Chris@0: <?php
Chris@0: /*
Chris@0:  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
Chris@0:  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
Chris@0:  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
Chris@0:  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
Chris@0:  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
Chris@0:  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
Chris@0:  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
Chris@0:  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
Chris@0:  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
Chris@0:  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
Chris@0:  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
Chris@0:  *
Chris@0:  * This software consists of voluntary contributions made by many individuals
Chris@0:  * and is licensed under the MIT license. For more information, see
Chris@0:  * <http://www.doctrine-project.org>.
Chris@0:  */
Chris@0: 
Chris@0: namespace Doctrine\Common\Annotations;
Chris@0: 
Chris@0: use Doctrine\Common\Cache\Cache;
Chris@0: 
Chris@0: /**
Chris@0:  * A cache aware annotation reader.
Chris@0:  *
Chris@0:  * @author Johannes M. Schmitt <schmittjoh@gmail.com>
Chris@0:  * @author Benjamin Eberlei <kontakt@beberlei.de>
Chris@0:  */
Chris@0: final class CachedReader implements Reader
Chris@0: {
Chris@0:     /**
Chris@0:      * @var string
Chris@0:      */
Chris@0:     private static $CACHE_SALT = '@[Annot]';
Chris@0: 
Chris@0:     /**
Chris@0:      * @var Reader
Chris@0:      */
Chris@0:     private $delegate;
Chris@0: 
Chris@0:     /**
Chris@0:      * @var Cache
Chris@0:      */
Chris@0:     private $cache;
Chris@0: 
Chris@0:     /**
Chris@0:      * @var boolean
Chris@0:      */
Chris@0:     private $debug;
Chris@0: 
Chris@0:     /**
Chris@0:      * @var array
Chris@0:      */
Chris@0:     private $loadedAnnotations = array();
Chris@0: 
Chris@0:     /**
Chris@0:      * Constructor.
Chris@0:      *
Chris@0:      * @param Reader $reader
Chris@0:      * @param Cache  $cache
Chris@0:      * @param bool   $debug
Chris@0:      */
Chris@0:     public function __construct(Reader $reader, Cache $cache, $debug = false)
Chris@0:     {
Chris@0:         $this->delegate = $reader;
Chris@0:         $this->cache = $cache;
Chris@0:         $this->debug = (boolean) $debug;
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * {@inheritDoc}
Chris@0:      */
Chris@0:     public function getClassAnnotations(\ReflectionClass $class)
Chris@0:     {
Chris@0:         $cacheKey = $class->getName();
Chris@0: 
Chris@0:         if (isset($this->loadedAnnotations[$cacheKey])) {
Chris@0:             return $this->loadedAnnotations[$cacheKey];
Chris@0:         }
Chris@0: 
Chris@0:         if (false === ($annots = $this->fetchFromCache($cacheKey, $class))) {
Chris@0:             $annots = $this->delegate->getClassAnnotations($class);
Chris@0:             $this->saveToCache($cacheKey, $annots);
Chris@0:         }
Chris@0: 
Chris@0:         return $this->loadedAnnotations[$cacheKey] = $annots;
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * {@inheritDoc}
Chris@0:      */
Chris@0:     public function getClassAnnotation(\ReflectionClass $class, $annotationName)
Chris@0:     {
Chris@0:         foreach ($this->getClassAnnotations($class) as $annot) {
Chris@0:             if ($annot instanceof $annotationName) {
Chris@0:                 return $annot;
Chris@0:             }
Chris@0:         }
Chris@0: 
Chris@0:         return null;
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * {@inheritDoc}
Chris@0:      */
Chris@0:     public function getPropertyAnnotations(\ReflectionProperty $property)
Chris@0:     {
Chris@0:         $class = $property->getDeclaringClass();
Chris@0:         $cacheKey = $class->getName().'$'.$property->getName();
Chris@0: 
Chris@0:         if (isset($this->loadedAnnotations[$cacheKey])) {
Chris@0:             return $this->loadedAnnotations[$cacheKey];
Chris@0:         }
Chris@0: 
Chris@0:         if (false === ($annots = $this->fetchFromCache($cacheKey, $class))) {
Chris@0:             $annots = $this->delegate->getPropertyAnnotations($property);
