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<?php
namespace Domain\Identity;
/**
* @author Sebastiaan Hilbers <[email protected]>
*/
abstract class StringIdentity implements Identity
{
* @var string
private $string;
public function __construct($string)
self::guardString($string);
$this->string = $string;
}
* Creates an identifier object from a string representation
*
* @param $string
* @return static
public static function fromString($string)
return new static($string);
* Returns a string that can be parsed by fromString()
* @return string
public function __toString()
return (string) $this->string;
* Compares the object to another IdentifiesAggregate object. Returns true if both have the same type and value.
* @param Identity $other
* @return boolean
public function equals(Identity $other)
return $other instanceof static && $this->string == $other->string;
* Make sure that the input is in fact a string
private static function guardString($string)
if (!is_string($string) || empty($string)) {
throw new \InvalidArgumentException("String expected");
bashilbers /
domain
