Command模式

原创于 2004-09-07 15:31:00 发布 · 1.8k 阅读

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#command #function #methods #class #action #c

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博客展示了Command模式的代码实现。定义了Command、Receiver、Invoker和ConcreteCommand类，通过创建实例并调用方法，最终执行了Receiver的Action方法，体现了Command模式的使用逻辑。

部署运行你感兴趣的模型镜像

class Command
{
        // Fields
        private var receiver: Receiver ;
        
        // Constructors
        private function Command( receiver:Receiver )
        {
                this.receiver = receiver;
        }
        
        // Methods
        public function Execute():Void{};
}

// "Receiver"
class Receiver
{
        // Methods
        public function Action():Void
        {
                trace("Called Receiver.Action()");
        }
}


// "Invoker"

class Invoker
{
        // Fields
        private var command:Command ;
        
        // Methods
        public function SetCommand( command:Command ):Void
        {
                this.command = command;
        }
        
        public function ExecuteCommand():Void
        {
                command.Execute();
        }
}



// "ConcreteCommand"
class ConcreteCommand extends Command
{
        // Constructors
        public function ConcreteCommand(receiver:Receiver)
        {
                super(receiver);
        }
        // Methods
        public function Execute():Void
        {
                receiver.Action();
        }
}

//client.fla
// Create receiver, command, and invoker
var r:Receiver = new Receiver();
var c:Command = new ConcreteCommand(r);
var i:Invoker = new Invoker();
// Set and execute command
i.SetCommand(c);
i.ExecuteCommand();

//Called Receiver.Action()