jolshan commented on code in PR #13247:
URL: https://github.com/apache/kafka/pull/13247#discussion_r1350759368


##########
tools/src/test/java/org/apache/kafka/tools/reassign/ReassignPartitionsIntegrationTest.java:
##########
@@ -857,68 +864,18 @@ public void close() {
         }
     }
 
-    private ReassignPartitionsCommand.VerifyAssignmentResult 
asScala(VerifyAssignmentResult res) {
-        Map<TopicPartition, 
ReassignPartitionsCommand.PartitionReassignmentState> partStates = new 
HashMap<>();
-        res.partStates.forEach((tp, state) -> partStates.put(tp, 
asScala(state)));
-
-        Map<TopicPartitionReplica, ReassignPartitionsCommand.LogDirMoveState> 
moveStates = new HashMap<>();
-        res.moveStates.forEach((tpr, state) -> moveStates.put(tpr, 
asScala(state)));
-
-        return new 
ReassignPartitionsCommand.VerifyAssignmentResult(asScala(partStates), 
res.partsOngoing, asScala(moveStates), res.movesOngoing);
-    }
-
-    @SuppressWarnings({"unchecked"})
-    private ReassignPartitionsCommand.PartitionReassignmentState 
asScala(PartitionReassignmentState state) {
-        return new ReassignPartitionsCommand.PartitionReassignmentState(
-            seq((List) state.currentReplicas),
-            seq((List) state.targetReplicas),
-            state.done
-        );
-    }
-
-    private ReassignPartitionsCommand.LogDirMoveState asScala(LogDirMoveState 
state) {
-        if (state instanceof ActiveMoveState) {
-            ActiveMoveState s = (ActiveMoveState) state;
-            return new 
ReassignPartitionsCommand.ActiveMoveState(s.currentLogDir, s.targetLogDir, 
s.futureLogDir);
-        } else if (state instanceof CancelledMoveState) {
-            CancelledMoveState s = (CancelledMoveState) state;
-            return new 
ReassignPartitionsCommand.CancelledMoveState(s.currentLogDir, s.targetLogDir);
-        } else if (state instanceof CompletedMoveState) {
-            CompletedMoveState s = (CompletedMoveState) state;
-            return new 
ReassignPartitionsCommand.CompletedMoveState(s.targetLogDir);
-        } else if (state instanceof MissingLogDirMoveState) {
-            MissingLogDirMoveState s = (MissingLogDirMoveState) state;
-            return new 
ReassignPartitionsCommand.MissingLogDirMoveState(s.targetLogDir);
-        } else if (state instanceof MissingReplicaMoveState) {
-            MissingReplicaMoveState s = (MissingReplicaMoveState) state;
-            return new 
ReassignPartitionsCommand.MissingReplicaMoveState(s.targetLogDir);
-        }
-
-        throw new IllegalArgumentException("Unknown state " + state);
-    }
-
     @SuppressWarnings("unchecked")
-    static <T> scala.collection.immutable.Set<T> set(final T... set) {
-        return mutableSet(set).toSet();
+    static <T> Set<T> set(final T... set) {
+        return new HashSet<>(Arrays.asList(set));

Review Comment:
   Got it. Thanks for clarifying. (That's going to be a fun one to migrate too 
😅 )



##########
tools/src/test/java/org/apache/kafka/tools/reassign/ReassignPartitionsIntegrationTest.java:
##########
@@ -857,68 +864,18 @@ public void close() {
         }
     }
 
-    private ReassignPartitionsCommand.VerifyAssignmentResult 
asScala(VerifyAssignmentResult res) {
-        Map<TopicPartition, 
ReassignPartitionsCommand.PartitionReassignmentState> partStates = new 
HashMap<>();
-        res.partStates.forEach((tp, state) -> partStates.put(tp, 
asScala(state)));
-
-        Map<TopicPartitionReplica, ReassignPartitionsCommand.LogDirMoveState> 
moveStates = new HashMap<>();
-        res.moveStates.forEach((tpr, state) -> moveStates.put(tpr, 
asScala(state)));
-
-        return new 
ReassignPartitionsCommand.VerifyAssignmentResult(asScala(partStates), 
res.partsOngoing, asScala(moveStates), res.movesOngoing);
-    }
-
-    @SuppressWarnings({"unchecked"})
-    private ReassignPartitionsCommand.PartitionReassignmentState 
asScala(PartitionReassignmentState state) {
-        return new ReassignPartitionsCommand.PartitionReassignmentState(
-            seq((List) state.currentReplicas),
-            seq((List) state.targetReplicas),
-            state.done
-        );
-    }
-
-    private ReassignPartitionsCommand.LogDirMoveState asScala(LogDirMoveState 
state) {
-        if (state instanceof ActiveMoveState) {
-            ActiveMoveState s = (ActiveMoveState) state;
-            return new 
ReassignPartitionsCommand.ActiveMoveState(s.currentLogDir, s.targetLogDir, 
s.futureLogDir);
-        } else if (state instanceof CancelledMoveState) {
-            CancelledMoveState s = (CancelledMoveState) state;
-            return new 
ReassignPartitionsCommand.CancelledMoveState(s.currentLogDir, s.targetLogDir);
-        } else if (state instanceof CompletedMoveState) {
-            CompletedMoveState s = (CompletedMoveState) state;
-            return new 
ReassignPartitionsCommand.CompletedMoveState(s.targetLogDir);
-        } else if (state instanceof MissingLogDirMoveState) {
-            MissingLogDirMoveState s = (MissingLogDirMoveState) state;
-            return new 
ReassignPartitionsCommand.MissingLogDirMoveState(s.targetLogDir);
-        } else if (state instanceof MissingReplicaMoveState) {
-            MissingReplicaMoveState s = (MissingReplicaMoveState) state;
-            return new 
ReassignPartitionsCommand.MissingReplicaMoveState(s.targetLogDir);
-        }
-
-        throw new IllegalArgumentException("Unknown state " + state);
-    }
-
     @SuppressWarnings("unchecked")
-    static <T> scala.collection.immutable.Set<T> set(final T... set) {
-        return mutableSet(set).toSet();
+    static <T> Set<T> set(final T... set) {
+        return new HashSet<>(Arrays.asList(set));

Review Comment:
   Got it. Thanks for clarifying. (That's going to be a fun one to migrate too 
😅 )



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