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<?php declare(strict_types=1);
/*
 * This file is part of sebastian/type.
 *
 * (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\Type;

final class ObjectType extends Type
{
    /**
     * @var TypeName
     */
    private $className;

/**
     * @var bool
     */
    private $allowsNull;

public function __construct(TypeName $className, bool $allowsNull)
    {
        $this->className  = $className;
        $this->allowsNull = $allowsNull;
    }

public function isAssignable(Type $other): bool
    {
        if ($this->allowsNull && $other instanceof NullType) {
            return true;
        }

if ($other instanceof self) {
            if (0 === \strcasecmp($this->className->getQualifiedName(), $other->className->getQualifiedName())) {
                return true;
            }

if (\is_subclass_of($other->className->getQualifiedName(), $this->className->getQualifiedName(), true)) {
                return true;
            }
        }

return false;
    }

public function getReturnTypeDeclaration(): string
    {
        return ': ' . ($this->allowsNull ? '?' : '') . $this->className->getQualifiedName();
    }

public function allowsNull(): bool
    {
        return $this->allowsNull;
    }

public function className(): TypeName
    {
        return $this->className;
    }
}