pvary commented on a change in pull request #1430:
URL: https://github.com/apache/iceberg/pull/1430#discussion_r485035182
##########
File path: api/src/main/java/org/apache/iceberg/Metrics.java
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@@ -120,4 +124,83 @@ public Long recordCount() {
public Map<Integer, ByteBuffer> upperBounds() {
return upperBounds;
}
+
+ /**
+ * Implemented the method to enable serialization of ByteBuffers.
+ * @param out The stream where to write
+ * @throws IOException On serialization error
+ */
+ private void writeObject(ObjectOutputStream out) throws IOException {
+ out.writeObject(rowCount);
+ out.writeObject(columnSizes);
+ out.writeObject(valueCounts);
+ out.writeObject(nullValueCounts);
+
+ writeByteBufferMap(out, lowerBounds);
+ writeByteBufferMap(out, upperBounds);
+ }
+
+ private static void writeByteBufferMap(ObjectOutputStream out, Map<Integer,
ByteBuffer> byteBufferMap)
+ throws IOException {
+ if (byteBufferMap == null) {
+ out.writeInt(-1);
+
+ } else {
+ // Write the size
+ out.writeInt(byteBufferMap.size());
+
+ for (Map.Entry<Integer, ByteBuffer> entry : byteBufferMap.entrySet()) {
+ // Write the key
+ out.writeObject(entry.getKey());
+
+ // Write the value
+ if (entry.getValue() != null) {
+ out.writeObject(entry.getValue().array());
Review comment:
Maybe just checking the hasArray and checking that the offset is 0 would
be enough. And throw an exception in other cases. Maybe we can avoid the costly
buffer allocation. Or use them only when they are needed.
Good that you brought this up. Started to fix this warning, but then got
sidetracked 😄
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