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From "Grant Ingersoll (JIRA)" <>
Subject [jira] Commented: (LUCENE-1813) Add option to ReverseStringFilter to mark reversed tokens
Date Mon, 17 Aug 2009 13:47:14 GMT


Grant Ingersoll commented on LUCENE-1813:

Perhaps it is useful to define a few constants for each of these suggested characters to make
it super easy for people to use them?  Just a thought.  Otherwise, I like the idea of passing
in your own marker.

> Add option to ReverseStringFilter to mark reversed tokens
> ---------------------------------------------------------
>                 Key: LUCENE-1813
>                 URL:
>             Project: Lucene - Java
>          Issue Type: Improvement
>          Components: contrib/analyzers
>    Affects Versions: 2.9
>            Reporter: Andrzej Bialecki 
>            Assignee: Robert Muir
>             Fix For: 2.9
>         Attachments: LUCENE-1813.patch, reverseMark-2.patch, reverseMark.patch
> This patch implements additional functionality in the filter to "mark" reversed tokens
with a special marker character (Unicode 0001). This is useful when indexing both straight
and reversed tokens (e.g. to implement efficient leading wildcards search).

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