GH-37651: [C#] expose ArrowArrayConcatenator.Concatenate (#37652)

### Rationale for this change New C# drivers need the ability to concatenate arrays, particularly for metadata calls. ### What changes are included in this PR? Converts a previously internal class and method to a public class and method. ### Are these changes tested? No substantive product changes were made. All tests still pass. ### Are there any user-facing changes? It exposes previously hidden functionality. Resolves #37651 * Closes: #37651 Lead-authored-by: David Coe <[email protected]> Co-authored-by: davidhcoe <[email protected]> Signed-off-by: David Li <[email protected]>
apache · Oct 6, 2023 · 0d89741 · 0d89741
1 parent fdecb6a
commit 0d89741
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Showing 2 changed files with 6 additions and 17 deletions.
diff --git a/csharp/src/Apache.Arrow/Arrays/ArrowArrayConcatenator.cs b/csharp/src/Apache.Arrow/Arrays/ArrowArrayConcatenator.cs
@@ -18,9 +18,9 @@
 
 namespace Apache.Arrow
 {
-    static class ArrowArrayConcatenator
+    public static class ArrowArrayConcatenator
     {
-        internal static IArrowArray Concatenate(IReadOnlyList<IArrowArray> arrowArrayList , MemoryAllocator allocator = default)
+        public static IArrowArray Concatenate(IReadOnlyList<IArrowArray> arrowArrayList , MemoryAllocator allocator = default)
         {
             if(arrowArrayList == null || arrowArrayList.Count == 0)
             {

diff --git a/csharp/test/Apache.Arrow.Tests/ArrowArrayConcatenatorTests.cs b/csharp/test/Apache.Arrow.Tests/ArrowArrayConcatenatorTests.cs
@@ -30,23 +30,23 @@ public void TestStandardCases()
         {
             foreach ((List<IArrowArray> testTargetArrayList, IArrowArray expectedArray) in GenerateTestData())
             {
-                IArrowArray actualArray = ArrowArrayConcatenatorReflector.InvokeConcatenate(testTargetArrayList);
+                IArrowArray actualArray = ArrowArrayConcatenator.Concatenate(testTargetArrayList);
                 ArrowReaderVerifier.CompareArrays(expectedArray, actualArray);
             }
         }
 
         [Fact]
         public void TestNullOrEmpty()
         {
-            Assert.Null(ArrowArrayConcatenatorReflector.InvokeConcatenate(null));
-            Assert.Null(ArrowArrayConcatenatorReflector.InvokeConcatenate(new List<IArrowArray>()));
+            Assert.Null(ArrowArrayConcatenator.Concatenate(null));
+            Assert.Null(ArrowArrayConcatenator.Concatenate(new List<IArrowArray>()));
         }
 
         [Fact]
         public void TestSingleElement()
         {
             Int32Array array = new Int32Array.Builder().Append(1).Append(2).Build();
-            IArrowArray actualArray = ArrowArrayConcatenatorReflector.InvokeConcatenate(new[] { array });
+            IArrowArray actualArray = ArrowArrayConcatenator.Concatenate(new[] { array });
             ArrowReaderVerifier.CompareArrays(array, actualArray);
         }
 
@@ -107,17 +107,6 @@ private static IEnumerable<Tuple<List<IArrowArray>, IArrowArray>> GenerateTestDa
             }
         }
 
-        private static class ArrowArrayConcatenatorReflector
-        {
-            private static readonly MethodInfo s_concatenateInfo = typeof(ArrayData).Assembly.GetType("Apache.Arrow.ArrowArrayConcatenator")
-                .GetMethod("Concatenate", BindingFlags.Static | BindingFlags.NonPublic);
-
-            internal static IArrowArray InvokeConcatenate(IReadOnlyList<IArrowArray> arrowArrayList, MemoryAllocator allocator = default)
-            {
-                return s_concatenateInfo.Invoke(null, new object[] { arrowArrayList, allocator }) as IArrowArray;
-            }
-        }
-
         private class TestDataGenerator :
             IArrowTypeVisitor<BooleanType>,
             IArrowTypeVisitor<Int8Type>,