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https://issues.apache.org/jira/browse/LUCENE-1481?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12654100#action_12654100
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Uwe Schindler commented on LUCENE-1481:
---------------------------------------

No problem, I check out a new svn trunk copy and do the changes here. They do 
not affect my other changes. This is rather simple (only again, that 
Arrays.hashCode() appears only first in Java 1.5 :-(, see LUCENE-1415).

And juhee, this is now my fifth or sixth patch for a Lucene project (TIKA and 
LUCENE together), I think I am ready to apply for Apache Contributor status 
:-), currently I am only contributor and maintainer of a module in PHP core 
(which is a Apache related project, but a little bit special).

As a side-note to the discussion about the serialization issues and the 
contributer status discussion on java-dev...

> 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
>
> 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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