class EnumTable::Reflection

Attributes

id_name[RW]
name[R]
type[RW]

Public Class Methods

new(name, options={}) click to toggle source
# File lib/enum_table/reflection.rb, line 3
def initialize(name, options={})
  @name = name
  @id_name = options[:id_name] || :"#{name}_id"
  @type = options[:type] || :symbol
  @type == :string || @type == :symbol or
    raise ArgumentError, "invalid type: #{type.inspect}"

  @strings_to_ids = {}
  @values_to_ids = {}
  @ids_to_values = {}
  @populate_procs = []
  @populated = false
end

Public Instance Methods

add_value(id, value) click to toggle source
# File lib/enum_table/reflection.rb, line 36
def add_value(id, value)
  @strings_to_ids[value.to_s] = id

  cast_value = @type == :string ? value.to_s : value.to_sym
  @values_to_ids[cast_value] = id
  @ids_to_values[id] = cast_value
end
id(value) click to toggle source
# File lib/enum_table/reflection.rb, line 44
def id(value)
  ensure_populated
  if value.is_a?(String) || type == :string
    @strings_to_ids[value.to_s.strip]
  else
    @values_to_ids[value]
  end
end
initialize_copy(other) click to toggle source
# File lib/enum_table/reflection.rb, line 17
def initialize_copy(other)
  @name = other.name
  @id_name = other.id_name
  @type = other.type

  @strings_to_ids = other.instance_variable_get(:@strings_to_ids).dup
  @values_to_ids = other.instance_variable_get(:@values_to_ids).dup
  @ids_to_values = other.instance_variable_get(:@ids_to_values).dup
  @populate_procs = other.instance_variable_get(:@populate_procs).dup
  @populated = false
end
to_populate(&block) click to toggle source
# File lib/enum_table/reflection.rb, line 32
def to_populate(&block)
  @populate_procs << block
end
value(id) click to toggle source
# File lib/enum_table/reflection.rb, line 53
def value(id)
  ensure_populated
  @ids_to_values[id]
end
values() click to toggle source
# File lib/enum_table/reflection.rb, line 58
def values
  ensure_populated
  @values_to_ids.keys
end

Private Instance Methods

ensure_populated() click to toggle source
# File lib/enum_table/reflection.rb, line 65
def ensure_populated
  return if @populated
  @populate_procs.each { |p| p.call(self) }
  @populate_procs.clear
  @populated = true
end