Introduce an interface for controlling the encoding per column
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描述
There are use-cases in which it is advantageous to have control over the type of encoding used for a given column. To achieve this, the ParquetProperties class must be refactored to facilitate its subclassing. The constructors of ParquetWriter and (probably) InternalParquetRecordWriter have to be modified as well. All the internal parquet classes have to refrain from directly instantiating ParquetProperties and should accept the instance from outside.
Currently me and my team are using a good amount of reflection and unenforceable assumptions in order to gain control of this behavior. I'd like to implement the interface change. Are you interested in this feature?
**Reporter**: [Boris Peltekov](https://issues.apache.org/jira/secure/ViewProfile.jspa?name=peltekster) / @peltekster
**Note**: *This issue was originally created as [PARQUET-226](https://issues.apache.org/jira/browse/PARQUET-226). Please see the [migration documentation](https://issues.apache.org/jira/browse/PARQUET-2502) for further details.*
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调研方向
首先阅读 ParquetProperties 以及 ParquetWriter 和 InternalParquetRecordWriter 的构造函数。跟踪会实例化 ParquetProperties 的内部 Parquet 类,然后定义控制每列编码所需的接口和依赖流;当调用方无需 reflection 或直接实例化内部组件即可提供编码行为时,即表示完成。
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