ajantha-bhat commented on code in PR #9419:
URL: https://github.com/apache/iceberg/pull/9419#discussion_r1442771024


##########
api/src/main/java/org/apache/iceberg/util/CharSequenceSet.java:
##########
@@ -166,6 +166,7 @@ public void clear() {
     wrapperSet.clear();
   }
 
+  @SuppressWarnings("CollectionUndefinedEquality")

Review Comment:
   `containsAll` uses `CharSequenceWrapper` for equals to ensure consistent
    hashing and equals behaviour similar to `CharSequenceMap` (javadoc of 
`CharSequenceMap` explains it). But the tool is unable to figure it out I 
guess. Hence, suppressing here and below two places. 



##########
api/src/main/java/org/apache/iceberg/util/CharSequenceWrapper.java:
##########
@@ -54,7 +54,7 @@ public boolean equals(Object other) {
     CharSequenceWrapper that = (CharSequenceWrapper) other;
 
     if (wrapped instanceof String && that.wrapped instanceof String) {
-      return wrapped.equals(that.wrapped);
+      return wrapped.toString().contentEquals(that.wrapped);

Review Comment:
   see 
   
[https://errorprone.info/bugpattern/UndefinedEquals](https://errorprone.info/bugpattern/UndefinedEquals)
 check For CharSequence



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