GpsLab\Component\Enum\ExplicitEnum

Complexity

Total Complexity

14

Size/Duplication

Total Lines	105
Duplicated Lines	0 %

Coupling/Cohesion

Components	2
Dependencies	2

Test Coverage

Coverage

100%

Importance

Changes

0

9 Methods

Rating	Name	Duplication	Size	Complexity
A	__construct()	0	4	1
A	byValue()	0	15	3
A	value()	0	4	1
A	values()	0	9	2
A	equals()	0	4	3
A	__toString()	0	4	1
A	__clone()	0	4	1
A	serialize()	0	4	1
A	unserialize()	0	4	1

<?php

/**
 * GpsLab component.
 *
 * @author    Peter Gribanov <info@peter-gribanov.ru>
 * @copyright Copyright (c) 2017, Peter Gribanov
 * @license   http://opensource.org/licenses/MIT
 */

namespace GpsLab\Component\Enum;

use GpsLab\Component\Enum\Exception\OutOfEnumException;

abstract class ExplicitEnum implements Enum, \Serializable
{
    /**
     * @var mixed
     */
    private $value;

    /**
     * @var self[]
     */
    private static $instances = [];

    /**
     * @param mixed $value
     */
    final private function __construct($value)
    {
        $this->value = $value;
    }

    /**
     * @param mixed $value
     *
     * @return self
     */
    final public static function byValue($value)
    {
        $key = get_called_class().'|'.$value;

        // limitation of count object instances
        if (!isset(self::$instances[$key])) {
            if (!array_key_exists($value, static::choices())) {
                throw OutOfEnumException::invalidValue($value, get_called_class());
            }

            self::$instances[$key] = new static($value);
        }

        return self::$instances[$key];
    }

    /**
     * @return mixed
     */
    final public function value()
    {
        return $this->value;
    }

    /**
     * Available values.
     *
     * @return self[]
     */
    final public static function values()
    {
        $values = [];
        foreach (static::choices() as $value => $label) {
            $values[$label] = self::byValue($value);
        }

        return $values;
    }

    /**
     * @param Enum $enum
     *
     * @return bool
     */
    final public function equals(Enum $enum)
    {
        return $this === $enum || ($this->value() === $enum->value() && get_called_class() === get_class($enum));
    }

    /**
     * Return readable value.
     *
     * @return string
     */
    public function __toString()
    {
        return static::choices()[$this->value()];
    }

    final public function __clone()
    {
        throw new \LogicException('Enumerations are not cloneable');
    }

    /**
     * @return mixed
     */
    public function serialize()
    {
        return serialize($this->value);
    }

    /**
     * @param mixed $data
     */
    public function unserialize($data)
    {
        static::byValue($this->value = unserialize($data));
    }
}