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https://issues.apache.org/jira/browse/LUCENE-3830?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Michael McCandless updated LUCENE-3830:
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Attachment: LUCENE-3830.patch
Patch; I think it's basically working.
I disallow empty string match to be added (this was accepted, but I think
ignored, before), so I had to fix a couple places that were doing that.
I also added another random test that separately (slowly) computes the output &
corrected offsets and then compares ... it's passing.
I still need to do a perf test.. does anyone have a "typical" set of mappings +
content I could use? Else I'll try to come up with something...
> MappingCharFilter could be improved by switching to an FST.
> -----------------------------------------------------------
>
> Key: LUCENE-3830
> URL: https://issues.apache.org/jira/browse/LUCENE-3830
> Project: Lucene - Java
> Issue Type: Improvement
> Reporter: Dawid Weiss
> Assignee: Michael McCandless
> Priority: Minor
> Labels: gsoc2012, lucene-gsoc-12
> Fix For: 4.0
>
> Attachments: LUCENE-3830.patch
>
>
> MappingCharFilter stores an overly complex tree-like structure for matching
> input patterns. The input is a union of fixed strings mapped to a set of
> fixed strings; an fst matcher would be ideal here and provide both memory and
> speed improvement I bet.
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