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- <?php
- namespace Elgg;
- /**
- * A class/interface/trait autoloader for PHP
- *
- * It is able to load classes that use either:
- *
- * * The technical interoperability standards for PHP 5.3 namespaces and
- * class names (https://github.com/php-fig/fig-standards/blob/master/accepted/PSR-0.md);
- *
- * * The PEAR naming convention for classes (http://pear.php.net/).
- *
- * Classes from a sub-namespace or a sub-hierarchy of PEAR classes can be
- * looked for in a list of locations to ease the vendoring of a sub-set of
- * classes for large projects.
- *
- * All discovered files are stored in the internal class map and the map is
- * queried before attempting to find a file.
- *
- * Contains code from Symfony2's UniversalClassLoader.
- *
- * Copyright (c) 2004-2013 Fabien Potencier
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is furnished
- * to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in all
- * copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- * THE SOFTWARE.
- *
- * @access private
- *
- * @package Elgg.Core
- * @subpackage Autoloader
- * @author Fabien Potencier <fabien@symfony.com>
- */
- class ClassLoader {
- protected $namespaces = array();
- protected $prefixes = array();
- protected $fallbacks = array();
- /**
- * @var \Elgg\ClassMap Map of classes to files
- */
- protected $map;
- /**
- * Constructor
- *
- * @param \Elgg\ClassMap $map Class map
- */
- public function __construct(\Elgg\ClassMap $map) {
- $this->map = $map;
- }
- /**
- * Get the class map
- *
- * @return \Elgg\ClassMap
- */
- public function getClassMap() {
- return $this->map;
- }
- /**
- * Gets the configured namespaces.
- *
- * @return array A hash with namespaces as keys and directories as values
- */
- public function getNamespaces() {
- return $this->namespaces;
- }
- /**
- * Gets the configured class prefixes.
- *
- * @return array A hash with class prefixes as keys and directories as values
- */
- public function getPrefixes() {
- return $this->prefixes;
- }
- /**
- * Registers an array of namespaces
- *
- * @param array $namespaces An array of namespaces (namespaces as keys and locations as values)
- * @return void
- */
- public function registerNamespaces(array $namespaces) {
- foreach ($namespaces as $namespace => $locations) {
- $this->namespaces[$namespace] = (array)$locations;
- }
- }
- /**
- * Registers a namespace.
- *
- * @param string $namespace The namespace
- * @param array|string $paths The location(s) of the namespace
- * @return void
- */
- public function registerNamespace($namespace, $paths) {
- $this->namespaces[$namespace] = (array)$paths;
- }
- /**
- * Registers an array of classes using the PEAR naming convention.
- *
- * @param array $classes An array of classes (prefixes as keys and locations as values)
- * @return void
- */
- public function registerPrefixes(array $classes) {
- foreach ($classes as $prefix => $locations) {
- $this->prefixes[$prefix] = (array)$locations;
- }
- }
- /**
- * Registers a set of classes using the PEAR naming convention.
- *
- * @param string $prefix The classes prefix
- * @param array|string $paths The location(s) of the classes
- * @return void
- */
- public function registerPrefix($prefix, $paths) {
- $this->prefixes[$prefix] = (array)$paths;
- }
- /**
- * Add a directory to search if no registered directory is found.
- *
- * @param string $path The directory
- * @return void
- */
- public function addFallback($path) {
- $this->fallbacks[] = rtrim($path, '/\\');
- }
- /**
- * Registers this instance as an autoloader.
- *
- * @return void
- */
- public function register() {
- spl_autoload_register(array($this, 'loadClass'));
- }
- /**
- * Loads the given class or interface, possibly updating the class map.
- *
- * @param string $class The name of the class
- * @return void
- */
- public function loadClass($class) {
- $file = $this->map->getPath($class);
- if ($file && is_readable($file)) {
- require $file;
- return;
- }
- $file = $this->findFile($class);
- if ($file && is_readable($file)) {
- $this->map->setPath($class, $file);
- $this->map->setAltered(true);
- require $file;
- }
- }
- /**
- * Finds the path to the file where the class is defined.
- *
- * @param string $class The name of the class
- *
- * @return string|null The path, if found
- */
- public function findFile($class) {
- if ('\\' == $class[0]) {
- $class = substr($class, 1);
- }
- $pos = strrpos($class, '\\');
- if (false !== $pos) {
- // namespaced class name
- $namespace = substr($class, 0, $pos);
- $className = substr($class, $pos + 1);
- $normalizedClass = str_replace('\\', DIRECTORY_SEPARATOR, $namespace)
- . DIRECTORY_SEPARATOR
- . str_replace('_', DIRECTORY_SEPARATOR, $className) . '.php';
- foreach ($this->namespaces as $ns => $dirs) {
- if (0 !== strpos($namespace, $ns)) {
- continue;
- }
- foreach ($dirs as $dir) {
- $file = $dir . DIRECTORY_SEPARATOR . $normalizedClass;
- if (is_file($file)) {
- return $file;
- }
- }
- }
- } else {
- // PEAR-like class name
- $normalizedClass = str_replace('_', DIRECTORY_SEPARATOR, $class) . '.php';
- foreach ($this->prefixes as $prefix => $dirs) {
- if (0 !== strpos($class, $prefix)) {
- continue;
- }
- foreach ($dirs as $dir) {
- $file = $dir . DIRECTORY_SEPARATOR . $normalizedClass;
- if (is_file($file)) {
- return $file;
- }
- }
- }
- }
- foreach ($this->fallbacks as $dir) {
- $file = $dir . DIRECTORY_SEPARATOR . $normalizedClass;
- if (is_file($file)) {
- return $file;
- }
- }
- }
- }
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