Lua class code

class.lua

Class = {}

function Class:new(super)
  local class = {}

  if super ~= nil then
    local class_mt = {__index = super}
    setmetatable(class, super)
  end

  local object_mt = {__index = class}

  class.new = function(self, ...)
    local object = {}
    setmetatable(object, object_mt)
    if object.initialize then
      object:initialize(...)
    end
    return object
  end

  return class
end