unical1988 commented on code in PR #728:
URL: https://github.com/apache/incubator-xtable/pull/728#discussion_r2269892034


##########
xtable-core/src/main/java/org/apache/xtable/reflection/ReflectionUtils.java:
##########
@@ -43,17 +44,31 @@ public static <T> T createInstanceOfClass(String className, 
Object... constructo
       if (constructorArgs.length == 0) {
         return clazz.newInstance();
       }
-      Class<?>[] constructorArgTypes =
+      /*Class<?>[] constructorArgTypes =

Review Comment:
   The iceberb sync error is at IcebergePartitionSpecExtractor (cannot find 
column date): 
   
   ```
   public PartitionSpec toIceberg(List<InternalPartitionField> partitionFields, 
Schema tableSchema) {
       if (partitionFields == null || partitionFields.isEmpty()) {
         return PartitionSpec.unpartitioned();
       }
       PartitionSpec.Builder partitionSpecBuilder = 
PartitionSpec.builderFor(tableSchema);
       for (InternalPartitionField partitioningField : partitionFields) {
         String fieldPath = partitioningField.getSourceField().getPath();
         switch (partitioningField.getTransformType()) {
           case YEAR:
             partitionSpecBuilder.year(fieldPath); //TODO check error here 
cannot find column
             break;
           case MONTH:
             partitionSpecBuilder.month(fieldPath);
             break;
           case DAY:
             partitionSpecBuilder.day(fieldPath);
             break;
           case HOUR:
             partitionSpecBuilder.hour(fieldPath);
             break;
           case VALUE:
             partitionSpecBuilder.identity(fieldPath);
             break;
           case BUCKET:
             partitionSpecBuilder.bucket(
                 fieldPath,
                 (int)
                     
partitioningField.getTransformOptions().get(InternalPartitionField.NUM_BUCKETS));
             break;
           default:
             throw new IllegalArgumentException(
                 "Unsupported type: " + partitioningField.getTransformType());
         }
       }
       return partitionSpecBuilder.build();
     }
   ```



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