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<?php |
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declare(strict_types = 1); |
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namespace Stratadox\Hydration\Hydrator; |
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use Stratadox\Hydration\Hydrates; |
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use Stratadox\Hydration\UnmappableInput; |
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/** |
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* Delegates hydration, selecting a hydrator based on an input value. |
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* |
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* @package Stratadox\Hydrate |
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* @author Stratadox |
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*/ |
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final class OneOfTheseHydrators implements Hydrates |
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{ |
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private $decisionKey; |
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private $hydratorMap; |
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private $current; |
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private function __construct(string $decisionKey, array $hydratorMap) |
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{ |
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$this->decisionKey = $decisionKey; |
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$this->hydratorMap = $hydratorMap; |
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foreach ($hydratorMap as $key => $instance) { |
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$this->mustBeAString($key); |
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$this->mustBeAHydrator($instance); |
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} |
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} |
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public static function decideBasedOnThe(string $key, array $map) : Hydrates |
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{ |
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return new OneOfTheseHydrators($key, $map); |
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} |
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/** |
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* @throws UnmappableInput |
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* @inheritdoc |
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*/ |
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public function fromArray(array $input) |
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{ |
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try { |
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$this->current = $this->hydratorBasedOn($this->keyFromThe($input)); |
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return $this->hydrateAnInstanceUsing($this->current, $input); |
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} finally { |
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$this->current = null; |
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} |
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} |
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public function currentInstance() |
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{ |
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if (!$this->current instanceof Hydrates) { |
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return null; |
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} |
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return $this->current->currentInstance(); |
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} |
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private function hydrateAnInstanceUsing(Hydrates $hydrator, array $input) |
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{ |
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return $hydrator->fromArray($input); |
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} |
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/** @throws UnmappableInput */ |
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private function hydratorBasedOn(string $key) : Hydrates |
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{ |
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if (!isset($this->hydratorMap[$key])) { |
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throw CannotDecideOnAHydrator::withThis($key); |
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} |
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return $this->hydratorMap[$key]; |
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} |
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/** @throws UnmappableInput */ |
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private function keyFromThe(array $input) : string |
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{ |
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if (!isset($input[$this->decisionKey])) { |
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throw CannotDecideOnAHydrator::without($this->decisionKey); |
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} |
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return $input[$this->decisionKey]; |
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} |
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private function mustBeAString(string $key) : void {} |
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private function mustBeAHydrator(Hydrates $instance) : void {} |
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} |
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Stratadox /
Hydrator
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This check looks for parameters that have been defined for a function or method, but which are not used in the method body.