Class: Arrow::Schema

Inherits:
Object
  • Object
show all
Includes:
FieldContainable
Defined in:
lib/arrow/schema.rb

Instance Method Summary collapse

Methods included from FieldContainable

#find_field

Constructor Details

#initialize(fields) ⇒ Schema #initialize(fields) ⇒ Schema

Creates a new Arrow::Schema.

Overloads:

  • #initialize(fields) ⇒ Schema

    Examples:

    Create a schema with Fields

    visible_field = Arrow::Field.new("visible", :boolean)
Arrow::Schema.new([visible_field])

    Create a schema with field descriptions

    visible_field_description = {
  name: "visible",
  data_type: :boolean,
}
Arrow::Schema.new([visible_field_description])

    Create a schema with Fields and field descriptions

    fields = [
  Arrow::Field.new("visible", :boolean),
  {
    name: "count",
    type: :int32,
  },
]
Arrow::Schema.new(fields)
  • #initialize(fields) ⇒ Schema

    Examples:

    Create a schema with fields

    fields = {
  "visible" => Arrow::BooleanDataType.new,
  :count => :int32,
  :tags => {
    type: :list,
    field: {
      name: "tag",
      type: :string,
    },
  },
}
Arrow::Schema.new(fields)



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# File 'lib/arrow/schema.rb', line 80

def initialize(fields)
  case fields
  when ::Array
    fields = fields.collect do |field|
      field = Field.new(field) unless field.is_a?(Field)
      field
    end
  when Hash
    fields = fields.collect do |name, data_type|
      Field.new(name, data_type)
    end
  end
  initialize_raw(fields)
end