protected function process($address) {
        global $DB;

        if (!self::is_correct_format($address)) {
            // This address does not contain a subaddress to parse.
            return;
        }

        // Ensure that the instance record is empty.
        $this->record = null;

        $record = new \stdClass();
        $record->address = $address;

        list($localpart) = explode('@', $address, 2);
        list($record->mailbox, $encodeddata) = explode('+', $localpart, 2);
        $data = base64_decode($encodeddata, true);
        if (!$data) {
            // This address has no valid data.
            return;
        }

        $content = @unpack('N2handlerid/N2userid/N2datavalue/H*datakey', $data);

        if (!$content) {
            // This address has no data.
            return;
        }

        if (PHP_INT_SIZE === 8) {
            // 64-bit machine.
            $content['handlerid'] = $content['handlerid1'] << 32 | $content['handlerid2'];
            $content['userid']    = $content['userid1'] << 32    | $content['userid2'];
            $content['datavalue'] = $content['datavalue1'] << 32 | $content['datavalue2'];
        } else {
            if ($content['handlerid1'] > 0 || $content['userid1'] > 0 || $content['datavalue1'] > 0) {
                // Any 64-bit integer which is greater than the 32-bit integer size will have a non-zero value in the first
                // half of the integer.
                throw new \moodle_exception('Mixed environment.' .
                    ' Key generated with a 64-bit machine but received into a 32-bit machine.');
            }
            $content['handlerid'] = $content['handlerid2'];
            $content['userid']    = $content['userid2'];
            $content['datavalue'] = $content['datavalue2'];
        }

        // Clear the 32-bit to 64-bit variables away.
        unset($content['handlerid1']);
        unset($content['handlerid2']);
        unset($content['userid1']);
        unset($content['userid2']);
        unset($content['datavalue1']);
        unset($content['datavalue2']);

        $record = (object) array_merge((array) $record, $content);

        // Fetch the user record.
        $record->user = $DB->get_record('user', array('id' => $record->userid));

        // Fetch and set the handler.
        if ($handler = manager::get_handler_from_id($record->handlerid)) {
            $this->handler = $handler;

            // Retrieve the record for the data key.
            $record->data = $DB->get_record('messageinbound_datakeys',
                    array('handler' => $handler->id, 'datavalue' => $record->datavalue));
        }

        $this->record = $record;
    }