comparison vendor/symfony/class-loader/ApcClassLoader.php @ 0:4c8ae668cc8c

Initial import (non-working)

+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <[e-mail]>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\ClassLoader;
+
+/**
+ * ApcClassLoader implements a wrapping autoloader cached in APC for PHP 5.3.
+ *
+ * It expects an object implementing a findFile method to find the file. This
+ * allows using it as a wrapper around the other loaders of the component (the
+ * ClassLoader for instance) but also around any other autoloaders following
+ * this convention (the Composer one for instance).
+ *
+ *     // with a Symfony autoloader
+ *     use Symfony\Component\ClassLoader\ClassLoader;
+ *
+ *     $loader = new ClassLoader();
+ *     $loader->addPrefix('Symfony\Component', __DIR__.'/component');
+ *     $loader->addPrefix('Symfony',           __DIR__.'/framework');
+ *
+ *     // or with a Composer autoloader
+ *     use Composer\Autoload\ClassLoader;
+ *
+ *     $loader = new ClassLoader();
+ *     $loader->add('Symfony\Component', __DIR__.'/component');
+ *     $loader->add('Symfony',           __DIR__.'/framework');
+ *
+ *     $cachedLoader = new ApcClassLoader('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 <[e-mail]>
+ * @author Kris Wallsmith <[e-mail]>
+ */
+class ApcClassLoader
+{
+    private $prefix;
+
+    /**
+     * A class loader object that implements the findFile() method.
+     *
+     * @var object
+     */
+    protected $decorated;
+
+    /**
+     * Constructor.
+     *
+     * @param string $prefix    The APC namespace prefix to use
+     * @param object $decorated A class loader object that implements the findFile() method
+     *
+     * @throws \RuntimeException
+     * @throws \InvalidArgumentException
+     */
+    public function __construct($prefix, $decorated)
+    {
+        if (!function_exists('apcu_fetch')) {
+            throw new \RuntimeException('Unable to use ApcClassLoader as APC is not installed.');
+        }
+
+        if (!method_exists($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 bool $prepend Whether to prepend the autoloader or not
+     */
+    public function register($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 $class The name of the class
+     *
+     * @return bool|null True, if loaded
+     */
+    public function loadClass($class)
+    {
+        if ($file = $this->findFile($class)) {
+            require $file;
+
+            return true;
+        }
+    }
+
+    /**
+     * Finds a file by class name while caching lookups to APC.
+     *
+     * @param string $class A class name to resolve to file
+     *
+     * @return string|null
+     */
+    public function findFile($class)
+    {
+        $file = apcu_fetch($this->prefix.$class, $success);
+
+        if (!$success) {
+            apcu_store($this->prefix.$class, $file = $this->decorated->findFile($class) ?: null);
+        }
+
+        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);
+    }
+}