[jira] [Updated] (ARROW-5845) [Java] Implement converter between Arrow record batches and Avro records

["Ji Liu (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/ARROW-5845?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ji Liu updated ARROW-5845:
--------------------------
    Description: 
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 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);
 }

 

> [Java] Implement converter between Arrow record batches and Avro records
> ------------------------------------------------------------------------
>
>                 Key: ARROW-5845
>                 URL: https://issues.apache.org/jira/browse/ARROW-5845
>             Project: Apache Arrow
>          Issue Type: New Feature
>          Components: Java
>            Reporter: Ji Liu
>            Assignee: Ji Liu
>            Priority: Minor
>
> 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 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);
>  }
>  



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