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vendor/doctrine/annotations/lib/Doctrine/Common/Annotations/PsrCachedReader.php

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+<?php
+
+namespace Doctrine\Common\Annotations;
+
+use Psr\Cache\CacheItemPoolInterface;
+use ReflectionClass;
+use ReflectionMethod;
+use ReflectionProperty;
+use Reflector;
+
+use function array_map;
+use function array_merge;
+use function assert;
+use function filemtime;
+use function max;
+use function rawurlencode;
+use function time;
+
+/**
+ * A cache aware annotation reader.
+ */
+final class PsrCachedReader implements Reader
+{
+    /** @var Reader */
+    private $delegate;
+
+    /** @var CacheItemPoolInterface */
+    private $cache;
+
+    /** @var bool */
+    private $debug;
+
+    /** @var array<string, array<object>> */
+    private $loadedAnnotations = [];
+
+    /** @var int[] */
+    private $loadedFilemtimes = [];
+
+    public function __construct(Reader $reader, CacheItemPoolInterface $cache, bool $debug = false)
+    {
+        $this->delegate = $reader;
+        $this->cache    = $cache;
+        $this->debug    = (bool) $debug;
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public function getClassAnnotations(ReflectionClass $class)
+    {
+        $cacheKey = $class->getName();
+
+        if (isset($this->loadedAnnotations[$cacheKey])) {
+            return $this->loadedAnnotations[$cacheKey];
+        }
+
+        $annots = $this->fetchFromCache($cacheKey, $class, 'getClassAnnotations', $class);
+
+        return $this->loadedAnnotations[$cacheKey] = $annots;
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public function getClassAnnotation(ReflectionClass $class, $annotationName)
+    {
+        foreach ($this->getClassAnnotations($class) as $annot) {
+            if ($annot instanceof $annotationName) {
+                return $annot;
+            }
+        }
+
+        return null;
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public function getPropertyAnnotations(ReflectionProperty $property)
+    {
+        $class    = $property->getDeclaringClass();
+        $cacheKey = $class->getName() . '$' . $property->getName();
+
+        if (isset($this->loadedAnnotations[$cacheKey])) {
+            return $this->loadedAnnotations[$cacheKey];
+        }
+
+        $annots = $this->fetchFromCache($cacheKey, $class, 'getPropertyAnnotations', $property);
+
+        return $this->loadedAnnotations[$cacheKey] = $annots;
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public function getPropertyAnnotation(ReflectionProperty $property, $annotationName)
+    {
+        foreach ($this->getPropertyAnnotations($property) as $annot) {
+            if ($annot instanceof $annotationName) {
+                return $annot;
+            }
+        }
+
+        return null;
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public function getMethodAnnotations(ReflectionMethod $method)
+    {
+        $class    = $method->getDeclaringClass();
+        $cacheKey = $class->getName() . '#' . $method->getName();
+
+        if (isset($this->loadedAnnotations[$cacheKey])) {
+            return $this->loadedAnnotations[$cacheKey];
+        }
+
+        $annots = $this->fetchFromCache($cacheKey, $class, 'getMethodAnnotations', $method);
+
+        return $this->loadedAnnotations[$cacheKey] = $annots;
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public function getMethodAnnotation(ReflectionMethod $method, $annotationName)
+    {
+        foreach ($this->getMethodAnnotations($method) as $annot) {
+            if ($annot instanceof $annotationName) {
+                return $annot;
+            }
+        }
+
+        return null;
+    }
+
+    public function clearLoadedAnnotations(): void
+    {
+        $this->loadedAnnotations = [];
+        $this->loadedFilemtimes  = [];
+    }
+
+    /** @return mixed[] */
+    private function fetchFromCache(
+        string $cacheKey,
+        ReflectionClass $class,
+        string $method,
+        Reflector $reflector
+    ): array {
+        $cacheKey = rawurlencode($cacheKey);
+
+        $item = $this->cache->getItem($cacheKey);
+        if (($this->debug && ! $this->refresh($cacheKey, $class)) || ! $item->isHit()) {
+            $this->cache->save($item->set($this->delegate->{$method}($reflector)));
+        }
+
+        return $item->get();
+    }
+
+    /**
+     * Used in debug mode to check if the cache is fresh.
+     *
+     * @return bool Returns true if the cache was fresh, or false if the class
+     * being read was modified since writing to the cache.
+     */
+    private function refresh(string $cacheKey, ReflectionClass $class): bool
+    {
+        $lastModification = $this->getLastModification($class);
+        if ($lastModification === 0) {
+            return true;
+        }
+
+        $item = $this->cache->getItem('[C]' . $cacheKey);
+        if ($item->isHit() && $item->get() >= $lastModification) {
+            return true;
+        }
+
+        $this->cache->save($item->set(time()));
+
+        return false;
+    }
+
+    /**
+     * Returns the time the class was last modified, testing traits and parents
+     */
+    private function getLastModification(ReflectionClass $class): int
+    {
+        $filename = $class->getFileName();
+
+        if (isset($this->loadedFilemtimes[$filename])) {
+            return $this->loadedFilemtimes[$filename];
+        }
+
+        $parent = $class->getParentClass();
+
+        $lastModification =  max(array_merge(
+            [$filename ? filemtime($filename) : 0],
+            array_map(function (ReflectionClass $reflectionTrait): int {
+                return $this->getTraitLastModificationTime($reflectionTrait);
+            }, $class->getTraits()),
+            array_map(function (ReflectionClass $class): int {
+                return $this->getLastModification($class);
+            }, $class->getInterfaces()),
+            $parent ? [$this->getLastModification($parent)] : []
+        ));
+
+        assert($lastModification !== false);
+
+        return $this->loadedFilemtimes[$filename] = $lastModification;
+    }
+
+    private function getTraitLastModificationTime(ReflectionClass $reflectionTrait): int
+    {
+        $fileName = $reflectionTrait->getFileName();
+
+        if (isset($this->loadedFilemtimes[$fileName])) {
+            return $this->loadedFilemtimes[$fileName];
+        }
+
+        $lastModificationTime = max(array_merge(
+            [$fileName ? filemtime($fileName) : 0],
+            array_map(function (ReflectionClass $reflectionTrait): int {
+                return $this->getTraitLastModificationTime($reflectionTrait);
+            }, $reflectionTrait->getTraits())
+        ));
+
+        assert($lastModificationTime !== false);
+
+        return $this->loadedFilemtimes[$fileName] = $lastModificationTime;
+    }
+}