geruh commented on code in PR #14702:
URL: https://github.com/apache/iceberg/pull/14702#discussion_r2572924506
##########
core/src/main/java/org/apache/iceberg/ContentFileParser.java:
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@@ -301,4 +291,55 @@ private static Metrics metricsFromJson(JsonNode jsonNode) {
lowerBounds,
upperBounds);
}
+
+ private static void partitionToJson(
+ Types.StructType partitionType, StructLike partitionData, JsonGenerator
generator)
+ throws IOException {
+ generator.writeStartArray();
+ List<Types.NestedField> fields = partitionType.fields();
+ for (int pos = 0; pos < fields.size(); ++pos) {
+ Types.NestedField field = fields.get(pos);
+ Object partitionValue = partitionData.get(pos, Object.class);
+ SingleValueParser.toJson(field.type(), partitionValue, generator);
+ }
+ generator.writeEndArray();
+ }
+
+ private static PartitionData partitionFromJson(
+ Types.StructType partitionType, JsonNode partitionNode) {
+ List<Types.NestedField> fields = partitionType.fields();
+ PartitionData partitionData = new PartitionData(partitionType);
+
+ if (partitionNode.isArray()) {
+ Preconditions.checkArgument(
+ partitionNode.size() == fields.size(),
+ "Invalid partition data size: expected = %s, actual = %s",
+ fields.size(),
+ partitionNode.size());
+
+ for (int pos = 0; pos < fields.size(); ++pos) {
+ Types.NestedField field = fields.get(pos);
+ Object partitionValue = SingleValueParser.fromJson(field.type(),
partitionNode.get(pos));
+ partitionData.set(pos, partitionValue);
+ }
+ } else if (partitionNode.isObject()) {
+ // Handle legacy partition object serialization
+ for (int pos = 0; pos < fields.size(); ++pos) {
+ Types.NestedField field = fields.get(pos);
+ String fieldId = String.valueOf(field.fieldId());
+ if (partitionNode.has(fieldId)) {
+ Object partitionValue =
+ SingleValueParser.fromJson(field.type(),
partitionNode.get(fieldId));
+ partitionData.set(pos, partitionValue);
+ }
+ }
Review Comment:
Yeah I agree, but the structlike tracks the schema size so we can just
follow what the array comparison does
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