Josh Wills created PARQUET-140:
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Summary: Allow clients to control the GenericData object that is
used to read Avro records
Key: PARQUET-140
URL: https://issues.apache.org/jira/browse/PARQUET-140
Project: Parquet
Issue Type: Improvement
Components: parquet-mr
Reporter: Josh Wills
Right now, Parquet always uses the default SpecificData instance (retrieved by
SpecificData.get()) to lookup the schemas for SpecificRecord subclasses.
Unfortunately, if the definition of the SpecificRecord subclass is not
available to the classloader used in SpecificData.get(), we will fail to find
the definition of the SpecificRecord subclass and will fall back to returning a
GenericRecord, which will cause a ClassCastException in any client code that is
expecting an instance of the SpecificRecord subclass.
We can fix this limitation by allowing the client code to specify how to
construct a custom instance of SpecificData (or any other subclass of
GenericData) for Parquet to use, including instances of SpecificData that use
alternative classloaders.
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