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https://issues.apache.org/jira/browse/LUCENE-1058?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12546022
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Grant Ingersoll commented on LUCENE-1058:
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Any objection to me committing the CachedAnalyzer and CachedTokenizer pieces of
this patch, as I don't think they are effected by the other parts of this and
they solve the pre-analysis portion of this discussion. In the meantime, I
will think some more about the generic field case, as I do think it is useful.
I am also trying out some basic benchmarking on this.
{quote}
Things like entity extraction are normally not done by lucene analyzers AFAIK
{quote}
Consider yourself in the "know" now, as I have done this on a few occasions,
but, yes, I do agree a one to many approach is probably better if it can be
done in a generic way.
> New Analyzer for buffering tokens
> ---------------------------------
>
> Key: LUCENE-1058
> URL: https://issues.apache.org/jira/browse/LUCENE-1058
> Project: Lucene - Java
> Issue Type: Improvement
> Components: Analysis
> Reporter: Grant Ingersoll
> Assignee: Grant Ingersoll
> Priority: Minor
> Fix For: 2.3
>
> Attachments: LUCENE-1058.patch, LUCENE-1058.patch, LUCENE-1058.patch,
> LUCENE-1058.patch, LUCENE-1058.patch
>
>
> In some cases, it would be handy to have Analyzer/Tokenizer/TokenFilters that
> could siphon off certain tokens and store them in a buffer to be used later
> in the processing pipeline.
> For example, if you want to have two fields, one lowercased and one not, but
> all the other analysis is the same, then you could save off the tokens to be
> output for a different field.
> Patch to follow, but I am still not sure about a couple of things, mostly how
> it plays with the new reuse API.
> See
> http://www.gossamer-threads.com/lists/lucene/java-dev/54397?search_string=BufferingAnalyzer;#54397
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