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-rw-r--r--vendor/composer/ClassLoader.php246
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1<?php
2
3/*
4 * This file is part of Composer.
5 *
6 * (c) Nils Adermann <naderman@naderman.de>
7 * Jordi Boggiano <j.boggiano@seld.be>
8 *
9 * For the full copyright and license information, please view the LICENSE
10 * file that was distributed with this source code.
11 */
12
13namespace Composer\Autoload;
14
15/**
16 * ClassLoader implements a PSR-0 class loader
17 *
18 * See https://github.com/php-fig/fig-standards/blob/master/accepted/PSR-0.md
19 *
20 * $loader = new \Composer\Autoload\ClassLoader();
21 *
22 * // register classes with namespaces
23 * $loader->add('Symfony\Component', __DIR__.'/component');
24 * $loader->add('Symfony', __DIR__.'/framework');
25 *
26 * // activate the autoloader
27 * $loader->register();
28 *
29 * // to enable searching the include path (eg. for PEAR packages)
30 * $loader->setUseIncludePath(true);
31 *
32 * In this example, if you try to use a class in the Symfony\Component
33 * namespace or one of its children (Symfony\Component\Console for instance),
34 * the autoloader will first look for the class under the component/
35 * directory, and it will then fallback to the framework/ directory if not
36 * found before giving up.
37 *
38 * This class is loosely based on the Symfony UniversalClassLoader.
39 *
40 * @author Fabien Potencier <fabien@symfony.com>
41 * @author Jordi Boggiano <j.boggiano@seld.be>
42 */
43class ClassLoader
44{
45 private $prefixes = array();
46 private $fallbackDirs = array();
47 private $useIncludePath = false;
48 private $classMap = array();
49
50 public function getPrefixes()
51 {
52 return call_user_func_array('array_merge', $this->prefixes);
53 }
54
55 public function getFallbackDirs()
56 {
57 return $this->fallbackDirs;
58 }
59
60 public function getClassMap()
61 {
62 return $this->classMap;
63 }
64
65 /**
66 * @param array $classMap Class to filename map
67 */
68 public function addClassMap(array $classMap)
69 {
70 if ($this->classMap) {
71 $this->classMap = array_merge($this->classMap, $classMap);
72 } else {
73 $this->classMap = $classMap;
74 }
75 }
76
77 /**
78 * Registers a set of classes, merging with any others previously set.
79 *
80 * @param string $prefix The classes prefix
81 * @param array|string $paths The location(s) of the classes
82 * @param bool $prepend Prepend the location(s)
83 */
84 public function add($prefix, $paths, $prepend = false)
85 {
86 if (!$prefix) {
87 if ($prepend) {
88 $this->fallbackDirs = array_merge(
89 (array) $paths,
90 $this->fallbackDirs
91 );
92 } else {
93 $this->fallbackDirs = array_merge(
94 $this->fallbackDirs,
95 (array) $paths
96 );
97 }
98
99 return;
100 }
101
102 $first = $prefix[0];
103 if (!isset($this->prefixes[$first][$prefix])) {
104 $this->prefixes[$first][$prefix] = (array) $paths;
105
106 return;
107 }
108 if ($prepend) {
109 $this->prefixes[$first][$prefix] = array_merge(
110 (array) $paths,
111 $this->prefixes[$first][$prefix]
112 );
113 } else {
114 $this->prefixes[$first][$prefix] = array_merge(
115 $this->prefixes[$first][$prefix],
116 (array) $paths
117 );
118 }
119 }
120
121 /**
122 * Registers a set of classes, replacing any others previously set.
123 *
124 * @param string $prefix The classes prefix
125 * @param array|string $paths The location(s) of the classes
126 */
127 public function set($prefix, $paths)
128 {
129 if (!$prefix) {
130 $this->fallbackDirs = (array) $paths;
131
132 return;
133 }
134 $this->prefixes[substr($prefix, 0, 1)][$prefix] = (array) $paths;
135 }
136
137 /**
138 * Turns on searching the include path for class files.
139 *
140 * @param bool $useIncludePath
141 */
142 public function setUseIncludePath($useIncludePath)
143 {
144 $this->useIncludePath = $useIncludePath;
145 }
146
147 /**
148 * Can be used to check if the autoloader uses the include path to check
149 * for classes.
150 *
151 * @return bool
152 */
153 public function getUseIncludePath()
154 {
155 return $this->useIncludePath;
156 }
157
158 /**
159 * Registers this instance as an autoloader.
160 *
161 * @param bool $prepend Whether to prepend the autoloader or not
162 */
163 public function register($prepend = false)
164 {
165 spl_autoload_register(array($this, 'loadClass'), true, $prepend);
166 }
167
168 /**
169 * Unregisters this instance as an autoloader.
170 */
171 public function unregister()
172 {
173 spl_autoload_unregister(array($this, 'loadClass'));
174 }
175
176 /**
177 * Loads the given class or interface.
178 *
179 * @param string $class The name of the class
180 * @return bool|null True if loaded, null otherwise
181 */
182 public function loadClass($class)
183 {
184 if ($file = $this->findFile($class)) {
185 include $file;
186
187 return true;
188 }
189 }
190
191 /**
192 * Finds the path to the file where the class is defined.
193 *
194 * @param string $class The name of the class
195 *
196 * @return string|false The path if found, false otherwise
197 */
198 public function findFile($class)
199 {
200 // work around for PHP 5.3.0 - 5.3.2 https://bugs.php.net/50731
201 if ('\\' == $class[0]) {
202 $class = substr($class, 1);
203 }
204
205 if (isset($this->classMap[$class])) {
206 return $this->classMap[$class];
207 }
208
209 if (false !== $pos = strrpos($class, '\\')) {
210 // namespaced class name
211 $classPath = strtr(substr($class, 0, $pos), '\\', DIRECTORY_SEPARATOR) . DIRECTORY_SEPARATOR;
212 $className = substr($class, $pos + 1);
213 } else {
214 // PEAR-like class name
215 $classPath = null;
216 $className = $class;
217 }
218
219 $classPath .= strtr($className, '_', DIRECTORY_SEPARATOR) . '.php';
220
221 $first = $class[0];
222 if (isset($this->prefixes[$first])) {
223 foreach ($this->prefixes[$first] as $prefix => $dirs) {
224 if (0 === strpos($class, $prefix)) {
225 foreach ($dirs as $dir) {
226 if (file_exists($dir . DIRECTORY_SEPARATOR . $classPath)) {
227 return $dir . DIRECTORY_SEPARATOR . $classPath;
228 }
229 }
230 }
231 }
232 }
233
234 foreach ($this->fallbackDirs as $dir) {
235 if (file_exists($dir . DIRECTORY_SEPARATOR . $classPath)) {
236 return $dir . DIRECTORY_SEPARATOR . $classPath;
237 }
238 }
239
240 if ($this->useIncludePath && $file = stream_resolve_include_path($classPath)) {
241 return $file;
242 }
243
244 return $this->classMap[$class] = false;
245 }
246}
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