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File: vendor/composer/ClassLoader.php

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File: vendor/composer/ClassLoader.php
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Description: Auxiliary script
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<?php /* * This file is part of Composer. * * (c) Nils Adermann <naderman@naderman.de> * Jordi Boggiano <j.boggiano@seld.be> * * For the full copyright and license information, please view the LICENSE * file that was distributed with this source code. */ namespace Composer\Autoload; /** * ClassLoader implements a PSR-0 class loader * * See https://github.com/php-fig/fig-standards/blob/master/accepted/PSR-0.md * * $loader = new \Composer\Autoload\ClassLoader(); * * // register classes with namespaces * $loader->add('Symfony\Component', __DIR__.'/component'); * $loader->add('Symfony', __DIR__.'/framework'); * * // activate the autoloader * $loader->register(); * * // to enable searching the include path (eg. for PEAR packages) * $loader->setUseIncludePath(true); * * In this example, if you try to use a class in the Symfony\Component * namespace or one of its children (Symfony\Component\Console for instance), * the autoloader will first look for the class under the component/ * directory, and it will then fallback to the framework/ directory if not * found before giving up. * * This class is loosely based on the Symfony UniversalClassLoader. * * @author Fabien Potencier <fabien@symfony.com> * @author Jordi Boggiano <j.boggiano@seld.be> */ class ClassLoader { // PSR-4 private $prefixLengthsPsr4 = array(); private $prefixDirsPsr4 = array(); private $fallbackDirsPsr4 = array(); // PSR-0 private $prefixesPsr0 = array(); private $fallbackDirsPsr0 = array(); private $useIncludePath = false; private $classMap = array(); private $classMapAuthoritative = false; public function getPrefixes() { if (!empty($this->prefixesPsr0)) { return call_user_func_array('array_merge', $this->prefixesPsr0); } return array(); } public function getPrefixesPsr4() { return $this->prefixDirsPsr4; } public function getFallbackDirs() { return $this->fallbackDirsPsr0; } public function getFallbackDirsPsr4() { return $this->fallbackDirsPsr4; } public function getClassMap() { return $this->classMap; } /** * @param array $classMap Class to filename map */ public function addClassMap(array $classMap) { if ($this->classMap) { $this->classMap = array_merge($this->classMap, $classMap); } else { $this->classMap = $classMap; } } /** * Registers a set of PSR-0 directories for a given prefix, either * appending or prepending to the ones previously set for this prefix. * * @param string $prefix The prefix * @param array|string $paths The PSR-0 root directories * @param bool $prepend Whether to prepend the directories */ public function add($prefix, $paths, $prepend = false) { if (!$prefix) { if ($prepend) { $this->fallbackDirsPsr0 = array_merge( (array) $paths, $this->fallbackDirsPsr0 ); } else { $this->fallbackDirsPsr0 = array_merge( $this->fallbackDirsPsr0, (array) $paths ); } return; } $first = $prefix[0]; if (!isset($this->prefixesPsr0[$first][$prefix])) { $this->prefixesPsr0[$first][$prefix] = (array) $paths; return; } if ($prepend) { $this->prefixesPsr0[$first][$prefix] = array_merge( (array) $paths, $this->prefixesPsr0[$first][$prefix] ); } else { $this->prefixesPsr0[$first][$prefix] = array_merge( $this->prefixesPsr0[$first][$prefix], (array) $paths ); } } /** * Registers a set of PSR-4 directories for a given namespace, either * appending or prepending to the ones previously set for this namespace. * * @param string $prefix The prefix/namespace, with trailing '\\' * @param array|string $paths The PSR-0 base directories * @param bool $prepend Whether to prepend the directories * * @throws \InvalidArgumentException */ public function addPsr4($prefix, $paths, $prepend = false) { if (!$prefix) { // Register directories for the root namespace. if ($prepend) { $this->fallbackDirsPsr4 = array_merge( (array) $paths, $this->fallbackDirsPsr4 ); } else { $this->fallbackDirsPsr4 = array_merge( $this->fallbackDirsPsr4, (array) $paths ); } } elseif (!isset($this->prefixDirsPsr4[$prefix])) { // Register directories for a new namespace. $length = strlen($prefix); if ('\\' !== $prefix[$length - 1]) { throw new \InvalidArgumentException("A non-empty PSR-4 prefix must end with a namespace separator."); } $this->prefixLengthsPsr4[$prefix[0]][$prefix] = $length; $this->prefixDirsPsr4[$prefix] = (array) $paths; } elseif ($prepend) { // Prepend directories for an already registered namespace. $this->prefixDirsPsr4[$prefix] = array_merge( (array) $paths, $this->prefixDirsPsr4[$prefix] ); } else { // Append directories for an already registered namespace. $this->prefixDirsPsr4[$prefix] = array_merge( $this->prefixDirsPsr4[$prefix], (array) $paths ); } } /** * Registers a set of PSR-0 directories for a given prefix, * replacing any others previously set for this prefix. * * @param string $prefix The prefix * @param array|string $paths The PSR-0 base directories */ public function set($prefix, $paths) { if (!