How to use

ValueReaders$StructReader

in

com.netflix.iceberg.avro

@Override
public ValueReader<?> array(Schema array, ValueReader<?> elementReader) {
 if (array.getLogicalType() instanceof LogicalMap) {
  ValueReaders.StructReader<?> keyValueReader = (ValueReaders.StructReader) elementReader;
  ValueReader<?> keyReader = keyValueReader.reader(0);
  ValueReader<?> valueReader = keyValueReader.reader(1);
  return ValueReaders.arrayMap(keyReader, valueReader);
 }
 return ValueReaders.array(elementReader);
}

 @Override
 public S read(Decoder decoder, Object reuse) throws IOException {
  S struct = reuseOrCreate(reuse);
  if (decoder instanceof ResolvingDecoder) {
   // this may not set all of the fields. nulls are set by default.
   for (org.apache.avro.Schema.Field field : ((ResolvingDecoder) decoder).readFieldOrder()) {
    Object reusedValue = get(struct, field.pos());
    set(struct, field.pos(), readers[field.pos()].read(decoder, reusedValue));
   }
  } else {
   for (int i = 0; i < readers.length; i += 1) {
    Object reusedValue = get(struct, i);
    set(struct, i, readers[i].read(decoder, reusedValue));
   }
  }
  return struct;
 }
}

@Override
public ValueReader<?> array(Schema array, ValueReader<?> elementReader) {
 if (array.getLogicalType() instanceof LogicalMap) {
  ValueReaders.StructReader<?> keyValueReader = (ValueReaders.StructReader) elementReader;
  ValueReader<?> keyReader = keyValueReader.reader(0);
  ValueReader<?> valueReader = keyValueReader.reader(1);
  if (keyReader == ValueReaders.utf8s()) {
   return ValueReaders.arrayMap(ValueReaders.strings(), valueReader);
  }
  return ValueReaders.arrayMap(keyReader, valueReader);
 }
 return ValueReaders.array(elementReader);
}