Chris@0:             $this->saveToCache($cacheKey, $annots);
Chris@0:         }
Chris@0: 
Chris@0:         return $this->loadedAnnotations[$cacheKey] = $annots;
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * {@inheritDoc}
Chris@0:      */
Chris@0:     public function getPropertyAnnotation(\ReflectionProperty $property, $annotationName)
Chris@0:     {
Chris@0:         foreach ($this->getPropertyAnnotations($property) as $annot) {
Chris@0:             if ($annot instanceof $annotationName) {
Chris@0:                 return $annot;
Chris@0:             }
Chris@0:         }
Chris@0: 
Chris@0:         return null;
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * {@inheritDoc}
Chris@0:      */
Chris@0:     public function getMethodAnnotations(\ReflectionMethod $method)
Chris@0:     {
Chris@0:         $class = $method->getDeclaringClass();
Chris@0:         $cacheKey = $class->getName().'#'.$method->getName();
Chris@0: 
Chris@0:         if (isset($this->loadedAnnotations[$cacheKey])) {
Chris@0:             return $this->loadedAnnotations[$cacheKey];
Chris@0:         }
Chris@0: 
Chris@0:         if (false === ($annots = $this->fetchFromCache($cacheKey, $class))) {
Chris@0:             $annots = $this->delegate->getMethodAnnotations($method);
Chris@0:             $this->saveToCache($cacheKey, $annots);
Chris@0:         }
Chris@0: 
Chris@0:         return $this->loadedAnnotations[$cacheKey] = $annots;
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * {@inheritDoc}
Chris@0:      */
Chris@0:     public function getMethodAnnotation(\ReflectionMethod $method, $annotationName)
Chris@0:     {
Chris@0:         foreach ($this->getMethodAnnotations($method) as $annot) {
Chris@0:             if ($annot instanceof $annotationName) {
Chris@0:                 return $annot;
Chris@0:             }
Chris@0:         }
Chris@0: 
Chris@0:         return null;
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Clears loaded annotations.
Chris@0:      *
Chris@0:      * @return void
Chris@0:      */
Chris@0:     public function clearLoadedAnnotations()
Chris@0:     {
Chris@0:         $this->loadedAnnotations = array();
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Fetches a value from the cache.
Chris@0:      *
Chris@0:      * @param string           $rawCacheKey The cache key.
Chris@0:      * @param \ReflectionClass $class       The related class.
Chris@0:      *
Chris@0:      * @return mixed The cached value or false when the value is not in cache.
Chris@0:      */
Chris@0:     private function fetchFromCache($rawCacheKey, \ReflectionClass $class)
Chris@0:     {
Chris@0:         $cacheKey = $rawCacheKey . self::$CACHE_SALT;
Chris@0:         if (($data = $this->cache->fetch($cacheKey)) !== false) {
Chris@0:             if (!$this->debug || $this->isCacheFresh($cacheKey, $class)) {
Chris@0:                 return $data;
Chris@0:             }
Chris@0:         }
Chris@0: 
Chris@0:         return false;
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Saves a value to the cache.
Chris@0:      *
Chris@0:      * @param string $rawCacheKey The cache key.
Chris@0:      * @param mixed  $value       The value.
Chris@0:      *
Chris@0:      * @return void
Chris@0:      */
Chris@0:     private function saveToCache($rawCacheKey, $value)
Chris@0:     {
Chris@0:         $cacheKey = $rawCacheKey . self::$CACHE_SALT;
Chris@0:         $this->cache->save($cacheKey, $value);
Chris@0:         if ($this->debug) {
Chris@0:             $this->cache->save('[C]'.$cacheKey, time());
Chris@0:         }
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Checks if the cache is fresh.
Chris@0:      *
Chris@0:      * @param string           $cacheKey
Chris@0:      * @param \ReflectionClass $class
Chris@0:      *
Chris@0:      * @return boolean
Chris@0:      */
Chris@0:     private function isCacheFresh($cacheKey, \ReflectionClass $class)
Chris@0:     {
Chris@0:         if (false === $filename = $class->getFilename()) {
Chris@0:             return true;
Chris@0:         }
Chris@0: 
Chris@0:         return $this->cache->fetch('[C]'.$cacheKey) >= filemtime($filename);
Chris@0:     }
Chris@0: }