Class: EnumTable::Reflection

Inherits:
Object
  • Object
show all
Defined in:
lib/enum_table/reflection.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(name, options = {}) ⇒ Reflection

Returns a new instance of Reflection.



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# 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

Instance Attribute Details

#id_name ⇒ Object

Returns the value of attribute id_name.



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# File 'lib/enum_table/reflection.rb', line 30

def id_name
  @id_name
end

#name ⇒ Object (readonly)

Returns the value of attribute name.



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# File 'lib/enum_table/reflection.rb', line 29

def name
  @name
end

#type ⇒ Object

Returns the value of attribute type.



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# File 'lib/enum_table/reflection.rb', line 30

def type
  @type
end

Instance Method Details

#add_value(id, value) ⇒ Object 



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# 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) ⇒ Object 



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# 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) ⇒ Object 



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# 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) ⇒ Object 



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# File 'lib/enum_table/reflection.rb', line 32

def to_populate(&block)
  @populate_procs << block
end

#value(id) ⇒ Object 



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# File 'lib/enum_table/reflection.rb', line 53

def value(id)
  ensure_populated
  @ids_to_values[id]
end

#values ⇒ Object 



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# File 'lib/enum_table/reflection.rb', line 58

def values
  ensure_populated
  @values_to_ids.keys
end