wgtmac commented on code in PR #124:
URL: https://github.com/apache/iceberg-cpp/pull/124#discussion_r2160631869
##########
src/iceberg/avro/avro_data_util.cc:
##########
@@ -17,16 +17,383 @@
* under the License.
*/
+#include <arrow/array/builder_binary.h>
+#include <arrow/array/builder_decimal.h>
+#include <arrow/array/builder_nested.h>
+#include <arrow/array/builder_primitive.h>
+#include <arrow/json/from_string.h>
+#include <arrow/type.h>
+#include <arrow/util/decimal.h>
+#include <avro/Generic.hh>
+#include <avro/Node.hh>
+#include <avro/Types.hh>
+
+#include "iceberg/arrow/arrow_error_transform_internal.h"
#include "iceberg/avro/avro_data_util_internal.h"
+#include "iceberg/avro/avro_schema_util_internal.h"
+#include "iceberg/schema.h"
+#include "iceberg/schema_util.h"
+#include "iceberg/util/checked_cast.h"
+#include "iceberg/util/macros.h"
namespace iceberg::avro {
+using ::iceberg::arrow::ToErrorKind;
+
+namespace {
+
+/// \brief Forward declaration for mutual recursion.
+Status AppendFieldToBuilder(const ::avro::NodePtr& avro_node,
+ const ::avro::GenericDatum& avro_datum,
+ const FieldProjection& projection,
+ const SchemaField& projected_field,
+ ::arrow::ArrayBuilder* array_builder);
+
+/// \brief Append Avro record data to Arrow struct builder.
+Status AppendStructToBuilder(const ::avro::NodePtr& avro_node,
+ const ::avro::GenericDatum& avro_datum,
+ const std::span<const FieldProjection>&
projections,
+ const StructType& struct_type,
+ ::arrow::ArrayBuilder* array_builder) {
+ if (avro_node->type() != ::avro::AVRO_RECORD) {
+ return InvalidArgument("Expected Avro record, got type: {}",
ToString(avro_node));
+ }
+ const auto& avro_record = avro_datum.value<::avro::GenericRecord>();
+
+ auto* struct_builder =
internal::checked_cast<::arrow::StructBuilder*>(array_builder);
+ ICEBERG_ARROW_RETURN_NOT_OK(struct_builder->Append());
+
+ for (size_t i = 0; i < projections.size(); ++i) {
+ const auto& field_projection = projections[i];
+ const auto& expected_field = struct_type.fields()[i];
+ auto* field_builder = struct_builder->field_builder(static_cast<int>(i));
+
+ if (field_projection.kind == FieldProjection::Kind::kProjected) {
+ size_t avro_field_index =
+ std::get<FieldProjection::SourceFieldIndex>(field_projection.from);
+ if (avro_field_index >= avro_record.fieldCount()) {
+ return InvalidArgument("Avro field index {} out of bound {}",
avro_field_index,
+ avro_record.fieldCount());
+ }
+
+ const auto& avro_field_node = avro_node->leafAt(avro_field_index);
+ const auto& avro_field_datum = avro_record.fieldAt(avro_field_index);
+ ICEBERG_RETURN_UNEXPECTED(AppendFieldToBuilder(avro_field_node,
avro_field_datum,
+ field_projection,
expected_field,
+ field_builder));
+ } else if (field_projection.kind == FieldProjection::Kind::kNull) {
+ ICEBERG_ARROW_RETURN_NOT_OK(field_builder->AppendNull());
+ } else {
+ return NotImplemented("Unsupported field projection kind: {}",
+ ToString(field_projection.kind));
+ }
+ }
+ return {};
+}
+
+/// \brief Append Avro array data to Arrow list builder.
+Status AppendListToBuilder(const ::avro::NodePtr& avro_node,
+ const ::avro::GenericDatum& avro_datum,
+ const FieldProjection& projection, const ListType&
list_type,
+ ::arrow::ArrayBuilder* array_builder) {
+ if (avro_node->type() != ::avro::AVRO_ARRAY) {
+ return InvalidArgument("Expected Avro array, got type: {}",
ToString(avro_node));
+ }
+ const auto& avro_array = avro_datum.value<::avro::GenericArray>();
+
+ auto* list_builder =
internal::checked_cast<::arrow::ListBuilder*>(array_builder);
Review Comment:
I don't think so. This is not supposed to be called by users.
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