sknop commented on a change in pull request #9950:
URL: https://github.com/apache/kafka/pull/9950#discussion_r580882032



##########
File path: 
connect/transforms/src/main/java/org/apache/kafka/connect/transforms/Cast.java
##########
@@ -364,11 +365,31 @@ private static String castToString(Object value) {
         if (value instanceof java.util.Date) {
             java.util.Date dateValue = (java.util.Date) value;
             return Values.dateFormatFor(dateValue).format(dateValue);
+        } else if (value instanceof ByteBuffer) {
+            ByteBuffer byteBuffer = (ByteBuffer) value;
+            if (byteBuffer.hasArray()) {
+                return castByteArrayToString(byteBuffer.array());
+            }
+            else {
+                byte[] array = new byte[byteBuffer.remaining()];
+                byteBuffer.get(array);
+                return castByteArrayToString(array);
+            }

Review comment:
       This sounds like an excellent plan and passes the tests.




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