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From "Grant Ingersoll (JIRA)" <>
Subject [jira] Created: (LUCENE-975) Position based TermVectorMapper
Date Wed, 08 Aug 2007 02:35:59 GMT
Position based TermVectorMapper

                 Key: LUCENE-975
             Project: Lucene - Java
          Issue Type: New Feature
          Components: Store
            Reporter: Grant Ingersoll
            Assignee: Grant Ingersoll
            Priority: Minor

As part of the new TermVectorMapper approach to TermVectors, the ensuing patch loads term
vectors and stores the term info by position.  This should let people directly index into
a term vector given a position.  Actually, it does it through Maps, b/c the array based bookkeeping
is a pain given the way positions are stored.  

The map looks like:
Map<String,   Map<Integer, TVPositionInfo>>

where the String is the field name, the integer is the position, and TVPositionInfo is a storage
mechanism for the terms and offsets that occur at a position.  It _should_ handle multiple
terms per position (which is always my downfall! )

I have not tested performance of this approach.

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