| 325 | } |
| 326 | |
| 327 | std::shared_ptr<DataType> Infer( |
| 328 | const std::shared_ptr<Field>& unexpected_field) const override { |
| 329 | auto kind = Kind::FromTag(unexpected_field->metadata()); |
| 330 | switch (kind) { |
| 331 | case Kind::kNull: |
| 332 | return null(); |
| 333 | |
| 334 | case Kind::kBoolean: |
| 335 | return boolean(); |
| 336 | |
| 337 | case Kind::kNumber: |
| 338 | return int64(); |
| 339 | |
| 340 | case Kind::kString: |
| 341 | return timestamp(TimeUnit::SECOND); |
| 342 | |
| 343 | case Kind::kArray: { |
| 344 | const auto& type = checked_cast<const ListType&>(*unexpected_field->type()); |
| 345 | auto value_field = type.value_field(); |
| 346 | return list(value_field->WithType(Infer(value_field))); |
| 347 | } |
| 348 | case Kind::kObject: { |
| 349 | auto fields = unexpected_field->type()->fields(); |
| 350 | for (auto& field : fields) { |
| 351 | field = field->WithType(Infer(field)); |
| 352 | } |
| 353 | return struct_(std::move(fields)); |
| 354 | } |
| 355 | default: |
| 356 | return nullptr; |
| 357 | } |
| 358 | } |
| 359 | |
| 360 | std::shared_ptr<DataType> Promote( |
| 361 | const std::shared_ptr<DataType>& failed, |