symfony · fabpot · Mar 23, 2013 · Feb 14, 2013
diff --git a/src/Symfony/Component/ClassLoader/WinCacheClassLoader.php b/src/Symfony/Component/ClassLoader/WinCacheClassLoader.php
@@ -0,0 +1,138 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <[email protected]>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\ClassLoader;
+
+/**
+ * WinCacheClassLoader implements a wrapping autoloader cached in WinCache for PHP 5.3.
+ *
+ * It expects an object implementing a findFile method to find the file. This
+ * allow using it as a wrapper around the other loaders of the component (the
+ * ClassLoader and the UniversalClassLoader for instance) but also around any
+ * other autoloader following this convention (the Composer one for instance)
+ *
+ *     $loader = new ClassLoader();
+ *
+ *     // register classes with namespaces
+ *     $loader->add('Symfony\Component', __DIR__.'/component');
+ *     $loader->add('Symfony',           __DIR__.'/framework');
+ *
+ *     $cachedLoader = new WinCacheClassLoader('my_prefix', $loader);
+ *
+ *     // activate the cached autoloader
+ *     $cachedLoader->register();
+ *
+ *     // eventually deactivate the non-cached loader if it was registered previously
+ *     // to be sure to use the cached one.
+ *     $loader->unregister();
+ *
+ * @author Fabien Potencier <[email protected]>
+ * @author Kris Wallsmith <[email protected]>
+ * @author Artem Ryzhkov <[email protected]>
+ *
+ * @api
+ */
+class WinCacheClassLoader
+{
+    private $prefix;
+
+    /**
+     * The class loader object being decorated.
+     *
+     * @var \Symfony\Component\ClassLoader\ClassLoader
+     *   A class loader object that implements the findFile() method.
+     */
+    protected $decorated;
+
+    /**
+     * Constructor.
+     *
+     * @param string $prefix      The WinCache namespace prefix to use.
+     * @param object $decorated   A class loader object that implements the findFile() method.
+     *
+     * @throws \RuntimeException
+     * @throws \InvalidArgumentException
+     *
+     * @api
+     */
+    public function __construct($prefix, $decorated)
+    {
+        if (!extension_loaded('wincache')) {
+            throw new \RuntimeException('Unable to use WinCacheClassLoader as WinCache is not enabled.');
+        }
+
+        if (!method_exists($decorated, 'findFile')) {
+            throw new \InvalidArgumentException('The class finder must implement a "findFile" method.');
+        }
+
+        $this->prefix = $prefix;
+        $this->decorated = $decorated;
+    }
+
+    /**
+     * Registers this instance as an autoloader.
+     *
+     * @param Boolean $prepend Whether to prepend the autoloader or not
+     */
+    public function register($prepend = false)
+    {
+        spl_autoload_register(array($this, 'loadClass'), true, $prepend);
+    }
+
+    /**
+     * Unregisters this instance as an autoloader.
+     */
+    public function unregister()
+    {
+        spl_autoload_unregister(array($this, 'loadClass'));
+    }
+
+    /**
+     * Loads the given class or interface.
+     *
+     * @param string $class The name of the class
+     *
+     * @return Boolean|null True, if loaded
+     */
+    public function loadClass($class)
+    {
+        if ($file = $this->findFile($class)) {
+            require $file;
+
+            return true;
+        }
+    }
+
+    /**
+     * Finds a file by class name while caching lookups to WinCache.
+     *
+     * @param string $class A class name to resolve to file
+     *
+     * @return string|null
+     */
+    public function findFile($class)
+    {
+        if (false === $file = wincache_ucache_get($this->prefix.$class)) {
+            wincache_ucache_set($this->prefix.$class, $file = $this->decorated->findFile($class), 0);
+        }
+
+        return $file;
+    }
+
+    /**
+     * Passes through all unknown calls onto the decorated object.
+     */
+    public function __call($method, $args)
+    {
+        return call_user_func_array(array($this->decorated, $method), $args);
+    }
+
+}