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<?php |
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namespace MabeEnum; |
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use RuntimeException; |
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use LogicException; |
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/** |
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* Trait to make enumerations serializable |
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* |
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* This trait is a workaround to make enumerations serializable. |
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* |
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* Please note that this feature breaks singleton behaviour of your enumerations |
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* if an enumeration will be unserialized after it was instantiated already. |
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* |
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* @link https://github.com/marc-mabe/php-enum/issues/52 for further information about this feature |
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* @link http://github.com/marc-mabe/php-enum for the canonical source repository |
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* @copyright Copyright (c) 2015 Marc Bennewitz |
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* @license http://github.com/marc-mabe/php-enum/blob/master/LICENSE.txt New BSD License |
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*/ |
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trait EnumSerializableTrait |
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{ |
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/** |
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* The method will be defined by MabeEnum\Enum |
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* @return null|bool|int|float|string |
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*/ |
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abstract public function getValue(); |
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/** |
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* Serialized the value of the enumeration |
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* This will be called automatically on `serialize()` if the enumeration implements the `Serializable` interface |
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* @return string |
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*/ |
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public function serialize() |
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{ |
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return serialize($this->getValue()); |
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} |
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/** |
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* Unserializes a given serialized value and push it into the current instance |
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* This will be called automatically on `unserialize()` if the enumeration implements the `Serializable` interface |
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* @param string $serialized |
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* @throws RuntimeException On an unknown or invalid value |
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* @throws LogicException On changing numeration value by calling this directly |
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*/ |
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public function unserialize($serialized) |
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{ |
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$value = unserialize($serialized); |
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$constants = self::getConstants(); |
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$name = array_search($value, $constants, true); |
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View Code Duplication |
if ($name === false) { |
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$message = is_scalar($value) |
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? 'Unknown value ' . var_export($value, true) |
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: 'Invalid value of type ' . (is_object($value) ? get_class($value) : gettype($value)); |
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throw new RuntimeException($message); |
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} |
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$class = get_class($this); |
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$enumerator = $this; |
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$closure = function () use ($class, $name, $value, $enumerator) { |
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if ($this->value !== null && $value !== null) { |
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throw new LogicException('Do not call this directly - please use unserialize($enum) instead'); |
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} |
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$this->value = $value; |
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if (!isset(self::$instances[$class][$name])) { |
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self::$instances[$class][$name] = $enumerator; |
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} |
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}; |
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$closure = $closure->bindTo($this, 'MabeEnum\Enum'); |
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$closure(); |
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} |
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} |
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marc-mabe /
php-enum
