[jira] [Updated] (LUCENE-5835) Add sortMissingLast support to TermValComparator

["Adrien Grand (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/LUCENE-5835?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Adrien Grand updated LUCENE-5835:
---------------------------------

    Attachment: LUCENE-5835.patch

Here is a patch. I removed the notes about removing TermValComparator as it is the only way to sort a field that has binary doc values.

Other than that:
 - it can now sort missing values last
 - you can override the terms and docsWithField that are used for comparison
 - you can override the detection for null values. This is typically useful if there is a sentinel value that represents null.

I didn't add support for custom missing values as I'm not sure it is a common need on binary/string content but it is easy to implement on top of this comparator by overriding {{getDocsWithField}} to return a Bits.MatchAllBits set and wrap the binary dv returned by {{getBinaryDocValues}}.

> Add sortMissingLast support to TermValComparator
> ------------------------------------------------
>
>                 Key: LUCENE-5835
>                 URL: https://issues.apache.org/jira/browse/LUCENE-5835
>             Project: Lucene - Core
>          Issue Type: Improvement
>            Reporter: Adrien Grand
>            Assignee: Adrien Grand
>            Priority: Minor
>             Fix For: 5.0, 4.10
>
>         Attachments: LUCENE-5835.patch
>
>
> It would be nice to allow to configure the behavior on missing values for this comparator, similarly to what TermOrdValComparator does.



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