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<?php declare(strict_types=1);
/*
* This file is part of sebastian/comparator.
*
* (c) Sebastian Bergmann <sebastian@phpunit.de>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace SebastianBergmann\Comparator;
use function array_unshift;
final class Factory
{
private static ?Factory $instance = null;
/**
* @psalm-var list<Comparator>
*/
private array $customComparators = [];
/**
* @psalm-var list<Comparator>
*/
private array $defaultComparators = [];
public static function getInstance(): self
{
if (self::$instance === null) {
self::$instance = new self; // @codeCoverageIgnore
}
return self::$instance;
}
public function __construct()
{
$this->registerDefaultComparators();
}
public function getComparatorFor(mixed $expected, mixed $actual): Comparator
{
foreach ($this->customComparators as $comparator) {
if ($comparator->accepts($expected, $actual)) {
return $comparator;
}
}
foreach ($this->defaultComparators as $comparator) {
if ($comparator->accepts($expected, $actual)) {
return $comparator;
}
}
throw new RuntimeException('No suitable Comparator implementation found');
}
/**
* Registers a new comparator.
*
* This comparator will be returned by getComparatorFor() if its accept() method
* returns TRUE for the compared values. It has higher priority than the
* existing comparators, meaning that its accept() method will be invoked
* before those of the other comparators.
*/
public function register(Comparator $comparator): void
{
array_unshift($this->customComparators, $comparator);
$comparator->setFactory($this);
}
/**
* Unregisters a comparator.
*
* This comparator will no longer be considered by getComparatorFor().
*/
public function unregister(Comparator $comparator): void
{
foreach ($this->customComparators as $key => $_comparator) {
if ($comparator === $_comparator) {
unset($this->customComparators[$key]);
}
}
}
public function reset(): void
{
$this->customComparators = [];
}
private function registerDefaultComparators(): void
{
$this->registerDefaultComparator(new MockObjectComparator);
$this->registerDefaultComparator(new DateTimeComparator);
$this->registerDefaultComparator(new DOMNodeComparator);
$this->registerDefaultComparator(new SplObjectStorageComparator);
$this->registerDefaultComparator(new ExceptionComparator);
$this->registerDefaultComparator(new ObjectComparator);
$this->registerDefaultComparator(new ResourceComparator);
$this->registerDefaultComparator(new ArrayComparator);
$this->registerDefaultComparator(new NumericComparator);
$this->registerDefaultComparator(new ScalarComparator);
$this->registerDefaultComparator(new TypeComparator);
}
private function registerDefaultComparator(Comparator $comparator): void
{
$this->defaultComparators[] = $comparator;
$comparator->setFactory($this);
}
}
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