<?php

/**
 * Database result implementation for Mysqli
 */
class Result_Mysql_Driver extends Result_Database {

    /**
     * Initializes new result object
     * 
     * @param mysqli_result $result Mysqli Result
     * @return void    
     * @access public  
	 * @link http://php.net/manual/en/class.mysqli-result.php
     */
	public function __construct($result) {
		$this->_result = $result;
		$this->_row=$this->_result->fetch_object();
	}

    /**
     * Throws exception if rewind is attempted.
     * 
     * @return void      
     * @access public    
     * @throws Exception If rewind is attempted
     */
    public function rewind() {
		if($this->_position!=0)
			throw new Exception('Mysqli result cannot be rewound for unbuffered queries.');
    }
		
    /**
     * Iterates to the next row in the result set
     * 
     * @return void   
     * @access public 
     */
    public function next() {

        $this->_position++;
		$this->_row=$this->_result->fetch_object();
		if ($this->_row == null)
				$this->_result->free();
    }
    	
}