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https://issues.apache.org/jira/browse/FLINK-3001?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Robert Metzger updated FLINK-3001:
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Component/s: (was: Java API)
API / Type Serialization System
> Add Support for Java 8 Optional type
> ------------------------------------
>
> Key: FLINK-3001
> URL: https://issues.apache.org/jira/browse/FLINK-3001
> Project: Flink
> Issue Type: New Feature
> Components: API / Type Serialization System
> Affects Versions: 0.10.0
> Reporter: Stephan Ewen
> Priority: Minor
>
> Using {{Optional}} is a good way to handle nullable fields.
> The missing support for null fields in tuples can be easily handled by using
> {{Optional<T>}} for nullable fields and {{T}} directly for non nullable
> fields.
> That also retains best serialization efficiency.
> Since we cannot always assume the presence of {{Optional}} (only introduced
> in Java8), the TypeExtractor needs to analyze and create that TypeInfo with
> reflection.
> Further more, we need to add the OptionalTypeInfo to the flink-java8 project
> and people need to include flink-java8 in their project if they want to use
> the Optional.
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