PHP面向切面编程组件(3)

     */
    public static function autoload() {
        foreach(self::$_classes as $v){
            require_once dirname(__FILE__) . $v;
        }
    }
   
    /**
     * 必须先调用此方法来实例化扩展族,才能调用addExtension\removeExtension等
     * @return ExtensionFamily
     */
    public static function createExtension(){
        self::$extFamily = new ExtensionFamily();
        return self::$extFamily;
    }
   
    public static function removeExtension($extName){
        if(is_null(self::$extFamily)){
            throw new Exception("Please createExtension first");
            return false;
        }else{
            unset(self::$extFamily->_extensionArray[$extName]);
        }
    }
   
    public static function addExtension($extName, Extension $ext){
        if(is_null(self::$extFamily)){
            throw new Exception("Please createExtension first");
            return false;
        }else{
            self::$extFamily->_extensionArray[$extName] = $ext;
        }
    }
   
    public static function removeAllExtension(){
        if(is_null(self::$extFamily)){
            throw new Exception("Please createExtension first");
            return false;
        }else{
            foreach(self::$extFamily->_extensionArray as $extName=>$ext){
                unset(self::$extFamily->_extensionArray[$extName]);
            }