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<?php
namespace Illuminate\Foundation;
class AliasLoader
{
/**
* The array of class aliases.
*
* @var array
*/
protected $aliases;
/**
* Indicates if a loader has been registered.
*
* @var bool
*/
protected $registered = false;
/**
* The singleton instance of the loader.
*
* @var \Illuminate\Foundation\AliasLoader
*/
protected static $instance;
/**
* Create a new AliasLoader instance.
*
* @param array $aliases
*/
private function __construct($aliases)
{
$this->aliases = $aliases;
}
/**
* Get or create the singleton alias loader instance.
*
* @param array $aliases
* @return \Illuminate\Foundation\AliasLoader
*/
public static function getInstance(array $aliases = [])
{
if (is_null(static::$instance)) {
return static::$instance = new static($aliases);
}
$aliases = array_merge(static::$instance->getAliases(), $aliases);
static::$instance->setAliases($aliases);
return static::$instance;
}
/**
* Load a class alias if it is registered.
*
* @param string $alias
* @return bool|null
*/
public function load($alias)
{
if (isset($this->aliases[$alias])) {
return class_alias($this->aliases[$alias], $alias);
}
}
/**
* Add an alias to the loader.
*
* @param string $class
* @param string $alias
* @return void
*/
public function alias($class, $alias)
{
$this->aliases[$class] = $alias;
}
/**
* Register the loader on the auto-loader stack.
*
* @return void
*/
public function register()
{
if (! $this->registered) {
$this->prependToLoaderStack();
$this->registered = true;
}
}
/**
* Prepend the load method to the auto-loader stack.
*
* @return void
*/
protected function prependToLoaderStack()
{
spl_autoload_register([$this, 'load'], true, true);
}
/**
* Get the registered aliases.
*
* @return array
*/
public function getAliases()
{
return $this->aliases;
}
/**
* Set the registered aliases.
*
* @param array $aliases
* @return void
*/
public function setAliases(array $aliases)
{
$this->aliases = $aliases;
}
/**
* Indicates if the loader has been registered.
*
* @return bool
*/
public function isRegistered()
{
return $this->registered;
}
/**
* Set the "registered" state of the loader.
*
* @param bool $value
* @return void
*/
public function setRegistered($value)
{
$this->registered = $value;
}
/**
* Set the value of the singleton alias loader.
*
* @param \Illuminate\Foundation\AliasLoader $loader
* @return void
*/
public static function setInstance($loader)
{
static::$instance = $loader;
}
/**
* Clone method.
*
* @return void
*/
private function __clone()
{
//
}
}