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<?php |
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namespace Zerg\Field; |
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use Zerg\Stream\AbstractStream; |
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/** |
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* Enum field return one of given values depends on read value. |
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* |
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* @since 0.1 |
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* @package Zerg\Field |
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*/ |
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class Enum extends Int |
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{ |
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/** |
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* @var array Array of possible values. Keys should by integer. |
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*/ |
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protected $values; |
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/** |
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* @var mixed Default value, if no one of possible values are not relate to read value. |
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*/ |
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protected $default; |
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public function __construct($size, array $values = [], $options = []) |
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{ |
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parent::__construct($size, $options); |
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if (!empty($values)) { |
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$this->setValues($values); |
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} |
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} |
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/** |
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* Read key from Stream, and return value by this key or default value. |
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* |
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* @param AbstractStream $stream Stream from which resolved field reads. |
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* @return object|integer|double|string|array|boolean|callable Value by read key or default value if present. |
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* @throws InvalidKeyException If read key is not exist and default value is not presented. |
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*/ |
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public function read(AbstractStream $stream) |
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{ |
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$key = parent::read($stream); |
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$values = $this->getValues(); |
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if (array_key_exists($key, $values)) { |
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$value = $values[$key]; |
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} else { |
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$value = $this->getDefault(); |
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} |
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if ($value === null) { |
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throw new InvalidKeyException( |
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"Value '{$key}' does not correspond to a valid enum key. Presented keys: '" . |
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implode("', '", array_keys($values)) . "'" |
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); |
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} |
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return $value; |
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} |
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/** |
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* @return array |
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*/ |
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public function getValues() |
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{ |
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return $this->values; |
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} |
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/** |
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* @param array $values |
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*/ |
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public function setValues($values) |
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{ |
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$this->values = $values; |
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} |
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/** |
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* @return mixed |
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*/ |
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public function getDefault() |
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{ |
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return $this->default; |
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} |
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/** |
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* @param mixed $default |
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*/ |
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public function setDefault($default) |
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{ |
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$this->default = $default; |
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} |
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} |
klermonte /
zerg
