Teddy Choi created ARROW-2538:
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Summary: [Java] Introduce FieldWriter.writeNull method
Key: ARROW-2538
URL: https://issues.apache.org/jira/browse/ARROW-2538
Project: Apache Arrow
Issue Type: Improvement
Components: Java - Vectors
Reporter: Teddy Choi
Assignee: Teddy Choi
When a data set has null values in complex data type, it's hard to call proper
writeNull method. Because writeNull is declared in AbstractFieldWriter, which
is package local, not public. Moreover, UnionListWriter has no implementation
of writeNull method, so it falls into AbstractFieldWriter.writeNull, which
throws an IllegalArgumentException by default. So FieldWriter.writeNull is
required to write null values inside of complex data types.
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