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<?php
/* --------------------------------------------------------------
   AddressClass.inc.php 2015-01-29 gm
   Gambio GmbH
   http://www.gambio.de
   Copyright (c) 2015 Gambio GmbH
   Released under the GNU General Public License (Version 2)
   [http://www.gnu.org/licenses/gpl-2.0.html]
   --------------------------------------------------------------
*/

/**
 * Value Object
 *
 * Class AddressClass
 *
 * Represents a customer address
 *
 * @category   System
 * @package    Customer
 * @subpackage ValueObjects
 * @implements AddressClassInterface
 */
class AddressClass implements AddressClassInterface
{
    /**
     * Address class.
     * @var string
     */
    protected $addressClass;


    /**
     * Constructor of the class AddressClass.
     *
     * Validates the data type of the address class.
     *
     * @param string $addressClass Address class.
     *
     * @throws InvalidArgumentException If $p_city is not a string.
     */
    public function __construct($addressClass)
    {
        if(!is_string($addressClass))
        {
            throw new InvalidArgumentException('$addressClass is not a string');
        }

        $this->addressClass = $addressClass;
    }


    /**
     * Returns the equivalent string value.
     * @return string Equivalent string value.
     */
    public function __toString()
    {
        return $this->addressClass;
    }
}