Wes McKinney created ARROW-5929:
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Summary: [Java] Define API for ExtensionVector whose data must be
serialized prior to being sent via IPC
Key: ARROW-5929
URL: https://issues.apache.org/jira/browse/ARROW-5929
Project: Apache Arrow
Issue Type: Improvement
Components: Java
Reporter: Wes McKinney
As being discussed on the mailing list, a possible use case for ExtensionVector
involves having the Arrow buffers contain pointer-type values referring to
memory outside of the Arrow memory heap. In IPC, such vectors would need to be
serialized to a wholly Arrow-resident form, such as a VarBinaryVector. We do
not have an API to allow for this, so this JIRA proposes to add new functions
that can indicate to the IPC layer that an ExtensionVector requires additional
serialization to a native Arrow type (in such case, the extension type metadata
would be discarded)
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