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From "Robert Muir (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SOLR-5084) new field type - EnumField
Date Thu, 08 Aug 2013 23:33:47 GMT

    [ https://issues.apache.org/jira/browse/SOLR-5084?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13734178#comment-13734178
] 

Robert Muir commented on SOLR-5084:
-----------------------------------

I agree with Hossman.. stick with it though, I really like the idea of an efficient enumerated
type.

A few other ideas/questions (just from a glance, i could be wrong):
* should we enforce from the enum config that the integer values are 0-N or something simple?
This way, things like valuesources dont have to do hashing but simple array lookups.
* it isnt clear to me what happens if you send a bogus value. I think an enumerated type would
be best if its "strongly-typed" and just throws exception if the value is bogus.
* should the config, instead of being a separate config file, just be a nested element underneath
the field type? I dont know if this is even possible or a good idea, but its an that would
remove some xml files.

                
> new field type - EnumField
> --------------------------
>
>                 Key: SOLR-5084
>                 URL: https://issues.apache.org/jira/browse/SOLR-5084
>             Project: Solr
>          Issue Type: New Feature
>            Reporter: Elran Dvir
>         Attachments: enumsConfig.xml, schema_example.xml, Solr-5084.patch, Solr-5084.patch
>
>
> We have encountered a use case in our system where we have a few fields (Severity. Risk
etc) with a closed set of values, where the sort order for these values is pre-determined
but not lexicographic (Critical is higher than High). Generically this is very close to how
enums work.
> To implement, I have prototyped a new type of field: EnumField where the inputs are a
closed predefined  set of strings in a special configuration file (similar to currency.xml).
> The code is based on 4.2.1.

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