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| Rev | Author | Line No. | Line |
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| 40 | PointedEar | 1 | <?php |
| 2 | /** |
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| 3 | * Zend Framework (http://framework.zend.com/) |
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| 4 | * |
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| 5 | * @link http://github.com/zendframework/zf2 for the canonical source repository |
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| 6 | * @copyright Copyright (c) 2005-2013 Zend Technologies USA Inc. (http://www.zend.com) |
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| 7 | * @license http://framework.zend.com/license/new-bsd New BSD License |
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| 8 | */ |
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| 9 | |||
| 10 | namespace Zend\Loader; |
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| 11 | |||
| 12 | // Grab SplAutoloader interface |
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| 13 | require_once __DIR__ . '/SplAutoloader.php'; |
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| 14 | |||
| 15 | /** |
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| 16 | * PSR-0 compliant autoloader |
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| 17 | * |
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| 18 | * Allows autoloading both namespaced and vendor-prefixed classes. Class |
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| 19 | * lookups are performed on the filesystem. If a class file for the referenced |
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| 20 | * class is not found, a PHP warning will be raised by include(). |
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| 21 | */ |
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| 22 | class StandardAutoloader implements SplAutoloader |
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| 23 | { |
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| 24 | const NS_SEPARATOR = '\\'; |
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| 25 | const PREFIX_SEPARATOR = '_'; |
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| 26 | const LOAD_NS = 'namespaces'; |
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| 27 | const LOAD_PREFIX = 'prefixes'; |
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| 28 | const ACT_AS_FALLBACK = 'fallback_autoloader'; |
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| 29 | const AUTOREGISTER_ZF = 'autoregister_zf'; |
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| 30 | |||
| 31 | /** |
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| 32 | * @var array Namespace/directory pairs to search; ZF library added by default |
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| 33 | */ |
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| 34 | protected $namespaces = array(); |
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| 35 | |||
| 36 | /** |
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| 37 | * @var array Prefix/directory pairs to search |
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| 38 | */ |
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| 39 | protected $prefixes = array(); |
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| 40 | |||
| 41 | /** |
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| 42 | * @var bool Whether or not the autoloader should also act as a fallback autoloader |
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| 43 | */ |
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| 44 | protected $fallbackAutoloaderFlag = false; |
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| 45 | |||
| 46 | /** |
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| 47 | * Constructor |
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| 48 | * |
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| 49 | * @param null|array|\Traversable $options |
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| 50 | */ |
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| 51 | public function __construct($options = null) |
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| 52 | { |
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| 53 | if (null !== $options) { |
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| 54 | $this->setOptions($options); |
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| 55 | } |
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| 56 | } |
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| 57 | |||
| 58 | /** |
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| 59 | * Configure autoloader |
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| 60 | * |
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| 61 | * Allows specifying both "namespace" and "prefix" pairs, using the |
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| 62 | * following structure: |
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| 63 | * <code> |
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| 64 | * array( |
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| 65 | * 'namespaces' => array( |
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| 66 | * 'Zend' => '/path/to/Zend/library', |
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| 67 | * 'Doctrine' => '/path/to/Doctrine/library', |
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| 68 | * ), |
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| 69 | * 'prefixes' => array( |
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| 70 | * 'Phly_' => '/path/to/Phly/library', |
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| 71 | * ), |
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| 72 | * 'fallback_autoloader' => true, |
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| 73 | * ) |
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| 74 | * </code> |
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| 75 | * |
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| 76 | * @param array|\Traversable $options |
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| 77 | * @throws Exception\InvalidArgumentException |
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| 78 | * @return StandardAutoloader |
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| 79 | */ |
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| 80 | public function setOptions($options) |
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| 81 | { |
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| 82 | if (!is_array($options) && !($options instanceof \Traversable)) { |
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| 83 | require_once __DIR__ . '/Exception/InvalidArgumentException.php'; |
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| 84 | throw new Exception\InvalidArgumentException('Options must be either an array or Traversable'); |
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| 85 | } |
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| 86 | |||
| 87 | foreach ($options as $type => $pairs) { |
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| 88 | switch ($type) { |
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| 89 | case self::AUTOREGISTER_ZF: |
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| 90 | if ($pairs) { |
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| 91 | $this->registerNamespace('Zend', dirname(__DIR__)); |
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| 92 | } |
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| 93 | break; |
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| 94 | case self::LOAD_NS: |
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| 95 | if (is_array($pairs) || $pairs instanceof \Traversable) { |
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| 96 | $this->registerNamespaces($pairs); |
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| 97 | } |
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| 98 | break; |
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| 99 | case self::LOAD_PREFIX: |
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| 100 | if (is_array($pairs) || $pairs instanceof \Traversable) { |
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| 101 | $this->registerPrefixes($pairs); |
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| 102 | } |
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| 103 | break; |
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| 104 | case self::ACT_AS_FALLBACK: |
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| 105 | $this->setFallbackAutoloader($pairs); |
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| 106 | break; |
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| 107 | default: |
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| 108 | // ignore |
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| 109 | } |
