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<?php
namespace StraTDeS\VO\Single;
abstract class Enum
{
protected $value;
private function __construct($value)
$this->checkValueIsValid($value);
$this->value = $value;
}
/**
* @param $value
* @return static
*/
public static function fromValue($value)
return new static($value);
* Returns value.
*
* Override this method to strict type your Enum.
* @return mixed
public function value()
return $this->value;
public abstract function allowedValues(): array;
* Checks whether the value is valid for this Enum.
* Override this method to add other validations.
protected function checkValueIsValid($value): void
if (!in_array($value, $this->allowedValues())) {
throw new \InvalidArgumentException($this->valueNotValidMessage($value));
* Generates the error message.
* Override this method if the validation is ok but you want a different message.
* @return string
protected function valueNotValidMessage($value): string
return "$value is not a valid value for this Enum";
public function equal(Enum $enum): bool
return $this->value == $enum->value;
stratdes /
vo
