<?php

/**

 * Zend Framework

 *

 * LICENSE

 *

 * This source file is subject to the new BSD license that is bundled

 * with this package in the file LICENSE.txt.

 * It is also available through the world-wide-web at this URL:

 * http://framework.zend.com/license/new-bsd

 * If you did not receive a copy of the license and are unable to

 * obtain it through the world-wide-web, please send an email

 * to license@zend.com so we can send you a copy immediately.

 *

 * @category   Zend

 * @package    Zend_Serializer

 * @subpackage Adapter

 * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)

 * @license    http://framework.zend.com/license/new-bsd     New BSD License

 * @version    $Id: Json.php 20574 2010-01-24 17:39:14Z mabe $

 */

/** @see Zend_Serializer_Adapter_AdapterAbstract */

require_once 'Zend/Serializer/Adapter/AdapterAbstract.php';

/** @see Zend_Json */

require_once 'Zend/Json.php';

/**

 * @category   Zend

 * @package    Zend_Serializer

 * @subpackage Adapter

 * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)

 * @license    http://framework.zend.com/license/new-bsd     New BSD License

 */

class Zend_Serializer_Adapter_Json extends Zend_Serializer_Adapter_AdapterAbstract

{

    /**

     * @var array Default options

     */

    protected $_options = array(

        'cycleCheck'           => false,

        'enableJsonExprFinder' => false,

        'objectDecodeType'     => Zend_Json::TYPE_ARRAY,

    );

    /**

     * Serialize PHP value to JSON

     * 

     * @param  mixed $value 

     * @param  array $opts 

     * @return string

     * @throws Zend_Serializer_Exception on JSON encoding exception

     */

    public function serialize($value, array $opts = array())

    {

        $opts = $opts + $this->_options;

        try  {

            return Zend_Json::encode($value, $opts['cycleCheck'], $opts);

        } catch (Exception $e) {

            require_once 'Zend/Serializer/Exception.php';

            throw new Zend_Serializer_Exception('Serialization failed', 0, $e);

        }

    }

    /**

     * Deserialize JSON to PHP value

     * 

     * @param  string $json 

     * @param  array $opts 

     * @return mixed

     */

    public function unserialize($json, array $opts = array())

    {

        $opts = $opts + $this->_options;

        try {

            $ret = Zend_Json::decode($json, $opts['objectDecodeType']);

        } catch (Exception $e) {

            require_once 'Zend/Serializer/Exception.php';

            throw new Zend_Serializer_Exception('Unserialization failed by previous error', 0, $e);

        }

        // json_decode returns null for invalid JSON

        if ($ret === null && $json !== 'null') {

            require_once 'Zend/Serializer/Exception.php';

            throw new Zend_Serializer_Exception('Invalid json data');

        }

        return $ret;

    }

}