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https://issues.apache.org/jira/browse/LUCENE-1481?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12654434#action_12654434
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Michael McCandless commented on LUCENE-1481:
--------------------------------------------

Patch looks good; I'll commit shortly.

> Sort and SortField does not have equals() and hashCode()
> --------------------------------------------------------
>
>                 Key: LUCENE-1481
>                 URL: https://issues.apache.org/jira/browse/LUCENE-1481
>             Project: Lucene - Java
>          Issue Type: Bug
>          Components: Query/Scoring
>    Affects Versions: 2.4
>            Reporter: Uwe Schindler
>            Assignee: Michael McCandless
>             Fix For: 2.9
>
>         Attachments: LUCENE-1481.patch
>
>
> During developing for my project panFMP I had the following issue:
> I have a cache for queries (like Solr has, too)  for query results. This 
> cache also uses the Sort/SortField as key into the cache. The problem is, 
> because Sort/SortField does not implement equals() and hashCode(), you cannot 
> store them as cache keys. To workaround, currently I use Sort.toString() as 
> cache key, but this is not so nice.
> In corelation with issue LUCENE-1478, I could fix this there in one patch 
> together with the other improvements.

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