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From "Uwe Schindler (JIRA)" <j...@apache.org>
Subject [jira] Commented: (LUCENE-1636) TokenFilters with a null value in the constructor fail
Date Thu, 14 May 2009 11:41:45 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-1636?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12709374#action_12709374
] 

Uwe Schindler commented on LUCENE-1636:
---------------------------------------

If you do not use a delegate TokenStream, extend TokenStream instead of TokenFilter. If you
want to later set the delegate, see my comment (and patch to prevent this incorrect usage)
above.

> TokenFilters with a null value in the constructor fail
> ------------------------------------------------------
>
>                 Key: LUCENE-1636
>                 URL: https://issues.apache.org/jira/browse/LUCENE-1636
>             Project: Lucene - Java
>          Issue Type: Bug
>    Affects Versions: 2.9
>            Reporter: Wouter Heijke
>         Attachments: LUCENE-1636.patch
>
>
> While migrating from 2.4.x to 2.9-dev I found a lot of failing unittests.
> One problem is with TokenFilters that do a super(null) in the constructor.
> I fixed it by changing the constructor to super(new EmptyTokenStream())
> This will cause problems and frustration to others while migrating to 2.9.

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