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<?php |
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declare(strict_types=1); |
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namespace Stratadox\TableLoader\Loader; |
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use Stratadox\Hydrator\Hydrates; |
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use Stratadox\IdentityMap\IdentityMap; |
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use Stratadox\IdentityMap\MapsObjectsByIdentity as Map; |
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use Stratadox\TableLoader\Loader\ContainsResultingObjects as Objects; |
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use Throwable; |
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/** |
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* Converts a table into objects. |
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* |
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* @author Stratadox |
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*/ |
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final class SimpleTable implements LoadsTables |
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{ |
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private $label; |
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private $make; |
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private $identity; |
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private function __construct( |
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string $label, |
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Hydrates $hydrator, |
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IdentifiesEntities $identity |
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) { |
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$this->label = $label; |
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$this->make = $hydrator; |
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$this->identity = $identity; |
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} |
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/** |
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* Makes a new simple table converter. |
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* |
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* @param string $label The label to apply. |
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* @param Hydrates $hydrator The hydrator to produces the objects. |
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* @param IdentifiesEntities $identity The row identification mechanism. |
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* @return LoadsTables The simple table converter. |
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*/ |
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public static function converter( |
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string $label, |
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Hydrates $hydrator, |
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IdentifiesEntities $identity |
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): LoadsTables { |
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return new self($label, $hydrator, $identity); |
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} |
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/** @inheritdoc */ |
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public function from(array $input, Map $map = null): Objects |
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{ |
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$result = Result::fromArray([], $map ?: IdentityMap::startEmpty()); |
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foreach ($input as $row) { |
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try { |
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$result = $this->loadInto($result, $row); |
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} catch (Throwable $exception) { |
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throw UnmappableRow::encountered($exception, $this->label, $row); |
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} |
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} |
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return $result; |
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} |
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/** @throws Throwable */ |
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private function loadInto(Objects $result, array $row): Objects |
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{ |
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$class = $this->make->classFor($row); |
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$id = $this->identity->forIdentityMap($row); |
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if ($result->has($class, $id)) { |
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return $result->include($this->label, $id, $result->get($class, $id)); |
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} |
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return $result->add( |
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$this->label, |
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$this->identity->forLoading($row), |
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$id, |
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$this->make->fromArray($row) |
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); |
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} |
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} |
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Stratadox /
TableLoader
Let?s assume that you have a directory layout like this:
. |-- OtherDir | |-- Bar.php | `-- Foo.php `-- SomeDir `-- Foo.phpand let?s assume the following content of
Bar.php:If both files
OtherDir/Foo.phpandSomeDir/Foo.phpare loaded in the same runtime, you will see a PHP error such as the following:PHP Fatal error: Cannot use SomeDir\Foo as Foo because the name is already in use in OtherDir/Foo.phpHowever, as
OtherDir/Foo.phpdoes not necessarily have to be loaded and the error is only triggered if it is loaded beforeOtherDir/Bar.php, this problem might go unnoticed for a while. In order to prevent this error from surfacing, you must import the namespace with a different alias: