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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-7452) Add helper methods for all built-in Flink types to Types
Date Tue, 29 Aug 2017 13:19:00 GMT

    [ https://issues.apache.org/jira/browse/FLINK-7452?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16145264#comment-16145264
] 

ASF GitHub Bot commented on FLINK-7452:
---------------------------------------

Github user twalthr commented on the issue:

    https://github.com/apache/flink/pull/4612
  
    @fhueske Feel free to review.


> Add helper methods for all built-in Flink types to Types
> --------------------------------------------------------
>
>                 Key: FLINK-7452
>                 URL: https://issues.apache.org/jira/browse/FLINK-7452
>             Project: Flink
>          Issue Type: Improvement
>          Components: Type Serialization System
>            Reporter: Timo Walther
>            Assignee: Timo Walther
>
> Sometimes it is very difficult to provide `TypeInformation` manually, in case some extraction
fails or is not available. {{TypeHint}}s should be the preferred way but this methods can
ensure correct types.
> I propose to add all built-in Flink types to the {{Types}}. Such as:
> {code}
> Types.POJO(MyPojo.class)
> Types.POJO(Map<String, TypeInformation>)
> Types.GENERIC(Object.class)
> Types.TUPLE(TypeInformation, ...)
> Types.MAP(TypeInformation, TypeInformation)
> {code}
> The methods should validate that the returned type is exactly the requested type. And
especially in case of POJO should help creating  {{PojoTypeInfo}}.
> Once this is in place, we can deprecate the {{TypeInfoParser}}.



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