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https://issues.apache.org/jira/browse/LUCENE-1306?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12605120#action_12605120
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Otis Gospodnetic commented on LUCENE-1306:
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Should there be a way for the client of this class to specify the prefix and
suffix char?
Is having, for example, "^h" as the first bi-gram token really the right thing
to do? Would "^he" make more sense? I know that makes it 3 characters long,
but it's 2 chars from the input string. Not sure, so I'm asking.
Is this primarily to distinguish between the edge and inner n-grams? If so,
would it make more sense to just make use of Token type variable instead?
> CombinedNGramTokenFilter
> ------------------------
>
> Key: LUCENE-1306
> URL: https://issues.apache.org/jira/browse/LUCENE-1306
> Project: Lucene - Java
> Issue Type: New Feature
> Components: contrib/analyzers
> Reporter: Karl Wettin
> Assignee: Karl Wettin
> Priority: Trivial
> Attachments: LUCENE-1306.txt
>
>
> Alternative NGram filter that produce tokens with composite prefix and suffix
> markers.
> {code:java}
> ts = new WhitespaceTokenizer(new StringReader("hello"));
> ts = new CombinedNGramTokenFilter(ts, 2, 2);
> assertNext(ts, "^h");
> assertNext(ts, "he");
> assertNext(ts, "el");
> assertNext(ts, "ll");
> assertNext(ts, "lo");
> assertNext(ts, "o$");
> assertNull(ts.next());
> {code}
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