$prefix) { $this->fallbackDirsPsr0 = (array) $paths; } else { $this->prefixesPsr0[$prefix[0]][$prefix] = (array) $paths; } } /** * Registers a set of PSR-4 directories for a given namespace, * replacing any others previously set for this namespace. * * @param string $prefix The prefix/namespace, with trailing '\\' * @param array|string $paths The PSR-4 base directories * * @throws \InvalidArgumentException */ public function setPsr4($prefix, $paths) { if (!$prefix) { $this->fallbackDirsPsr4 = (array) $paths; } else { $length = strlen($prefix); if ('\\' !== $prefix[$length - 1]) { throw new \InvalidArgumentException("A non-empty PSR-4 prefix must end with a namespace separator."); } $this->prefixLengthsPsr4[$prefix[0]][$prefix] = $length; $this->prefixDirsPsr4[$prefix] = (array) $paths; } } /** * Turns on searching the include path for class files. * * @param bool $useIncludePath */ public function setUseIncludePath($useIncludePath) { $this->useIncludePath = $useIncludePath; } /** * Can be used to check if the autoloader uses the include path to check * for classes. * * @return bool */ public function getUseIncludePath() { return $this->useIncludePath; } /** * Turns off searching the prefix and fallback directories for classes * that have not been registered with the class map. * * @param bool $classMapAuthoritative */ public function setClassMapAuthoritative($classMapAuthoritative) { $this->classMapAuthoritative = $classMapAuthoritative; } /** * Should class lookup fail if not found in the current class map? * * @return bool */ public function isClassMapAuthoritative() { return $this->classMapAuthoritative; } /** * 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 $class The name of the class * @return bool|null True if loaded, null otherwise */ public function loadClass($class) { if ($file = $this->findFile($class)) { includeFile($file); return true; } } /** * Finds the path to the file where the class is defined. * * @param string $class The name of the class * * @return string|false The path if found, false otherwise */ public function findFile($class) { // work around for PHP 5.3.0 - 5.3.2 https://bugs.php.net/50731 if ('\\' == $class[0]) { $class = substr($class, 1); } // class map lookup if (isset($this->classMap[$class])) { return $this->classMap[$class]; } if ($this->classMapAuthoritative) { return false; } $file = $this->findFileWithExtension($class, '.php'); // Search for Hack files if we are running on HHVM if ($file === null && defined('HHVM_VERSION')) { $file = $this->findFileWithExtension($class, '.hh'); } if ($file === null) { // Remember that this class does not exist. return $this->classMap[$class] = false; } return $file; } private function findFileWithExtension($class, $ext) { // PSR-4 lookup $logicalPathPsr4 = strtr($class, '\\', DIRECTORY_SEPARATOR) . $ext; $first = $class[0]; if (isset($this->prefixLengthsPsr4[$first])) { foreach ($this->prefixLengthsPsr4[$first] as $prefix => $length) { if (0 === strpos($class, $prefix)) { foreach ($this->prefixDirsPsr4[$prefix] as $dir) { if (is_file($file = $dir . DIRECTORY_SEPARATOR . substr($logicalPathPsr4, $length))) { return $file; } } } } } // PSR-4 fallback dirs foreach ($this->fallbackDirsPsr4 as $dir) { if (is_file($file = $dir . DIRECTORY_SEPARATOR . $logicalPathPsr4)) { return $file; } } // PSR-0 lookup if (false !== $pos = strrpos($class, '\\')) { // namespaced class name $logicalPathPsr0 = substr($logicalPathPsr4, 0, $pos + 1) . strtr(substr($logicalPathPsr4, $pos + 1), '_', DIRECTORY_SEPARATOR); } else { // PEAR-like class name $logicalPathPsr0 = strtr($class, '_', DIRECTORY_SEPARATOR) . $ext; } if (isset($this->prefixesPsr0[$first])) { foreach ($this->prefixesPsr0[$first] as $prefix => $dirs) { if (0 === strpos($class, $prefix)) { foreach ($dirs as $dir) { if (is_file($file = $dir . DIRECTORY_SEPARATOR . $logicalPathPsr0)) { return $file; } } } } } // PSR-0 fallback dirs foreach ($this->fallbackDirsPsr0 as $dir) { if (is_file($file = $dir . DIRECTORY_SEPARATOR . $logicalPathPsr0)) { return $file; } } // PSR-0 include paths. if ($this->useIncludePath && $file = stream_resolve_include_path($logicalPathPsr0)) { return $file; } } } /** * Scope isolated include. * * Prevents access to $this/self from included files. */ function includeFile($file) { include $file; }