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<?php |
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namespace Yiisoft\Cache\Dependency; |
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use Yiisoft\Cache\CacheInterface; |
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/** |
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* ChainedDependency represents a dependency which is composed of a list of other dependencies. |
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* |
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* When {@see dependOnAll} is true, if any of the dependencies has changed, this dependency is |
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* considered changed; When {@see dependOnAll} is false, if one of the dependencies has NOT changed, |
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* this dependency is considered NOT changed. |
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* |
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* For more details and usage information on Cache, see the [guide article on caching](guide:caching-overview). |
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*/ |
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final class ChainedDependency extends Dependency |
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{ |
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/** |
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* @var Dependency[] |
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*/ |
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private $dependencies; |
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/** |
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* @var bool |
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*/ |
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private $dependOnAll; |
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/** |
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* ChainedDependency constructor. |
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* @param Dependency[] $dependencies list of dependencies that this dependency is composed of. |
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* Each array element must be a dependency object. |
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* @param bool $dependOnAll whether this dependency is depending on every dependency in {@see dependencies}. |
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* Defaults to true, meaning if any of the dependencies has changed, this dependency is considered changed. |
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* When it is set false, it means if one of the dependencies has NOT changed, this dependency |
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* is considered NOT changed. |
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*/ |
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public function __construct(array $dependencies = [], bool $dependOnAll = true) |
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{ |
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$this->dependencies = $dependencies; |
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$this->dependOnAll = $dependOnAll; |
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} |
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/** |
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* Evaluates the dependency by generating and saving the data related with dependency. |
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* @param CacheInterface $cache the cache component that is currently evaluating this dependency |
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*/ |
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public function evaluateDependency(CacheInterface $cache): void |
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{ |
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foreach ($this->dependencies as $dependency) { |
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$dependency->evaluateDependency($cache); |
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} |
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} |
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/** |
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* Generates the data needed to determine if dependency has been changed. |
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* This method does nothing in this class. |
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* @param CacheInterface $cache the cache component that is currently evaluating this dependency |
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* @return mixed the data needed to determine if dependency has been changed. |
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*/ |
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protected function generateDependencyData(CacheInterface $cache) |
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{ |
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return null; |
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} |
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public function isChanged(CacheInterface $cache): bool |
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{ |
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foreach ($this->dependencies as $dependency) { |
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if ($this->dependOnAll && $dependency->isChanged($cache)) { |
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return true; |
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} |
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if (!$this->dependOnAll && !$dependency->isChanged($cache)) { |
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return false; |
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} |
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} |
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return !$this->dependOnAll; |
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} |
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} |
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yiisoft /
cache
