ParquetWriter.Builder (and subclasses) instances are hard to reuse

Hi,

The builders to create ParquetWriter and AvroParquetWriter are very useful, but unfortunately their instance are very hard to reuse when you want to build multiple instance of ParquetWriter for different files but similar settings.

This is a shame because that's one of the concern solved by the builder pattern: from one builder you can build multiple things with similar parameters.

It would be useful if either:
- it was possible to create a builder from a pre-existing builder (except for the file name)
- it was possible to change the file name specified in the builder (and not have it definable only via constructor of the builder).

This would allow people to pass a set of options in the form of a builder to an object responsible of generically instantiating a PaquetWriter for multiple files for example.

 

**Reporter**: [Victor](https://issues.apache.org/jira/secure/ViewProfile.jspa?name=victor.noel)

_{**Note**: *This issue was originally created as [PARQUET-1562](https://issues.apache.org/jira/browse/PARQUET-1562). Please see the [migration documentation](https://issues.apache.org/jira/browse/PARQUET-2502) for further details.*}

Start by locating ParquetWriter.Builder and the AvroParquetWriter builder subclasses. Compare the two requested reuse approaches and their builder state; done means one builder can create multiple writers for different files while preserving shared settings, with coverage for the supported builder types.

Scritto dal modello di indicizzazione a partire dal testo della issue.