lithium\data\source\MongoDb::_init PHP Method

    protected function _init()
    {
        parent::_init();
        $this->_operators += array('like' => function ($key, $value) {
            return new MongoRegex($value);
        }, '$exists' => function ($key, $value) {
            return array('$exists' => (bool) $value);
        }, '$type' => function ($key, $value) {
            return array('$type' => (int) $value);
        }, '$mod' => function ($key, $value) {
            $value = (array) $value;
            return array('$mod' => array(current($value), next($value) ?: 0));
        }, '$size' => function ($key, $value) {
            return array('$size' => (int) $value);
        }, '$elemMatch' => function ($operator, $values, $options = array()) {
            $options += array('castOpts' => array(), 'field' => '');
            $options['castOpts'] += array('pathKey' => $options['field']);
            $values = (array) $values;
            if (empty($options['castOpts']['schema'])) {
                return array('$elemMatch' => $values);
            }
            foreach ($values as $key => &$value) {
                $value = $options['castOpts']['schema']->cast(null, $key, $value, $options['castOpts']);
            }
            return array('$elemMatch' => $values);
        });
    }