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<?php |
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/** |
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* This file is part of the Stack package. |
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* |
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* (c) Andrzej Kostrzewa <[email protected]> |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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namespace Stack\DI\Resolver; |
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use Stack\DI\Exception; |
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use Stack\DI\Injection\LazyInterface; |
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/** |
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* Class ParameterResolver |
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* |
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* @author Andrzej Kostrzewa <[email protected]> |
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*/ |
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class ParameterResolver |
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{ |
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/** |
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* Resolve class constructor params |
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* |
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* @param $class |
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* @param $params |
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* @param array $mergeParams |
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* |
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* @throws Exception\MissingParam |
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* |
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* @return mixed |
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*/ |
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public function resolve($class, $params, $mergeParams = []) |
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{ |
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if (empty($mergeParams)) { |
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$this->mergeParamsEmpty($class, $params); |
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return $params; |
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} |
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$this->mergeParams($class, $params, $mergeParams); |
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return $params; |
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} |
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/** |
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* Merges the params with overrides; also invokes Lazy values. |
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* |
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* @param string $class The params are on this class. |
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* @param array $params The constructor parameters. |
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* @param array $mergeParams An array of override parameters. |
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* |
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* @throws Exception\MissingParam |
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* |
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* @return string[]|null |
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*/ |
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protected function mergeParams($class, &$params, array $mergeParams = []) |
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{ |
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$positionOfParam = 0; |
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foreach ($params as $key => $value) { |
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if (array_key_exists($positionOfParam, $mergeParams)) { |
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$value = $mergeParams[$positionOfParam]; |
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} elseif (array_key_exists($key, $mergeParams)) { |
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$value = $mergeParams[$key]; |
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} |
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if ($value instanceof UnresolvedParam) { |
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throw Exception::missingParam($class, $value->getName()); |
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} |
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if ($value instanceof LazyInterface) { |
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$value = $value(); |
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} |
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$params[$key] = $value; |
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$positionOfParam++; |
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} |
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} |
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/** |
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* Load the Lazy values in params when the mergeParams are empty. |
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* |
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* @param string $class The params are on this class. |
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* @param array $params The constructor parameters. |
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* |
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* @throws Exception\MissingParam |
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* |
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* @return null |
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*/ |
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protected function mergeParamsEmpty($class, &$params) |
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{ |
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foreach ($params as $key => $value) { |
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if ($value instanceof UnresolvedParam) { |
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throw Exception::missingParam($class, $value->getName()); |
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} |
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if ($value instanceof LazyInterface) { |
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$params[$key] = $value(); |
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} |
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} |
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} |
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} |
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devstackphp /
di
