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<?php
/* --------------------------------------------------------------
   CustomerCountryIso3.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('CustomerCountryIso3Interface');
require_once __DIR__ . '/../../../../Shared/Utility/StringUtilityTrait.inc.php';

/**
 * Value Object
 *
 * Class CustomerCountryIso3
 *
 * Represents a customer country ISO3 code
 *
 * @category   System
 * @package    Customer
 * @subpackage ValueObjects
 * @implements CustomerCountryIso3Interface
 */
class CustomerCountryIso3 implements CustomerCountryIso3Interface
{
    use StringUtilityTrait;
    
    /**
     * Customer's ISO-3 country code.
     * @var string
     */
    protected $iso3;


    /**
     * Constructor of the class CustomerCountryIso3.
     *
     * Validates the length and data type of the customer country ISO-3 code.
     *
     * @param string $p_iso3 Customer's ISO-3 country code.
     *
     * @throws InvalidArgumentException If $p_iso3 is not a string.
     * @throws LengthException If $p_iso3 contains more characters than 3.
     */
    public function __construct($p_iso3)
    {
        if(!is_string($p_iso3))
        {
            throw new InvalidArgumentException('$p_iso3 is not a string');
        }

        $dbFieldLengthIso3 = 3;
        $iso3              = trim($p_iso3);

        if($this->strlenWrapper($iso3) > $dbFieldLengthIso3)
        {
            throw new LengthException('$iso3 is longer than ' . $dbFieldLengthIso3 . ' characters CHAR(3)');
        }

        $this->iso3 = $iso3;
    }


    /**
     * Returns the equivalent string value.
     * @return string Equivalent string value.
     */
    public function __toString()
    {
        return $this->iso3;
    }
}