CommandManager.as

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import gugga.commands.CommandHistory;
import gugga.common.ICommand;
 
class gugga.commands.CommandManager extends  CommandHistory {
        
        private static var mInstance:CommandManager = undefined;
//      private var mHistory:CommandHistory;
        
        private function CommandManager()
        {
//                      mHistory = new CommandHistory();
        }
        
        public static function get Instance():CommandManager
        {
                if (mInstance == undefined)
                {
                        mInstance = new CommandManager();
                }
                return mInstance;
        }
        
        public function execute(aCmd:ICommand)
        {
                var clone:ICommand =  aCmd.clone();
                
                if(clone.execute())
                {
                        /* alternative 
                                aCmd.execute();
                                var clone:ICommand =  aCmd.clone();
                         */
                        add(clone);
                }
        }
        
}

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