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https://issues.apache.org/jira/browse/LUCENE-1813?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12743936#action_12743936
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Robert Muir commented on LUCENE-1813:
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what if we simply make it so there is no boolean option for a marker character,
instead it is ReverseFilter() and ReverseFilter(char marker)
This way, lucene does not define the character used for this operation, and
someone can feel free to select whichever they want (such as U+0001)
When we are on java 5 and can support supp. characters properly
(reversing/wildcards,etc), then we can change this to ReverseFilter(int marker)
and someone can use anything they want, including outside of the BMP?
If this is ok, I will supply a patch.
> Add option to ReverseStringFilter to mark reversed tokens
> ---------------------------------------------------------
>
> Key: LUCENE-1813
> URL: https://issues.apache.org/jira/browse/LUCENE-1813
> Project: Lucene - Java
> Issue Type: Improvement
> Components: contrib/analyzers
> Affects Versions: 2.9
> Reporter: Andrzej Bialecki
> Assignee: Robert Muir
> Fix For: 2.9
>
> Attachments: 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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