Copilot commented on code in PR #18434:
URL: https://github.com/apache/pinot/pull/18434#discussion_r3199670241


##########
pinot-plugins/pinot-input-format/pinot-arrow/src/test/java/org/apache/pinot/plugin/inputformat/arrow/ArrowRecordReaderTest.java:
##########
@@ -38,72 +36,64 @@
 import org.apache.arrow.vector.types.FloatingPointPrecision;
 import org.apache.arrow.vector.types.pojo.ArrowType;
 import org.apache.arrow.vector.types.pojo.Field;
-import org.apache.arrow.vector.types.pojo.FieldType;
 import org.apache.arrow.vector.types.pojo.Schema;
-import org.apache.pinot.spi.data.FieldSpec;
 import org.apache.pinot.spi.data.readers.AbstractRecordReaderTest;
-import org.apache.pinot.spi.data.readers.GenericRow;
-import org.apache.pinot.spi.data.readers.PrimaryKey;
 import org.apache.pinot.spi.data.readers.RecordReader;
-import org.testng.Assert;
 import org.testng.SkipException;
 import org.testng.annotations.Test;
 
+import static org.apache.arrow.vector.types.pojo.FieldType.nullable;
+
 
 public class ArrowRecordReaderTest extends AbstractRecordReaderTest {
   private static final int ROWS_PER_BATCH = 1000;
 
   @Override
   protected RecordReader createRecordReader(File file)
-      throws Exception {
+      throws IOException {
     ArrowRecordReader recordReader = new ArrowRecordReader();
     recordReader.init(file, _sourceFields, null);
     return recordReader;
   }
 
   @Override
   protected void writeRecordsToFile(List<Map<String, Object>> recordsToWrite)
-      throws Exception {
+      throws IOException {
     // Single-value fields
-    Field dimSvInt = new Field("dim_sv_int", FieldType.nullable(new 
ArrowType.Int(32, true)), null);
-    Field dimSvLong = new Field("dim_sv_long", FieldType.nullable(new 
ArrowType.Int(64, true)), null);
+    Field dimSvInt = new Field("dim_sv_int", nullable(new ArrowType.Int(32, 
true)), null);
+    Field dimSvLong = new Field("dim_sv_long", nullable(new ArrowType.Int(64, 
true)), null);
     Field dimSvFloat =
-        new Field("dim_sv_float", FieldType.nullable(new 
ArrowType.FloatingPoint(FloatingPointPrecision.SINGLE)), null);
+        new Field("dim_sv_float", nullable(new 
ArrowType.FloatingPoint(FloatingPointPrecision.SINGLE)), null);
     Field dimSvDouble =
-        new Field("dim_sv_double", FieldType.nullable(new 
ArrowType.FloatingPoint(FloatingPointPrecision.DOUBLE)),
-            null);
-    Field dimSvString = new Field("dim_sv_string", FieldType.nullable(new 
ArrowType.Utf8()), null);
+        new Field("dim_sv_double", nullable(new 
ArrowType.FloatingPoint(FloatingPointPrecision.DOUBLE)), null);
+    Field dimSvString = new Field("dim_sv_string", nullable(new 
ArrowType.Utf8()), null);
 
