Josh Wills created CRUNCH-242:
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Summary: Input/output conversion needs to be controlled by the
Source/Target interfaces
Key: CRUNCH-242
URL: https://issues.apache.org/jira/browse/CRUNCH-242
Project: Crunch
Issue Type: Bug
Reporter: Josh Wills
I was working on adding support for Parquet to Crunch, and ran into the issue
that Parquet always assumes that the value it returns is on the "value" side of
the key-value pair of an InputFormat/OutputFormat. Crunch, for semi-sensible
historical reasons, makes this position dependent on the PTypeFamily (Avro
PTypes write to the key, Writable PTypes write to the value). Since the Parquet
InputFormat/OutputFormat treat the two types the same way, we need a way for
the Source and Target implementations to override the default configuration of
the PTypes and choose the right side for the given format.
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