Singleton: Difference between revisions

From Multi Theft Auto: Wiki
Jump to navigation Jump to search
No edit summary
Line 38: Line 38:


'''Call class methods by newest instance'''
'''Call class methods by newest instance'''
==Code==
==Example==
<syntaxhighlight lang="lua">
<syntaxhighlight lang="lua">
-- DEFINE CLASS
-- DEFINE CLASS

Revision as of 01:56, 24 October 2016


This class allows you to restrict the instantiation of a specific class to one object.

Requirements

sbx320's classLib, can be found Here[1]

Code

Singleton = {}

function Singleton:getSingleton(...)
	if not self.ms_Instance then
		self.ms_Instance = self:new(...)
	end
	return self.ms_Instance
end

function Singleton:new(...)
	self.new = function() end
	local inst = new(self, ...)
	self.ms_Instance = inst
	return inst
end

function Singleton:isInstantiated()
	return self.ms_Instance ~= nil
end

function Singleton:virtual_destructor()
	for k, v in pairs(super(self)) do
		v.ms_Instance = nil
		v.new = Singleton.new
	end
end

Call class methods by newest instance

Example

-- DEFINE CLASS
TestClass = inherit(Singleton)

function TestClass:run()
   -- DO SOMETHING
end

TestClass:getSingleton():run()

See Also

  • Singleton » This class allows to restrict the instantiation of a specific class to one object.
  • CThread » This class represents a simple coroutine manager which can be used to limit method calls / loop.
  • Importer » This class make easy to use exported functions.
  • Observable » Observable variables. Call function on variable value change.
  • MatrixPOP » This class allows to use simple matrix without using MTA's OOP functions