Stephan Ewen created FLINK-3042:
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Summary: 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
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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