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<?php
/**
* BaconQrCode
*
* @link http://github.com/Bacon/BaconQrCode For the canonical source repository
* @copyright 2013 Ben 'DASPRiD' Scholzen
* @license http://opensource.org/licenses/BSD-2-Clause Simplified BSD License
*/
namespace BaconQrCode\Common;
use BaconQrCode\Exception;
use ReflectionClass;
/**
* A general enum implementation until we got SplEnum.
*/
abstract class AbstractEnum
{
/**
* Default value.
*/
const __default = null;
/**
* Current value.
*
* @var mixed
*/
protected $value;
/**
* Cache of constants.
*
* @var array
*/
protected $constants;
/**
* Whether to handle values strict or not.
*
* @var boolean
*/
protected $strict;
/**
* Creates a new enum.
*
* @param mixed $initialValue
* @param boolean $strict
*/
public function __construct($initialValue = null, $strict = false)
{
$this->strict = $strict;
$this->change($initialValue);
}
/**
* Changes the value of the enum.
*
* @param mixed $value
* @return void
*/
public function change($value)
{
if (!in_array($value, $this->getConstList(), $this->strict)) {
throw new Exception\UnexpectedValueException('Value not a const in enum ' . get_class($this));
}
$this->value = $value;
}
/**
* Gets current value.
*
* @return mixed
*/
public function get()
{
return $this->value;
}
/**
* Gets all constants (possible values) as an array.
*
* @param boolean $includeDefault
* @return array
*/
public function getConstList($includeDefault = true)
{
if ($this->constants === null) {
$reflection = new ReflectionClass($this);
$this->constants = $reflection->getConstants();
}
if ($includeDefault) {
return $this->constants;
}
$constants = $this->constants;
unset($constants['__default']);
return $constants;
}
/**
* Gets the name of the enum.
*
* @return string
*/
public function __toString()
{
return array_search($this->value, $this->getConstList());
}
}
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