Li Jin created ARROW-1497:
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Summary: [Java] JsonFileReader doesn't set value count for some
vectors
Key: ARROW-1497
URL: https://issues.apache.org/jira/browse/ARROW-1497
Project: Apache Arrow
Issue Type: Bug
Reporter: Li Jin
Currently, in complex types, JsonFileReader only sets value count for
NullableMapType by an instance check, this is error prone and cause issues with
reading other complex types:
https://github.com/apache/arrow/blob/master/java/vector/src/main/java/org/apache/arrow/vector/file/json/JsonFileReader.java#L269
We should have a better way to do this.
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