     // Multi-value fields (List vectors)
-    Field dimMvInt = new Field("dim_mv_int", FieldType.nullable(new 
ArrowType.List()),
-        Arrays.asList(new Field("$data$", FieldType.nullable(new 
ArrowType.Int(32, true)), null)));
-    Field dimMvLong = new Field("dim_mv_long", FieldType.nullable(new 
ArrowType.List()),
-        Arrays.asList(new Field("$data$", FieldType.nullable(new 
ArrowType.Int(64, true)), null)));
-    Field dimMvFloat = new Field("dim_mv_float", FieldType.nullable(new 
ArrowType.List()),
-        Arrays.asList(
-            new Field("$data$", FieldType.nullable(new 
ArrowType.FloatingPoint(FloatingPointPrecision.SINGLE)), null)));
-    Field dimMvDouble = new Field("dim_mv_double", FieldType.nullable(new 
ArrowType.List()),
-        Arrays.asList(
-            new Field("$data$", FieldType.nullable(new 
ArrowType.FloatingPoint(FloatingPointPrecision.DOUBLE)), null)));
-    Field dimMvString = new Field("dim_mv_string", FieldType.nullable(new 
ArrowType.List()),
-        Arrays.asList(new Field("$data$", FieldType.nullable(new 
ArrowType.Utf8()), null)));
+    Field dimMvInt = new Field("dim_mv_int", nullable(new ArrowType.List()),
+        List.of(new Field("$data$", nullable(new ArrowType.Int(32, true)), 
null)));
+    Field dimMvLong = new Field("dim_mv_long", nullable(new ArrowType.List()),
+        List.of(new Field("$data$", nullable(new ArrowType.Int(64, true)), 
null)));
+    Field dimMvFloat = new Field("dim_mv_float", nullable(new 
ArrowType.List()),
+        List.of(new Field("$data$", nullable(new 
ArrowType.FloatingPoint(FloatingPointPrecision.SINGLE)), null)));
+    Field dimMvDouble = new Field("dim_mv_double", nullable(new 
ArrowType.List()),
+        List.of(new Field("$data$", nullable(new 
ArrowType.FloatingPoint(FloatingPointPrecision.DOUBLE)), null)));
+    Field dimMvString = new Field("dim_mv_string", nullable(new 
ArrowType.List()),
+        List.of(new Field("$data$", nullable(new ArrowType.Utf8()), null)));
 
     // Metric fields
-    Field metInt = new Field("met_int", FieldType.nullable(new 
ArrowType.Int(32, true)), null);
-    Field metLong = new Field("met_long", FieldType.nullable(new 
ArrowType.Int(64, true)), null);
-    Field metFloat =
-        new Field("met_float", FieldType.nullable(new 
ArrowType.FloatingPoint(FloatingPointPrecision.SINGLE)), null);
+    Field metInt = new Field("met_int", nullable(new ArrowType.Int(32, true)), 
null);
+    Field metLong = new Field("met_long", nullable(new ArrowType.Int(64, 
true)), null);
+    Field metFloat = new Field("met_float", nullable(new 
ArrowType.FloatingPoint(FloatingPointPrecision.SINGLE)), null);
     Field metDouble =
-        new Field("met_double", FieldType.nullable(new 
ArrowType.FloatingPoint(FloatingPointPrecision.DOUBLE)), null);
+        new Field("met_double", nullable(new 
ArrowType.FloatingPoint(FloatingPointPrecision.DOUBLE)), null);
 
     Schema schema = new Schema(
-        Arrays.asList(dimSvInt, dimSvLong, dimSvFloat, dimSvDouble, 
dimSvString, dimMvInt, dimMvLong, dimMvFloat,
-            dimMvDouble, dimMvString, metInt, metLong, metFloat, metDouble));
+        List.of(dimSvInt, dimSvLong, dimSvFloat, dimSvDouble, dimSvString, 
dimMvInt, dimMvLong, dimMvFloat, dimMvDouble,
+            dimMvString, metInt, metLong, metFloat, metDouble));
 
     try (RootAllocator allocator = new RootAllocator();
         VectorSchemaRoot root = VectorSchemaRoot.create(schema, allocator);
-        FileOutputStream fos = new FileOutputStream(_dataFile);
-        FileChannel channel = fos.getChannel();
+        FileOutputStream fos = new FileOutputStream(_dataFile); FileChannel 
channel = fos.getChannel();

Review Comment:
   In the try-with-resources header, `FileOutputStream fos = ...; FileChannel 
channel = fos.getChannel();` is written as two resource declarations on a 
single line. This is hard to read and may violate the project's 
formatting/checkstyle rules for one-statement-per-line in resource lists. 
Please split `fos` and `channel` into separate entries (each on its own line) 
within the try-with-resources declaration.
   



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