PHP Collection 类

<?php

/**

 * PHP collection 类(一) 

 */

error_reporting(0);

class Collection{

   

    protected $_members = array();

    public function addItem($obj,$key = null){

        if(empty($key)) throw new Exception("The key is not given!");

        if(isset($this->_members[$key])) throw new Exception("The key is exists");

        $this->_members[$key] = $obj;

    }

    public function removeItem($key){

        if(!isset($this->_members[$key])) throw new Exception("Invalid key");

        unset($this->_members[$key]);

    }

    public function getItem($key){

        if(!isset($this->_members[$key])) throw new Exception("Invalid key");

        return $this->_members[$key];

    }

    public function getLength(){

        return sizeof($this->_members);

    }

    public function keys(){

       return array_keys($this->_members);

    }

}

class person{

    private $_name;

    private $_number;

    public function __construct($name,$number){

       $this->_name = $name;

       $this->_number = $number;

    }

    public function __toString(){

       return $this->_name.' is '.$this->_number;

    }

}

$testC = new superCollection();

$testC->spaddItem(new person('xiaojiang',25),'xiaojiang');

$testC->spaddItem(new person('xiaoxin',25),'xiaoxin');

//$testC->removeItem('xiaojiang');

//print_r($testC);

/*try{

    // var_dump($testC);

    //echo $testC->spgetItem('xiaojiang');

}catch(Exception $e){

   echo $e->getmessage();

} */



class superCollection extends Collection{

    

    private $_isLoaded = false;

    private $_onLoad;



    public function __call($method,$param){

        if(substr($method,0,2) == 'sp' && is_callable( array(parent,substr($method,2)) ) ){

            $this->_checkCallback();

            return call_user_func_array(array(parent,substr($method,2)),$param);

        }

    }

    public function _checkCallback(){

        if(!$_isLoaded && isset($this->_onLoad)){

            $this->isLoaded = true;

            call_user_func($this->_onLoad,$this);

        }

    }



    public function setCallback($funName,$Obj = null,$param){

        if($Obj){

           $callback = array($Obj,$funName);

        }else{

           $callback = $funName;

        }

        if(!is_callable($callback,false,$callbackName)){

            throw new Exception("{$callbackName} can't be called");

            return false;

        }

        $this->_onLoad = $callback;

    }

}



class course_collection extends superCollection{}

class course{

    private $_name;

    private $_course_code;

    private $_id;

    function __construct($name,$code,$id){

       $this->_name = $name;

       $this->_course_code = $code;

       $this->_id = $id;

    }

    public function getId(){

        return $this->_id;

    }

}

class student{

    private $_name;

    private $_age;

    

    public function __construct($name,$age){

       $this->_name = $name;

       $this->_age = $age;

       $this->_course = new course_collection();

       $this->_course->setCallback('getCourse',$this);

    }

    public function getCourse($courseObj){

        

      $date = array(

                        'xiaojiang'=> array(

                                              array('id'=>1,'name'=>'math','code'=>99),

                                              array('id'=>2,'name'=>'english','code'=>88)

                                            ),

                        'xiaoxin'=> array(

                                              array('id'=>3,'name'=>'math','code'=>77),

                                              array('id'=>4,'name'=>'english','code'=>66)

                                           )

                     );

        foreach($date[$this->_name] as $k => $v){

            $course = new course($v['name'],$v['code'],$v['id']);

            $courseObj->addItem($course,$course->getId());

        }

    }



    public function getName(){

       return $this->_name;

    }

    

}

try{

   $Stud = new student('xiaojiang',25);

   //echo $Stud->getName();

   print_r($Stud->_course->spgetItem(2));

}catch(Exception $e){

   echo $e->getmessage();

}

?>