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<?php |
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declare(strict_types=1); |
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namespace Stratadox\TableLoader; |
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use function is_null; |
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/** |
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* Locates the source object for the relationship. |
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* |
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* @author Stratadox |
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*/ |
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final class From implements KnowsWhereToLookFrom |
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{ |
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private $who; |
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private $identity; |
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private $class; |
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private function __construct(string $who, IdentifiesEntities $identity, ?string $class) |
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{ |
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$this->who = $who; |
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$this->identity = $identity; |
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$this->class = $class; |
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} |
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/** |
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* Makes a new source locator. |
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* |
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* @param string $label The label of the source objects. |
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* @param IdentifiesEntities $identity The mechanism to identify the source |
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* entity of the row. |
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* @return KnowsWhereToLookFrom The source locator. |
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*/ |
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public static function the( |
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string $label, |
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IdentifiesEntities $identity |
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): KnowsWhereToLookFrom { |
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return new self($label, $identity, null); |
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} |
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/** |
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* Makes a new source locator for a concrete class. |
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* |
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* @param string $class The name of the concrete class. |
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* @param string $label The label of the source objects. |
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* @param IdentifiesEntities $identity The mechanism to identify the source |
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* entity of the row. |
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* @return KnowsWhereToLookFrom The source locator. |
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*/ |
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public static function onlyThe( |
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string $class, |
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string $label, |
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IdentifiesEntities $identity |
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): KnowsWhereToLookFrom { |
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return new self($label, $identity, $class); |
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} |
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/** @inheritdoc */ |
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public function label(): string |
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{ |
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return $this->who; |
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} |
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/** @inheritdoc */ |
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public function this(array $relationship): string |
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{ |
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return $this->identity->forLoading($relationship); |
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} |
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/** @inheritdoc */ |
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public function hereToo(object $shouldWeConnectIt): bool |
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{ |
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return is_null($this->class) || $shouldWeConnectIt instanceof $this->class; |
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} |
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} |
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Stratadox /
TableLoader
