1 files changed, 41 insertions, 0 deletions
diff --git a/src/arrow/ruby/red-arrow/lib/arrow/table-list-formatter.rb b/src/arrow/ruby/red-arrow/lib/arrow/table-list-formatter.rb
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+++ b/src/arrow/ruby/red-arrow/lib/arrow/table-list-formatter.rb
@@ -0,0 +1,41 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
+module Arrow
+  # TODO: Almost codes should be implemented in Apache Arrow C++.
+  class TableListFormatter < TableFormatter
+    private
+    def format_header(text, columns)
+    end
+
+    def format_rows(text, column_formatters, rows, n_digits, start_offset)
+      rows.each_with_index do |row, nth_row|
+        text << ("=" * 20 + " #{start_offset + nth_row} " + "=" * 20 + "\n")
+        row.each_with_index do |column_value, nth_column|
+          column_formatter = column_formatters[nth_column]
+          formatted_name = column_formatter.name
+          formatted_value = column_formatter.format_value(column_value)
+          text << "#{formatted_name}: #{formatted_value}\n"
+        end
+      end
+    end
+
+    def format_ellipsis(text)
+      text << "...\n"
+    end
+  end
+end