lukecwik commented on a change in pull request #13166:
URL: https://github.com/apache/beam/pull/13166#discussion_r510266391
##########
File path:
sdks/java/io/hadoop-format/src/main/java/org/apache/beam/sdk/io/hadoop/format/HadoopFormatIO.java
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@@ -437,6 +445,12 @@
.build();
}
+ /** Transforms the keys read from the source using the given key
translation function. */
+ public Read<K, V> withKeyTranslation(SimpleFunction<?, K> function,
Coder<K> coder) {
Review comment:
Since we don't need the type information anymore, we should use
SerializableFunction instead of SimpleFunction. SimpleFunction implements
SerializableFunction so this change enables using simpler lambdas.
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