|
|
/**
* 命令模式
*
* 將一個請求封裝為一個對象從而使你可用不同的請求對客戶進(jìn)行參數(shù)化,對請求排除或記錄請求日志,以及支持可取消的操作
*/
interface Command
{
public function execute();
}
class Invoker
{
private $_command = array();
public function setCommand($command) {
$this->_command[] = $command;
}
public function executeCommand()
{
foreach($this->_command as $command)
{
$command->execute();
}
}
public function removeCommand($command)
{
$key = array_search($command, $this->_command);
if($key !== false)
{
unset($this->_command[$key]);
}
}
}
class Receiver
{
private $_name = null;
public function __construct($name) {
$this->_name = $name;
}
public function action()
{
echo $this->_name." action<br/>";
}
public function action1()
{
echo $this->_name." action1<br/>";
}
}
class ConcreteCommand implements Command
{
private $_receiver;
public function __construct($receiver)
{
$this->_receiver = $receiver;
}
public function execute()
{
$this->_receiver->action();
}
}
class ConcreteCommand1 implements Command
{
private $_receiver;
public function __construct($receiver)
{
$this->_receiver = $receiver;
}
public function execute()
{
$this->_receiver->action1();
}
}
class ConcreteCommand2 implements Command
{
private $_receiver;
public function __construct($receiver)
{
$this->_receiver = $receiver;
}
public function execute()
{
$this->_receiver->action();
$this->_receiver->action1();
}
}
$objRecevier = new Receiver("No.1");
$objRecevier1 = new Receiver("No.2");
$objRecevier2 = new Receiver("No.3");
$objCommand = new ConcreteCommand($objRecevier);
$objCommand1 = new ConcreteCommand1($objRecevier);
$objCommand2 = new ConcreteCommand($objRecevier1);
$objCommand3 = new ConcreteCommand1($objRecevier1);
$objCommand4 = new ConcreteCommand2($objRecevier2); // 使用 Recevier的兩個方法
$objInvoker = new Invoker();
$objInvoker->setCommand($objCommand);
$objInvoker->setCommand($objCommand1);
$objInvoker->executeCommand();
$objInvoker->removeCommand($objCommand1);
$objInvoker->executeCommand();
$objInvoker->setCommand($objCommand2);
$objInvoker->setCommand($objCommand3);
$objInvoker->setCommand($objCommand4);
$objInvoker->executeCommand();
[/code]
php技術(shù)：php設(shè)計(jì)模式 Command(命令模式)，轉(zhuǎn)載需保留來源！
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