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https://issues.apache.org/jira/browse/SOLR-912?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14083888#comment-14083888
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Shai Erera commented on SOLR-912:
---------------------------------

One other thing, how important is it to be able to store {{null}} names? I 
haven't dug deep through the code -- do we actually use it? This doesn't 
prevent us from using a Map internally, as we can use our own key, something 
like "$$NULL_STRING!!" (or pick some other constant) and map the null-name 
requests to this key.

> org.apache.solr.common.util.NamedList - Typesafe efficient variant - 
> ModernNamedList introduced - implementing the same API as NamedList
> ----------------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: SOLR-912
>                 URL: https://issues.apache.org/jira/browse/SOLR-912
>             Project: Solr
>          Issue Type: Improvement
>          Components: search
>         Environment: Tomcat 6, JRE 6, Solr 1.3+ nightlies 
>            Reporter: Karthik K
>            Priority: Minor
>         Attachments: NLProfile.java, SOLR-912.patch, SOLR-912.patch
>
>   Original Estimate: 72h
>  Remaining Estimate: 72h
>
> The implementation of NamedList - while being fast - is not necessarily 
> type-safe. I have implemented an additional implementation of the same - 
> ModernNamedList (a type-safe variation providing the same interface as 
> NamedList) - while preserving the semantics in terms of ordering of elements 
> and allowing null elements for key and values (keys are always Strings , 
> while values correspond to generics ). 



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