Li Jin created ARROW-485:
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Summary: [Java] Users are required to initialize
VariableLengthVectors.offsetVector before calling
VariableLengthVectors.mutator.getSafe
Key: ARROW-485
URL: https://issues.apache.org/jira/browse/ARROW-485
Project: Apache Arrow
Issue Type: Improvement
Reporter: Li Jin
https://github.com/apache/arrow/blob/master/java/vector/src/main/codegen/templates/VariableLengthVectors.java#L492
Here VariableLengthVectors.getMutator().setSafe() calls:
{code}
offsetVector.getAccessor().get(index)
{code}
however, index 0 of offsetVector (which is always 0) is not initialized by
VariableLengthVectors.
As a result, user of the VariableLengthVectors needs to manually initialize
the class by calling:
{code}
VariableLengthVectors.getOffsetVector().getMutator().setSafe(0, 0)
{code}
I wonder if this is necessary or should VariableLengthVectors initialize this
for the user
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