Class: SimpleEnum::EnumHash

Inherits:
ActiveSupport::OrderedHash
  • Object
show all
Defined in:
lib/simple_enum/enum_hash.rb

Overview

Internal hash class, used to handle the enumerations et al. Works like to original Hash class, but with some added value, like access to

Instance Method Summary collapse

Constructor Details

#initialize(args = []) ⇒ EnumHash

Returns a new instance of EnumHash.



9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
 
# File 'lib/simple_enum/enum_hash.rb', line 9

def initialize(args = [])
  super()
  
  @reverse_sym_lookup = {}
  @sym_value_lookup = {}

  if args.is_a?(Hash)
    args.each { |k,v| set_value_for_reverse_lookup(k, v) }
  else
    ary = args.send(args.respond_to?(:enum_with_index) ? :enum_with_index : :each_with_index).to_a unless args.first.is_a?(ActiveRecord::Base) or args.first.is_a?(Array)
    ary = args.map { |e| [e, e.id] } if args.first.is_a?(ActiveRecord::Base)
    ary ||= args
    ary.each { |e| set_value_for_reverse_lookup(e[0], e[1]) }
  end
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(symbol, *args) ⇒ Object 



29
30
31
32
33
34
35
36
 
# File 'lib/simple_enum/enum_hash.rb', line 29

def method_missing(symbol, *args)
  if @sym_value_lookup.has_key?(symbol.to_enum_sym)
    return @reverse_sym_lookup[symbol.to_enum_sym] if args.first
    self[symbol]
  else
    super
  end
end

Instance Method Details

#default(k = nil) ⇒ Object 



25
26
27
 
# File 'lib/simple_enum/enum_hash.rb', line 25

def default(k = nil)
  @sym_value_lookup[k.to_enum_sym] if k
end