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| 110 | } |
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| 111 | return $this; |
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| 112 | } |
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| 113 | |||
| 114 | /** |
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| 115 | * Set flag indicating fallback autoloader status |
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| 116 | * |
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| 117 | * @param bool $flag |
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| 118 | * @return StandardAutoloader |
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| 119 | */ |
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| 120 | public function setFallbackAutoloader($flag) |
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| 121 | { |
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| 122 | $this->fallbackAutoloaderFlag = (bool) $flag; |
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| 123 | return $this; |
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| 124 | } |
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| 125 | |||
| 126 | /** |
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| 127 | * Is this autoloader acting as a fallback autoloader? |
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| 128 | * |
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| 129 | * @return bool |
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| 130 | */ |
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| 131 | public function isFallbackAutoloader() |
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| 132 | { |
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| 133 | return $this->fallbackAutoloaderFlag; |
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| 134 | } |
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| 135 | |||
| 136 | /** |
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| 137 | * Register a namespace/directory pair |
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| 138 | * |
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| 139 | * @param string $namespace |
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| 140 | * @param string $directory |
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| 141 | * @return StandardAutoloader |
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| 142 | */ |
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| 143 | public function registerNamespace($namespace, $directory) |
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| 144 | { |
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| 145 | $namespace = rtrim($namespace, self::NS_SEPARATOR) . self::NS_SEPARATOR; |
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| 146 | $this->namespaces[$namespace] = $this->normalizeDirectory($directory); |
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| 147 | return $this; |
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| 148 | } |
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| 149 | |||
| 150 | /** |
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| 151 | * Register many namespace/directory pairs at once |
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| 152 | * |
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| 153 | * @param array $namespaces |
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| 154 | * @throws Exception\InvalidArgumentException |
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| 155 | * @return StandardAutoloader |
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| 156 | */ |
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| 157 | public function registerNamespaces($namespaces) |
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| 158 | { |
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| 159 | if (!is_array($namespaces) && !$namespaces instanceof \Traversable) { |
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| 160 | require_once __DIR__ . '/Exception/InvalidArgumentException.php'; |
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| 161 | throw new Exception\InvalidArgumentException('Namespace pairs must be either an array or Traversable'); |
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| 162 | } |
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| 163 | |||
| 164 | foreach ($namespaces as $namespace => $directory) { |
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| 165 | $this->registerNamespace($namespace, $directory); |
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| 166 | } |
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| 167 | return $this; |
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| 168 | } |
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| 169 | |||
| 170 | /** |
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| 171 | * Register a prefix/directory pair |
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| 172 | * |
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| 173 | * @param string $prefix |
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| 174 | * @param string $directory |
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| 175 | * @return StandardAutoloader |
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| 176 | */ |
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| 177 | public function registerPrefix($prefix, $directory) |
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| 178 | { |
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| 179 | $prefix = rtrim($prefix, self::PREFIX_SEPARATOR). self::PREFIX_SEPARATOR; |
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| 180 | $this->prefixes[$prefix] = $this->normalizeDirectory($directory); |
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| 181 | return $this; |
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| 182 | } |
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| 183 | |||
| 184 | /** |
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| 185 | * Register many namespace/directory pairs at once |
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| 186 | * |
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| 187 | * @param array $prefixes |
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| 188 | * @throws Exception\InvalidArgumentException |
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| 189 | * @return StandardAutoloader |
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| 190 | */ |
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| 191 | public function registerPrefixes($prefixes) |
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| 192 | { |
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| 193 | if (!is_array($prefixes) && !$prefixes instanceof \Traversable) { |
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| 194 | require_once __DIR__ . '/Exception/InvalidArgumentException.php'; |
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| 195 | throw new Exception\InvalidArgumentException('Prefix pairs must be either an array or Traversable'); |
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| 196 | } |
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| 197 | |||
| 198 | foreach ($prefixes as $prefix => $directory) { |
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| 199 | $this->registerPrefix($prefix, $directory); |
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| 200 | } |
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| 201 | return $this; |
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| 202 | } |
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| 203 | |||
| 204 | /** |
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| 205 | * Defined by Autoloadable; autoload a class |
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| 206 | * |
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| 207 | * @param string $class |
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| 208 | * @return false|string |
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| 209 | */ |
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| 210 | public function autoload($class) |
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| 211 | { |
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| 212 | $isFallback = $this->isFallbackAutoloader(); |
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| 213 | if (false !== strpos($class, self::NS_SEPARATOR)) { |
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| 214 | if ($this->loadClass($class, self::LOAD_NS)) { |
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| 215 | return $class; |
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| 216 | } elseif ($isFallback) { |
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| 217 | return $this->loadClass($class, self::ACT_AS_FALLBACK); |
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| 218 | } |
