Module: Collection::Generic

Defined in:
lib/collection/generic.rb

Instance Method Summary collapse

Instance Method Details

#[](type_parameter) ⇒ Object 



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

def [](type_parameter)
  type_parameter_name = constant_name(type_parameter)

  cls = nil
  unless self.const_defined?(type_parameter_name, false)
    cls = define_class(type_parameter)
    set_collection_constant(type_parameter, cls)
  else
    cls = const_get(type_parameter_name)
  end

  cls
end

#constant_name(constant) ⇒ Object 



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# File 'lib/collection/generic.rb', line 41

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

#define_class(type_parameter) ⇒ Object 



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# File 'lib/collection/generic.rb', line 17

def define_class(type_parameter)
  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

  set_collection_constant(type_parameter, cls)

  cls
end

#set_collection_constant(constant, cls) ⇒ Object 



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# File 'lib/collection/generic.rb', line 45

def set_collection_constant(constant, cls)
  class_name = constant_name(constant)

  unless self.const_defined?(class_name, false)
    self.const_set(class_name, cls)
  end

  class_name
end