[Java] Implement converter between Arrow record batches and Avro records

[asfimport]

It would be useful for applications which need convert Avro data to Arrow data.

This is an adapter which convert data with existing API (like JDBC adapter) rather than a native reader (like orc).

We implement this function through Avro java project, receiving param like Decoder/Schema/DatumReader of Avro and return VectorSchemaRoot. For each data type we have a consumer class as below to get Avro data and write it into vector to avoid boxing/unboxing (e.g. GenericRecord#get returns Object)

public class AvroIntConsumer implements Consumer {
private final IntWriter writer;

public AvroIntConsumer(IntVector vector)

{ this.writer = new IntWriterImpl(vector); }

@Override
public void consume(Decoder decoder) throws IOException

{ writer.writeInt(decoder.readInt()); writer.setPosition(writer.getPosition() + 1); }

We intended to support primitive and complex types (null value represented via unions type with null type), size limit and field selection could be optional for users. 

Reporter: Ji Liu / @tianchen92

Subtasks:

• [X] [Java] Create Avro adapter module and add dependencies
• [X] [Java] Initial implement to convert Avro record with primitive types
• [X] [Java] Avro adapter implement simple Record type
• [X] [Java] Avro adapter support convert nullable value
• [X] [Java] Avro adapter implement unions type
• [X] [Java] Avro adapter avoid potential resource leak.
• [X] [Java] Add API to avro adapter to limit number of rows returned at a time.
• [X] [Java] Avro adapter implement Array/Map/Fixed type
• [X] [Java] Avro adapter implement Enum type and nested Record type
• [X] [Java] Add benchmark and large fake data UT for avro adapter
• [X] [Java] Add support for skipping decoding of columns/field in Avro converter
• [ ] [Java] Experiment with performance difference of avoiding the use of Avro Decoder
• [X] [Java] Support logical type encodings from Avro
• [ ] [Java] Avro - Experiment with "compiled" consumer delegates for performance.
• [X] [JAVA] Avro adapter benchmark only runs once in JMH
• [X] [Java] Extract a common base class for avro converter consumers
• [X] [Java] Avro converter should convert attributes and props to FieldType metadata

_{Note: This issue was originally created as ARROW-5845. Please see the migration documentation for further details.}

[asfimport]

Ji Liu / @tianchen92: Thanks [~emkornfield@gmail.com] , I closed this umbrella issue.

[asfimport]

Micah Kornfield / @emkornfield: Thanks @tianchen92.  I think there is still probably room for improvement of functionality and performance.  If you are interested in still doing work in this area I can create a new set of JIRAs.

[asfimport]

Ji Liu / @tianchen92: [~emkornfield@gmail.com] Sure, I think you could just create JIRAs under this one and I would taking them when available, thanks. 

[asfimport]

Todd Farmer / @toddfarmer: This issue was last updated over 90 days ago, which may be an indication it is no longer being actively worked. To better reflect the current state, the issue is being unassigned. Please feel free to re-take assignment of the issue if it is being actively worked, or if you plan to start that work soon.