous
from 0 to numTerms()-1), I guess this requires some some special modifications
to the Lucene core.
Maybe you're thinking about something like TermsEnum?
https://hudson.apache.org/hudson/job/Lucene-trunk/javadoc/all/org/apache/lucene/index/TermsEnum.html
It provides ordinal-access to terms, represented with longs. In order to
make the access at index-level rather than segment-level you will have
to perform a merge of the ordinals from the different segments.
Unfortunately it is optional whether the codec supports ordinal-based
terms access and the default codec does not, so you will have to
explicitly select a codec when you build your index.
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