Details
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New Feature
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Status: Reopened
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Major
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Resolution: Unresolved
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None
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None
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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 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.
