setOptions($options);
}
}
/**
* Configure autoloader
*
* Allows specifying both "namespace" and "prefix" pairs, using the
* following structure:
*
* array(
* 'namespaces' => array(
* 'Zend' => '/path/to/Zend/library',
* 'Doctrine' => '/path/to/Doctrine/library',
* ),
* 'prefixes' => array(
* 'Phly_' => '/path/to/Phly/library',
* ),
* 'fallback_autoloader' => true,
* )
*
*
* @param array|\Traversable $options
* @throws Exception\InvalidArgumentException
* @return StandardAutoloader
*/
public function setOptions($options)
{
if (! is_array($options) && ! ($options instanceof \Traversable)) {
require_once __DIR__ . '/Exception/InvalidArgumentException.php';
throw new Exception\InvalidArgumentException('Options must be either an array or Traversable');
}
foreach ($options as $type => $pairs) {
switch ($type) {
case self::AUTOREGISTER_ZF:
if ($pairs) {
$this->registerNamespace('Zend', dirname(__DIR__));
$this->registerNamespace(
'ZendXml',
dirname(dirname((__DIR__))) . DIRECTORY_SEPARATOR . 'ZendXml'
);
}
break;
case self::LOAD_NS:
if (is_array($pairs) || $pairs instanceof \Traversable) {
$this->registerNamespaces($pairs);
}
break;
case self::LOAD_PREFIX:
if (is_array($pairs) || $pairs instanceof \Traversable) {
$this->registerPrefixes($pairs);
}
break;
case self::ACT_AS_FALLBACK:
$this->setFallbackAutoloader($pairs);
break;
default:
// ignore
}
}
return $this;
}
/**
* Set flag indicating fallback autoloader status
*
* @param bool $flag
* @return StandardAutoloader
*/
public function setFallbackAutoloader($flag)
{
$this->fallbackAutoloaderFlag = (bool) $flag;
return $this;
}
/**
* Is this autoloader acting as a fallback autoloader?
*
* @return bool
*/
public function isFallbackAutoloader()
{
return $this->fallbackAutoloaderFlag;
}
/**
* Register a namespace/directory pair
*
* @param string $namespace
* @param string $directory
* @return StandardAutoloader
*/
public function registerNamespace($namespace, $directory)
{
$namespace = rtrim($namespace, self::NS_SEPARATOR) . self::NS_SEPARATOR;
$this->namespaces[$namespace] = $this->normalizeDirectory($directory);
return $this;
}
/**
* Register many namespace/directory pairs at once
*
* @param array $namespaces
* @throws Exception\InvalidArgumentException
* @return StandardAutoloader
*/
public function registerNamespaces($namespaces)
{
if (! is_array($namespaces) && ! $namespaces instanceof \Traversable) {
require_once __DIR__ . '/Exception/InvalidArgumentException.php';
throw new Exception\InvalidArgumentException('Namespace pairs must be either an array or Traversable');
}
foreach ($namespaces as $namespace => $directory) {
$this->registerNamespace($namespace, $directory);
}
return $this;
}
/**
* Register a prefix/directory pair
*
* @param string $prefix
* @param string $directory
* @return StandardAutoloader
*/
public function registerPrefix($prefix, $directory)
{
$prefix = rtrim($prefix, self::PREFIX_SEPARATOR). self::PREFIX_SEPARATOR;
$this->prefixes[$prefix] = $this->normalizeDirectory($directory);
return $this;
}
/**
* Register many namespace/directory pairs at once
*
* @param array $prefixes
* @throws Exception\InvalidArgumentException
* @return StandardAutoloader
*/
public function registerPrefixes($prefixes)
{
if (! is_array($prefixes) && ! $prefixes instanceof \Traversable) {
require_once __DIR__ . '/Exception/InvalidArgumentException.php';
throw new Exception\InvalidArgumentException('Prefix pairs must be either an array or Traversable');
}
foreach ($prefixes as $prefix => $directory) {
$this->registerPrefix($prefix, $directory);
}
return $this;
}
/**
* Defined by Autoloadable; autoload a class
*
* @param string $class
* @return false|string
*/
public function autoload($class)
{
$isFallback = $this->isFallbackAutoloader();
if (false !== strpos($class, self::NS_SEPARATOR)) {
if ($this->loadClass($class, self::LOAD_NS)) {
return $class;
} elseif ($isFallback) {
return $this->loadClass($class, self::ACT_AS_FALLBACK);
}
return false;
}
if (false !== strpos($class, self::PREFIX_SEPARATOR)) {
if ($this->loadClass($class, self::LOAD_PREFIX)) {
return $class;
} elseif ($isFallback) {
return $this->loadClass($class, self::ACT_AS_FALLBACK);
}
return false;
}
if ($isFallback) {
return $this->loadClass($class, self::ACT_AS_FALLBACK);
}
return false;
}
/**
* Register the autoloader with spl_autoload
*
* @return void
*/
public function register()
{
spl_autoload_register([$this, 'autoload']);
}
/**
* Transform the class name to a filename
*
* @param string $class
* @param string $directory
* @return string
*/
protected function transformClassNameToFilename($class, $directory)
{
// $class may contain a namespace portion, in which case we need
// to preserve any underscores in that portion.
$matches = [];
preg_match('/(?P.+\\\)?(?P[^\\\]+$)/', $class, $matches);
$class = (isset($matches['class'])) ? $matches['class'] : '';
$namespace = (isset($matches['namespace'])) ? $matches['namespace'] : '';
return $directory
. str_replace(self::NS_SEPARATOR, '/', $namespace)
. str_replace(self::PREFIX_SEPARATOR, '/', $class)
. '.php';
}
/**
* Load a class, based on its type (namespaced or prefixed)
*
* @param string $class
* @param string $type
* @return bool|string
* @throws Exception\InvalidArgumentException
*/
protected function loadClass($class, $type)
{
if (! in_array($type, [self::LOAD_NS, self::LOAD_PREFIX, self::ACT_AS_FALLBACK])) {
require_once __DIR__ . '/Exception/InvalidArgumentException.php';
throw new Exception\InvalidArgumentException();
}
// Fallback autoloading
if ($type === self::ACT_AS_FALLBACK) {
// create filename
$filename = $this->transformClassNameToFilename($class, '');
$resolvedName = stream_resolve_include_path($filename);
if ($resolvedName !== false) {
return include $resolvedName;
}
return false;
}
// Namespace and/or prefix autoloading
foreach ($this->$type as $leader => $path) {
if (0 === strpos($class, $leader)) {
// Trim off leader (namespace or prefix)
$trimmedClass = substr($class, strlen($leader));
// create filename
$filename = $this->transformClassNameToFilename($trimmedClass, $path);
if (file_exists($filename)) {
return include $filename;
}
}
}
return false;
}
/**
* Normalize the directory to include a trailing directory separator
*
* @param string $directory
* @return string
*/
protected function normalizeDirectory($directory)
{
$last = $directory[strlen($directory) - 1];
if (in_array($last, ['/', '\\'])) {
$directory[strlen($directory) - 1] = DIRECTORY_SEPARATOR;
return $directory;
}
$directory .= DIRECTORY_SEPARATOR;
return $directory;
}
}