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| 219 | return false; |
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| 220 | } |
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| 221 | if (false !== strpos($class, self::PREFIX_SEPARATOR)) { |
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| 222 | if ($this->loadClass($class, self::LOAD_PREFIX)) { |
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| 223 | return $class; |
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| 224 | } elseif ($isFallback) { |
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| 225 | return $this->loadClass($class, self::ACT_AS_FALLBACK); |
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| 226 | } |
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| 227 | return false; |
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| 228 | } |
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| 229 | if ($isFallback) { |
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| 230 | return $this->loadClass($class, self::ACT_AS_FALLBACK); |
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| 231 | } |
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| 232 | return false; |
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| 233 | } |
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| 234 | |||
| 235 | /** |
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| 236 | * Register the autoloader with spl_autoload |
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| 237 | * |
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| 238 | * @return void |
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| 239 | */ |
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| 240 | public function register() |
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| 241 | { |
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| 242 | spl_autoload_register(array($this, 'autoload')); |
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| 243 | } |
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| 244 | |||
| 245 | /** |
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| 246 | * Transform the class name to a filename |
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| 247 | * |
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| 248 | * @param string $class |
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| 249 | * @param string $directory |
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| 250 | * @return string |
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| 251 | */ |
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| 252 | protected function transformClassNameToFilename($class, $directory) |
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| 253 | { |
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| 254 | // $class may contain a namespace portion, in which case we need |
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| 255 | // to preserve any underscores in that portion. |
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| 256 | $matches = array(); |
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| 257 | preg_match('/(?P<namespace>.+\\\)?(?P<class>[^\\\]+$)/', $class, $matches); |
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| 258 | |||
| 259 | $class = (isset($matches['class'])) ? $matches['class'] : ''; |
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| 260 | $namespace = (isset($matches['namespace'])) ? $matches['namespace'] : ''; |
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| 261 | |||
| 262 | return $directory |
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| 263 | . str_replace(self::NS_SEPARATOR, '/', $namespace) |
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| 264 | . str_replace(self::PREFIX_SEPARATOR, '/', $class) |
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| 265 | . '.php'; |
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| 266 | } |
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| 267 | |||
| 268 | /** |
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| 269 | * Load a class, based on its type (namespaced or prefixed) |
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| 270 | * |
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| 271 | * @param string $class |
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| 272 | * @param string $type |
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| 273 | * @return bool|string |
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| 274 | * @throws Exception\InvalidArgumentException |
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| 275 | */ |
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| 276 | protected function loadClass($class, $type) |
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| 277 | { |
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| 278 | if (!in_array($type, array(self::LOAD_NS, self::LOAD_PREFIX, self::ACT_AS_FALLBACK))) { |
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| 279 | require_once __DIR__ . '/Exception/InvalidArgumentException.php'; |
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| 280 | throw new Exception\InvalidArgumentException(); |
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| 281 | } |
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| 282 | |||
| 283 | // Fallback autoloading |
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| 284 | if ($type === self::ACT_AS_FALLBACK) { |
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| 285 | // create filename |
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| 286 | $filename = $this->transformClassNameToFilename($class, ''); |
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| 287 | $resolvedName = stream_resolve_include_path($filename); |
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| 288 | if ($resolvedName !== false) { |
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| 289 | return include $resolvedName; |
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| 290 | } |
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| 291 | return false; |
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| 292 | } |
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| 293 | |||
| 294 | // Namespace and/or prefix autoloading |
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| 295 | foreach ($this->$type as $leader => $path) { |
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| 296 | if (0 === strpos($class, $leader)) { |
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| 297 | // Trim off leader (namespace or prefix) |
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| 298 | $trimmedClass = substr($class, strlen($leader)); |
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| 299 | |||
| 300 | // create filename |
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| 301 | $filename = $this->transformClassNameToFilename($trimmedClass, $path); |
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| 302 | if (file_exists($filename)) { |
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| 303 | return include $filename; |
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| 304 | } |
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| 305 | return false; |
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| 306 | } |
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| 307 | } |
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| 308 | return false; |
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| 309 | } |
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| 310 | |||
| 311 | /** |
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| 312 | * Normalize the directory to include a trailing directory separator |
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| 313 | * |
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| 314 | * @param string $directory |
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| 315 | * @return string |
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| 316 | */ |
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| 317 | protected function normalizeDirectory($directory) |
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| 318 | { |
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| 319 | $last = $directory[strlen($directory) - 1]; |
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| 320 | if (in_array($last, array('/', '\\'))) { |
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| 321 | $directory[strlen($directory) - 1] = DIRECTORY_SEPARATOR; |
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| 322 | return $directory; |
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| 323 | } |
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| 324 | $directory .= DIRECTORY_SEPARATOR; |
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| 325 | return $directory; |
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| 326 | } |
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| 327 | } |