<?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_Json

 * @subpackage Expr

 * @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: Expr.php 20096 2010-01-06 02:05:09Z bkarwin $

 */

/**

 * Class for Zend_Json encode method.

 *

 * This class simply holds a string with a native Javascript Expression,

 * so objects | arrays to be encoded with Zend_Json can contain native

 * Javascript Expressions.

 *

 * Example:

 * <code>

 * $foo = array(

 *     'integer'  =>9,

 *     'string'   =>'test string',

 *     'function' => Zend_Json_Expr(

 *         'function(){ window.alert("javascript function encoded by Zend_Json") }'

 *     ),

 * );

 *

 * Zend_Json::encode($foo, false, array('enableJsonExprFinder' => true));

 * // it will returns json encoded string:

 * // {"integer":9,"string":"test string","function":function(){window.alert("javascript function encoded by Zend_Json")}}

 * </code>

 *

 * @category   Zend

 * @package    Zend_Json

 * @subpackage Expr

 * @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_Json_Expr

{

    /**

     * Storage for javascript expression.

     *

     * @var string

     */

    protected $_expression;

    /**

     * Constructor

     *

     * @param  string $expression the expression to hold.

     * @return void

     */

    public function __construct($expression)

    {

        $this->_expression = (string) $expression;

    }

    /**

     * Cast to string

     *

     * @return string holded javascript expression.

     */

    public function __toString()

    {

        return $this->_expression;

    }

}