Uwe Schindler commented on LUCENE-7630:

Hi, could you create a Pull Request and add the link here?

About your branch: I would not use cloneAttributes() because thats slow for 
this simple case. cloneAttributes() only helps if you want to modify the 
attributes in the AttributeSource that was created, but is not useful for 
simple save/restore use cases.

For your case, you should simple use captureState(), save the state object and 
then call restorestate() instead of clearAttributes(). After restoring you can 
adapt term text and positions/offsets. In addition when you clone or capture 
state, the call to clearAttributes() is useless and also slows down. When 
restoring states, everything is restored, so the additional clearing before is 
not needed.

> EdgeNGramTokenFilter drops payloads
> -----------------------------------
>                 Key: LUCENE-7630
>                 URL: https://issues.apache.org/jira/browse/LUCENE-7630
>             Project: Lucene - Core
>          Issue Type: Bug
>          Components: modules/analysis
>    Affects Versions: master (7.0)
>            Reporter: Nathan Gass
>            Priority: Minor
>   Original Estimate: 48h
>  Remaining Estimate: 48h
> Using an EdgeNGramTokenFilter after a DelimitedPayloadTokenFilter discards 
> the payloads, where as most other filters copy the payload to the new tokens.
> I added a test for this issue and a possible fix at 
> https://github.com/xabbu42/lucene-solr/tree/edgepayloads
> Greetings
> Nathan Gass

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