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From "Grant Ingersoll (JIRA)" <>
Subject [jira] Updated: (LUCENE-975) Position based TermVectorMapper
Date Wed, 08 Aug 2007 02:37:59 GMT


Grant Ingersoll updated LUCENE-975:

    Attachment: LUCENE-975.patch

First attempt at a position based TermVectorMapper.  I believe it is ready to go, but will
let it sit for a few days.

> Position based TermVectorMapper
> -------------------------------
>                 Key: LUCENE-975
>                 URL:
>             Project: Lucene - Java
>          Issue Type: New Feature
>          Components: Store
>            Reporter: Grant Ingersoll
>            Assignee: Grant Ingersoll
>            Priority: Minor
>         Attachments: LUCENE-975.patch
> 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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