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<?php
/* --------------------------------------------------------------
   CustomerCallNumber.inc.php 2015-01-30 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('CustomerCallNumberInterface');
require_once __DIR__ . '/../../../../Shared/Utility/StringUtilityTrait.inc.php';

/**
 * Value Object
 *
 * Class CustomerCallNumber
 *
 * Represents a phone or fax number
 *
 * @category    System
 * @package     Customer
 * @subpackage  ValueObjects
 * @implements  CustomerCallNumberInterface
 */
class CustomerCallNumber implements CustomerCallNumberInterface
{
    use StringUtilityTrait;
    
    /**
     * Customer's call number.
     * @var string
     */
    protected $callNumber;


    /**
     * Constructor of the class CustomerCallNumber.
     *
     * Validates the length and data type of the customer call number.
     *
     * @param string $p_callNumber Customer's call number.
     *
     * @throws InvalidArgumentException If $p_callNumber is not a string
     * @throws LengthException If $p_callNumber contains more characters than 32.
     */
    public function __construct($p_callNumber)
    {
        if(!is_string($p_callNumber))
        {
            throw new InvalidArgumentException('$p_callNumber is not a string');
        }

        $dbFieldLength = 32;
        $callNumber    = trim($p_callNumber);

        if($this->strlenWrapper($callNumber) > $dbFieldLength)
        {
            throw new LengthException('$callNumber is longer than ' . $dbFieldLength . ' characters VARCHAR(32)');
        }
        
        $this->callNumber = $callNumber;
    }


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