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# 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 ArrowDataset
module ArrowTableSavable
private
def save_to_uri
format = FileFormat.resolve(@options[:format])
options = FileSystemDatasetWriteOptions.new
options.file_write_options = format.default_write_options
path = @output.path
if @output.scheme.nil?
options.file_system = Arrow::LocalFileSystem.new
else
options.file_system = Arrow::FileSystem.create(@output.to_s)
# /C:/... -> C:/...
unless File.expand_path(".").start_with?("/")
path = path.gsub(/\A\//, "")
end
end
partitioning = @options[:partitioning]
if partitioning
# TODO
options.base_dir = File.dirname(path)
options.base_name_template = File.basename(path)
options.partitioning = Partitioning.resolve(@options[:partitioning])
scanner_builder = ScannerBuilder.new(@table)
scanner_builder.use_async(true)
scanner = scanner_builder.finish
FileSystemDataset.write_scanner(scanner, options)
else
dir = File.dirname(path)
unless File.exist?(dir)
options.file_system.create_dir(dir, true)
end
options.file_system.open_output_stream(path) do |output_stream|
format.open_writer(output_stream,
options.file_system,
path,
@table.schema,
format.default_write_options) do |writer|
reader = Arrow::TableBatchReader.new(@table)
writer.write_record_batch_reader(reader)
end
end
end
end
end
end
module Arrow
class TableSaver
include ArrowDataset::ArrowTableSavable
end
end
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