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https://issues.apache.org/jira/browse/LUCENE-5012?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Matt Weber updated LUCENE-5012:
-------------------------------
    Attachment: LUCENE-5012.patch

Patch for current master.  

{{testSynAfterDecompoundStageAnalyzer}} and {{testSynStageAnalyzer}} randomly 
fail so will need to dig into this when I find some more time.

[~mikemccand] Can you take a look and make sure I didn't miss anything from the 
original?  The attached patch wasn't up to date since you were working from a 
branch.  Here is what I ran to get the latest:

{code}
svn diff --ignore-properties --old 
https://svn.apache.org/repos/asf/lucene/dev/trunk@1597052 --new 
https://svn.apache.org/repos/asf/lucene/dev/branches/lucene5012@1694511 > 
LUCENE-5012.patch
{code}

> Make graph-based TokenFilters easier
> ------------------------------------
>
>                 Key: LUCENE-5012
>                 URL: https://issues.apache.org/jira/browse/LUCENE-5012
>             Project: Lucene - Core
>          Issue Type: Improvement
>          Components: modules/analysis
>            Reporter: Michael McCandless
>            Assignee: Michael McCandless
>         Attachments: LUCENE-5012.patch, LUCENE-5012.patch
>
>
> SynonymFilter has two limitations today:
>   * It cannot create positions, so eg dns -> domain name service
>     creates blatantly wrong highlights (SOLR-3390, LUCENE-4499 and
>     others).
>   * It cannot consume a graph, so e.g. if you try to apply synonyms
>     after Kuromoji tokenizer I'm not sure what will happen.
> I've thought about how to fix these issues but it's really quite
> difficult with the current PosInc/PosLen graph representation, so I'd
> like to explore an alternative approach.



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