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https://issues.apache.org/jira/browse/FLINK-3042?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15509731#comment-15509731
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ASF GitHub Bot commented on FLINK-3042:
---------------------------------------

Github user asfgit closed the pull request at:

    https://github.com/apache/flink/pull/2337


> Define a way to let types create their own TypeInformation
> ----------------------------------------------------------
>
>                 Key: FLINK-3042
>                 URL: https://issues.apache.org/jira/browse/FLINK-3042
>             Project: Flink
>          Issue Type: Improvement
>          Components: Core
>    Affects Versions: 0.10.0
>            Reporter: Stephan Ewen
>            Assignee: Timo Walther
>             Fix For: 1.0.0
>
>
> Currently, introducing new Types that should have specific TypeInformation 
> requires
>   - Either integration with the TypeExtractor
>   - Or manually constructing the TypeInformation (potentially at every place) 
> and using type hints everywhere.
> I propose to add a way to allow classes to create their own TypeInformation 
> (like a static method "createTypeInfo()").
> To support generic nested types (like Optional / Either), the type extractor 
> would provide a Map of what generic variables map to what types (deduced from 
> the input). The class can use that to create the correct nested 
> TypeInformation (possibly by calling the TypeExtractor again, passing the Map 
> of generic bindings).



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