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Posted to dev@flink.apache.org by "YangFei (JIRA)" <ji...@apache.org> on 2019/05/06 11:00:00 UTC

[jira] [Created] (FLINK-12412) Allow ListTypeInfo used for java.util.List and MapTypeInfo used for java.util.Map

YangFei created FLINK-12412:
-------------------------------

             Summary: Allow ListTypeInfo used for java.util.List and MapTypeInfo used for java.util.Map
                 Key: FLINK-12412
                 URL: https://issues.apache.org/jira/browse/FLINK-12412
             Project: Flink
          Issue Type: New Feature
          Components: API / Type Serialization System
    Affects Versions: 1.9.0
            Reporter: YangFei
            Assignee: YangFei
             Fix For: 1.9.0


public static class UserBehavior {
 public long userId; 
 public long itemId; 
 public int categoryId;
public long timestamp; 
 public List<String> comments;
}

public static void main(String[] args) throws Exception {
 PojoTypeInfo<UserBehavior> pojoType = (PojoTypeInfo<UserBehavior>) TypeExtractor.createTypeInfo(UserBehavior.class);
 });
}

 

The filed `comments` in `UserBehavior` will be extracted by TypeExtractor to `GenericType` .

I think it can be extracted to ListTypeInfo .

This would be a big improvement as in many cases classes including List or Map



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