[jira] Updated: (SOLR-1979) Create LanguageIdentifierUpdateProcessor

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[jira] Updated: (SOLR-1979) Create LanguageIdentifierUpdateProcessor

Sebastian Nagel (Jira)

     [ https://issues.apache.org/jira/browse/SOLR-1979?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Grant Ingersoll updated SOLR-1979:
----------------------------------

    Attachment: SOLR-1979.patch

Here's a patch that passes the tests.  Note, I modified the Solr base test case to have some new methods to properly call update handlers and then validate the results.

> Create LanguageIdentifierUpdateProcessor
> ----------------------------------------
>
>                 Key: SOLR-1979
>                 URL: https://issues.apache.org/jira/browse/SOLR-1979
>             Project: Solr
>          Issue Type: New Feature
>          Components: update
>            Reporter: Jan H√łydahl
>            Assignee: Grant Ingersoll
>            Priority: Minor
>         Attachments: SOLR-1979.patch, SOLR-1979.patch, SOLR-1979.patch
>
>
> We need the ability to detect language of some random text in order to act upon it, such as indexing the content into language aware fields. Another usecase is to be able to filter/facet on language on random unstructured content.
> To do this, we wrap the Tika LanguageIdentifier in an UpdateProcessor. The processor is configurable like this:
> {code:xml}
>   <processor class="org.apache.solr.update.processor.LanguageIdentifierUpdateProcessorFactory">
>     <str name="inputFields">name,subject</str>
>     <str name="outputField">language_s</str>
>     <str name="idField">id</str>
>     <str name="fallback">en</str>
>   </processor>
> {code}
> It will then read the text from inputFields name and subject, perform language identification and output the ISO code for the detected language in the outputField. If no language was detected, fallback language is used.

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