David Smiley created SOLR-17623:
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             Summary: SimpleOrderedMap should implement Map
                 Key: SOLR-17623
                 URL: https://issues.apache.org/jira/browse/SOLR-17623
             Project: Solr
          Issue Type: Improvement
            Reporter: David Smiley


SimpleOrderedMap is semantically a Map; it should implement Map.  

Why: This will help us transition away from NamedList (it's superclass) in a 
number of places, since many (most?) places that are defined to return a 
NamedList could actually be declared to be a SimpleOrderedMap and eventually 
simply Map.  

There's some risk that code somewhere gets this Map, a large one, and then 
assumes it has better than O(N) lookup, which it doesn't provide.  Perhaps a 
Javadoc warning will do.



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