[GitHub] [incubator-hudi] yanghua commented on a change in pull request #1440: [HUDI-731] Add ChainedTransformer

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yanghua commented on a change in pull request #1440: [HUDI-731] Add ChainedTransformer
URL: https://github.com/apache/incubator-hudi/pull/1440#discussion_r396870236
 
 

 ##########
 File path: hudi-utilities/src/main/java/org/apache/hudi/utilities/transform/ChainedTransformer.java
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 @@ -0,0 +1,30 @@
+package org.apache.hudi.utilities.transform;
+
+import org.apache.hudi.common.util.TypedProperties;
+
+import org.apache.spark.api.java.JavaSparkContext;
+import org.apache.spark.sql.Dataset;
+import org.apache.spark.sql.Row;
+import org.apache.spark.sql.SparkSession;
+
+import java.util.List;
+import java.util.function.Supplier;
+
+/**
+ * An abstract {@link Transformer} to chain other {@link Transformer}s and apply sequentially.
+ * <p>
+ * A subclass is to supply a {@link List} of {@link Transformer}s in desired sequence.
+ */
+public abstract class ChainedTransformer implements Transformer {
 
 Review comment:
   It's a user-faced feature, we'd better to describe it in the documentation. WDYT?

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