Module: Collection::Generic

Defined in:
lib/collection/generic.rb

Instance Method Summary collapse

Instance Method Details

#[](type_parameter, &implementation) ⇒ Object 



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# File 'lib/collection/generic.rb', line 3

def [](type_parameter, &implementation)
  type_parameter_name = constant_name(type_parameter)

  if implementation.nil? && self.const_defined?(type_parameter_name, false)
    return const_get(type_parameter_name)
  else
    return define_class(type_parameter, &implementation)
  end
end

#constant_name(constant) ⇒ Object 



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# File 'lib/collection/generic.rb', line 57

def constant_name(constant)
  constant.name.gsub('::', '_')
end

#define_class(type_parameter, &implementation) ⇒ Object 



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# File 'lib/collection/generic.rb', line 13

def define_class(type_parameter, &implementation)
  cls = Class.new(self) do
    def self.build(items)
      instance = new

      items.each do |member|
        instance.add(member)
      end

      instance
    end

    def initialize; end

    define_method :type_parameter do
      type_parameter
    end
  end

  if not implementation.nil?
    cls.class_exec(&implementation)
  end

  randomize = !implementation.nil?
  set_collection_constant(type_parameter, cls, randomize)

  cls
end

#set_collection_constant(constant, cls, randomize = nil) ⇒ Object 



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# File 'lib/collection/generic.rb', line 42

def set_collection_constant(constant, cls, randomize=nil)
  randomize ||= false

  constant_name = constant_name(constant)

  if randomize
    suffix = SecureRandom.hex.upcase
    constant_name = "#{constant_name}_#{suffix}"
  end

  self.const_set(constant_name, cls)

  constant_name
end