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https://issues.apache.org/jira/browse/LUCENE-2855?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12979253#action_12979253
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Uwe Schindler commented on LUCENE-2855:
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+1 to commit.
In general, one should never use interfaces as keys in maps (as long as they
don't declare the equals and hashcode methods inside the interface).
> Contrib queryparser should not use CharSequence as Map key
> ----------------------------------------------------------
>
> Key: LUCENE-2855
> URL: https://issues.apache.org/jira/browse/LUCENE-2855
> Project: Lucene - Java
> Issue Type: Bug
> Components: contrib/*
> Affects Versions: 3.0.3
> Reporter: Adriano Crestani
> Assignee: Adriano Crestani
> Fix For: 3.0.4
>
> Attachments: lucene_2855_adriano_crestani_2011_01_08.patch
>
>
> Today, contrib query parser uses Map<CharSequence,...> in many different
> places, which may lead to problems, since CharSequence interface does not
> enforce the implementation of hashcode and equals methods. Today, it's
> causing a problem with QueryTreeBuilder.setBuilder(CharSequence,QueryBuilder)
> method, that does not works as expected.
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