(arrow) branch main updated: GH-48916: [Ruby] Add support for writing binary array (#48917)

[kou]

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The following commit(s) were added to refs/heads/main by this push:
     new b29b786ed3 GH-48916: [Ruby] Add support for writing binary array 
(#48917)
b29b786ed3 is described below

commit b29b786ed3d770a9d9765ee6b1ed221e887e9093
Author: Sutou Kouhei <k...@clear-code.com>
AuthorDate: Thu Jan 22 10:21:02 2026 +0900

    GH-48916: [Ruby] Add support for writing binary array (#48917)
    
    ### Rationale for this change
    
    It's a variable size binary layout array.
    
    ### What changes are included in this PR?
    
    * Add `ArrowFormat::BinaryType#to_flatbuffers`
    
    ### Are these changes tested?
    
    Yes.
    
    ### Are there any user-facing changes?
    
    Yes.
    * GitHub Issue: #48916
    
    Authored-by: Sutou Kouhei <k...@clear-code.com>
    Signed-off-by: Sutou Kouhei <k...@clear-code.com>
---
 ruby/red-arrow-format/lib/arrow-format/type.rb | 10 +++++++++-
 ruby/red-arrow-format/test/test-writer.rb      | 18 ++++++++++++++++++
 2 files changed, 27 insertions(+), 1 deletion(-)

diff --git a/ruby/red-arrow-format/lib/arrow-format/type.rb 
b/ruby/red-arrow-format/lib/arrow-format/type.rb
index 109d944254..4e70dedbf7 100644
--- a/ruby/red-arrow-format/lib/arrow-format/type.rb
+++ b/ruby/red-arrow-format/lib/arrow-format/type.rb
@@ -482,7 +482,15 @@ module ArrowFormat
     end
 
     def build_array(size, validity_buffer, offsets_buffer, values_buffer)
-      BinaryArray.new(self, size, validity_buffer, offsets_buffer, 
values_buffer)
+      BinaryArray.new(self,
+                      size,
+                      validity_buffer,
+                      offsets_buffer,
+                      values_buffer)
+    end
+
+    def to_flatbuffers
+      FB::Binary::Data.new
     end
   end
 
diff --git a/ruby/red-arrow-format/test/test-writer.rb 
b/ruby/red-arrow-format/test/test-writer.rb
index f2313e64a7..240aab7a7f 100644
--- a/ruby/red-arrow-format/test/test-writer.rb
+++ b/ruby/red-arrow-format/test/test-writer.rb
@@ -26,6 +26,8 @@ module WriterTests
       ArrowFormat::Int8Type.singleton
     when Arrow::UInt8DataType
       ArrowFormat::UInt8Type.singleton
+    when Arrow::BinaryDataType
+      ArrowFormat::BinaryType.singleton
     else
       raise "Unsupported type: #{red_arrow_type.inspect}"
     end
@@ -45,6 +47,11 @@ module WriterTests
       type.build_array(red_arrow_array.size,
                        convert_buffer(red_arrow_array.null_bitmap),
                        convert_buffer(red_arrow_array.data_buffer))
+    when ArrowFormat::VariableSizeBinaryType
+      type.build_array(red_arrow_array.size,
+                       convert_buffer(red_arrow_array.null_bitmap),
+                       convert_buffer(red_arrow_array.offsets_buffer),
+                       convert_buffer(red_arrow_array.data_buffer))
     else
       raise "Unsupported array #{red_arrow_array.inspect}"
     end
@@ -96,6 +103,17 @@ module WriterTests
                          @values)
           end
         end
+
+        sub_test_case("Binary") do
+          def build_array
+            Arrow::BinaryArray.new(["Hello".b, nil, "World".b])
+          end
+
+          def test_write
+            assert_equal(["Hello".b, nil, "World".b],
+                         @values)
+          end
+        end
       end
     end
   end