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<?php
/* --------------------------------------------------------------
   CustomerCountryIso2.php 2015-02-02 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]
   --------------------------------------------------------------
*/

MainFactory::load_class('CustomerCountryIso2Interface');
require_once __DIR__ . '/../../../../Shared/Utility/StringUtilityTrait.inc.php';

/**
 * Value Object
 *
 * Class CustomerCountryIso2
 *
 * Represents a customer country ISO2 code
 *
 * @category   System
 * @package    Customer
 * @subpackage ValueObjects
 * @implements CustomerCountryIso2Interface
 */
class CustomerCountryIso2 implements CustomerCountryIso2Interface
{
    use StringUtilityTrait;
    
    /**
     * Customer's ISO-2 country code.
     * @var string
     */
    protected $iso2;
    

    /**
     * Constructor of the class CustomerCountryIso2.
     *
     * Validates the length and data type of the customer country ISO-2 code.
     *
     * @param string $p_iso2 Customer's ISO-2 country code.
     *
     * @throws InvalidArgumentException If $p_iso2 is not a string.
     * @throws LengthException If $p_iso2 contains more characters than 2.
     */
    public function __construct($p_iso2)
    {
        if(!is_string($p_iso2))
        {
            throw new InvalidArgumentException('$p_iso2 is not a string');
        }

        $dbFieldLengthIso2 = 2;
        $iso2              = trim($p_iso2);

        if($this->strlenWrapper($iso2) > $dbFieldLengthIso2)
        {
            throw new LengthException('$iso2 is longer than ' . $dbFieldLengthIso2 . ' characters CHAR(2)');
        }

        $this->iso2 = $iso2;
    }


    /**
     * Returns the equivalent string value.
     * @return string Equivalent string value.
     */
    public function __toString()
    {
        return $this->iso2;
    }
}