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https://issues.apache.org/jira/browse/LUCENE-2088?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12781122#action_12781122
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Earwin Burrfoot commented on LUCENE-2088:
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bq. && Attribute.class.isAssignableFrom(attClass)
What is this for? This line
bq. public <A extends Attribute> A addAttribute(Class<A> attClass) {
ensures the same at compile time.
> AttributeSource.addAttribute should only accept interfaces, the missing test
> leads to problems with Token.TOKEN_ATTRIBUTE_FACTORY
> ---------------------------------------------------------------------------------------------------------------------------------
>
> Key: LUCENE-2088
> URL: https://issues.apache.org/jira/browse/LUCENE-2088
> Project: Lucene - Java
> Issue Type: Bug
> Affects Versions: 2.9, 2.9.1, 3.0
> Reporter: Uwe Schindler
> Assignee: Uwe Schindler
> Priority: Blocker
> Fix For: 3.0
>
> Attachments: LUCENE-2088.patch
>
>
> This is a blocker, because you can call addAttribute(Token.class) without
> getting an error message.
> I will commit the fix and restart the vote for 3.0. This also applies to 2.9,
> but there is no Token Attribute Factory. But I will merge to 2.9, too, if a
> 2.9.2 comes.
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