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Posted to dev@lucene.apache.org by "Ryan McKinley (JIRA)" <ji...@apache.org> on 2010/10/14 02:29:32 UTC
[jira] Updated: (LUCENE-2671) Add sort missing first/last ability
to SortField and ValueComparator
[ https://issues.apache.org/jira/browse/LUCENE-2671?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Ryan McKinley updated LUCENE-2671:
----------------------------------
Attachment: LUCENE-2671-suppress-unchecked.patch
here is a patch that ignores all the unchecked casts
{code:java}
@SuppressWarnings("unchecked")
{code}
I don't think there is any way around this for the current design -- in LUCENE-2665, the cache would directly use the generic map, but for the baby step it needs a cast.
The issues is that we have:
{code:java}
private Map<Class<?>,Cache> caches;
{code}
and really need to be able to define something like:
{code:java}
private Map<Class<X>,Cache<? extends X>> caches;
{code}
where X depends on what you put into the map... but that is not possible as far as I know.
- - -
I would commit this, but the build is failing for other reasons....
> Add sort missing first/last ability to SortField and ValueComparator
> --------------------------------------------------------------------
>
> Key: LUCENE-2671
> URL: https://issues.apache.org/jira/browse/LUCENE-2671
> Project: Lucene - Java
> Issue Type: New Feature
> Components: Search
> Reporter: Ryan McKinley
> Assignee: Ryan McKinley
> Fix For: 4.0
>
> Attachments: LUCENE-2671-SortMissingLast.patch, LUCENE-2671-suppress-unchecked.patch
>
>
> When SortField and ValueComparator use EntryCreators (from LUCENE-2649) they use a special sort value when the field is missing.
> This enables lucene to implement 'sort missing last' or 'sort missing first' for numeric values from the FieldCache.
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