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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 Arrow
class DenseUnionDataType
alias_method :initialize_raw, :initialize
private :initialize_raw
# Creates a new {Arrow::DenseUnionDataType}.
#
# @overload initialize(fields, type_codes)
#
# @param fields [::Array<Arrow::Field, Hash>] The fields of the
# dense union data type. You can mix {Arrow::Field} and field
# description in the fields.
#
# See {Arrow::Field.new} how to specify field description.
#
# @param type_codes [::Array<Integer>] The IDs that indicates
# corresponding fields.
#
# @example Create a dense union data type for `{2: visible, 9: count}`
# fields = [
# Arrow::Field.new("visible", :boolean),
# {
# name: "count",
# type: :int32,
# },
# ]
# Arrow::DenseUnionDataType.new(fields, [2, 9])
#
# @overload initialize(description)
#
# @param description [Hash] The description of the dense union
# data type. It must have `:fields` and `:type_codes` values.
#
# @option description [::Array<Arrow::Field, Hash>] :fields The
# fields of the dense union data type. You can mix
# {Arrow::Field} and field description in the fields.
#
# See {Arrow::Field.new} how to specify field description.
#
# @option description [::Array<Integer>] :type_codes The IDs
# that indicates corresponding fields.
#
# @example Create a dense union data type for `{2: visible, 9: count}`
# fields = [
# Arrow::Field.new("visible", :boolean),
# {
# name: "count",
# type: :int32,
# },
# ]
# Arrow::DenseUnionDataType.new(fields: fields,
# type_codes: [2, 9])
def initialize(*args)
n_args = args.size
case n_args
when 1
description = args[0]
fields = description[:fields]
type_codes = description[:type_codes]
when 2
fields, type_codes = args
else
message = "wrong number of arguments (given, #{n_args}, expected 1..2)"
raise ArgumentError, message
end
fields = fields.collect do |field|
field = Field.new(field) unless field.is_a?(Field)
field
end
initialize_raw(fields, type_codes)
end
end
end
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