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Posted By

jasonm23 on 11/24/09


Tagged

flash Singleton Flex as3 DesignPatterns


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AS3 Enforced Singleton

 / Published in: ActionScript 3
 

This implementation of the singleton pattern provides a way to enforce singleton usage. There are numerous Singleton implementations for AS3 (due to the lack of private constructor) this method, is the cleanest I've seen so far.

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  1. package mypackage
  2. {
  3. 	public class SingletonExample
  4. 	{
  5. 		public function SingletonExample(enforcer:SingletonEnforcer)
  6. 		{
  7. 		}
  8.  
  9. 		private static var _instance : SingletonExample;
  10.  
  11. 		public static function getInstance():SingletonExample
  12. 		{
  13. 			if (_instance == null)
  14. 				_instance = new SingletonExample(new SingletonEnforcer());
  15.  
  16. 			return _instance;
  17. 		}
  18. 	}
  19. }
  20. class SingletonEnforcer {}

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