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https://issues.apache.org/jira/browse/LUCENE-5180?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Michael McCandless updated LUCENE-5180:
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Attachment: LUCENE-5180.patch
Patch; it turned out to be easier than I expected: I just tapped into the
existing logic that ShingleFilter has for handling holes between tokens.
> ShingleFilter should make shingles from trailing holes
> ------------------------------------------------------
>
> Key: LUCENE-5180
> URL: https://issues.apache.org/jira/browse/LUCENE-5180
> Project: Lucene - Core
> Issue Type: Improvement
> Components: modules/analysis
> Reporter: Michael McCandless
> Assignee: Michael McCandless
> Fix For: 5.0, 4.6
>
> Attachments: LUCENE-5180.patch
>
>
> When ShingleFilter hits a hole, it uses _ as the token, e.g. bigrams for "the
> dog barked", if you have a StopFilter removing the, would be: "_ dog", "dog
> barked".
> But if the input ends with a stopword, e.g. "wizard of", ShingleFilter fails
> to produce "wizard _" due to LUCENE-3849 ... once we fix that I think we
> should fix ShingleFilter to make shingles for trailing holes too ...
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