[jira] Updated: (SOLR-1571) unicode collation support

["Robert Muir (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SOLR-1571?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Robert Muir updated SOLR-1571:
------------------------------

    Attachment: SOLR-1571.patch

initial patch.

> unicode collation support
> -------------------------
>
>                 Key: SOLR-1571
>                 URL: https://issues.apache.org/jira/browse/SOLR-1571
>             Project: Solr
>          Issue Type: New Feature
>          Components: Analysis
>            Reporter: Robert Muir
>            Priority: Minor
>         Attachments: SOLR-1571.patch
>
>
> This patch adds support for unicode collation (searching and sorting).
> Unicode collation is helpful in a search engine, for many languages you want things to match or sort differently.
> You might even want to use copyfield and support different sort orders/matching schemes if you need to support multiple languages.
> This is simply a factory for lucene's CollationKeyFilter, which indexes binary collation keys in a special format that preserves binary sort order.
> I've added support for creating a Collator in two ways:
> * system collator from a Locale spec (language + country + variant)
> * tailored collator from custom rules in a text file
> in no way is there an option to use the "default" locale of the jvm, (I consider this a bit dangerous)
> in this patch, it is mandatory to define the locale explicitly for a system collator.
> The required lucene-collation-2.9.1.jar is only 12KB.

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