diff --git a/cpp/src/parquet/encryption/external/dbpa_enum_utils.cc b/cpp/src/parquet/encryption/external/dbpa_enum_utils.cc
index c5c824da5fda..4be95e6158f7 100644
--- a/cpp/src/parquet/encryption/external/dbpa_enum_utils.cc
+++ b/cpp/src/parquet/encryption/external/dbpa_enum_utils.cc
@@ -28,6 +28,8 @@ namespace parquet::encryption::external {
 // parquet::Type -> dbps::external::Type
 // Parquet types are coming from parquet/types.h
 // ------------------------------------------------------------
+// parquet::Type::UNDEFINED is excluded as it is not a
+// Parquet type per-se, but rather a value used in exception cases.
 const std::unordered_map<parquet::Type::type, dbps::external::Type::type>
     DBPAEnumUtils::parquet_to_external_type_map = {
         {parquet::Type::BOOLEAN, dbps::external::Type::BOOLEAN},
@@ -37,10 +39,8 @@ const std::unordered_map<parquet::Type::type, dbps::external::Type::type>
         {parquet::Type::FLOAT, dbps::external::Type::FLOAT},
         {parquet::Type::DOUBLE, dbps::external::Type::DOUBLE},
         {parquet::Type::BYTE_ARRAY, dbps::external::Type::BYTE_ARRAY},
-        {parquet::Type::FIXED_LEN_BYTE_ARRAY, dbps::external::Type::FIXED_LEN_BYTE_ARRAY}};
-        // parquet::Type::UNDEFINED is excluded as it is not a 
-        // Parquet type per-se, but rather a value used in exception cases.
-
+        {parquet::Type::FIXED_LEN_BYTE_ARRAY,
+         dbps::external::Type::FIXED_LEN_BYTE_ARRAY}};
 
 // ------------------------------------------------------------
 // arrow::Compression -> dbps::external::CompressionCodec
diff --git a/cpp/src/parquet/encryption/external/dbpa_enum_utils_test.cc b/cpp/src/parquet/encryption/external/dbpa_enum_utils_test.cc
index 387e722c7829..6ebdfaf01c98 100644
--- a/cpp/src/parquet/encryption/external/dbpa_enum_utils_test.cc
+++ b/cpp/src/parquet/encryption/external/dbpa_enum_utils_test.cc
@@ -106,7 +106,8 @@ TEST_F(DBPAUtilsTest, AllValidTypeMappings) {
     EXPECT_NO_THROW(DBPAEnumUtils::ParquetTypeToDBPA(parquet_type));
   }
 
-  EXPECT_THROW(DBPAEnumUtils::ParquetTypeToDBPA(parquet::Type::UNDEFINED), std::invalid_argument);
+  EXPECT_THROW(DBPAEnumUtils::ParquetTypeToDBPA(parquet::Type::UNDEFINED),
+               std::invalid_argument);
 }
 
 TEST_F(DBPAUtilsTest, AllValidCompressionMappings) {
@@ -131,11 +132,11 @@ TEST_F(DBPAUtilsTest, MapSizeAssertions) {
   // This provides a direct way to verify map completeness
 
   // Parquet::Type::type assertions
-  EXPECT_EQ(parquet_type_enum_size_, 9)
-      << "Expected 9 parquet type mappings";
+  EXPECT_EQ(parquet_type_enum_size_, 9) << "Expected 9 parquet type mappings";
 
   // Excluding UNDEFINED
-  EXPECT_EQ(parquet_type_enum_size_ - 1, DBPAEnumUtils::parquet_to_external_type_map.size())
+  EXPECT_EQ(parquet_type_enum_size_ - 1,
+            DBPAEnumUtils::parquet_to_external_type_map.size())
       << "Expected 9 parquet type mappings (excluding UNDEFINED)";
 
   // Excluding UNDEFINED